Asus H81M-C Manual
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Motherboard
H81M-C
H81M-C/CSM
ii
E8447
First Edition V1
July 2013
Copyright © 2013 ASUSTeK COMPUTER INC. All Rights Reserved.
No part of this manual, including the products and software described in it, may be reproduced,
transmitted, transcribed, stored in a retrieval system, or translated into any language in any form or by any
means, except documentation kept by the purchaser for backup purposes, without the express written
permission of ASUSTeK COMPUTER INC. (“ASUS”).
Product warranty or service will not be extended if: (1) the product is repaired, modied or altered, unless
such repair, modication of alteration is authorized in writing by ASUS; or (2) the serial number of the
product is defaced or missing.
ASUS PROVIDES THIS MANUAL “AS IS” WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS
OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OR CONDITIONS OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL ASUS, ITS
DIRECTORS, OFFICERS, EMPLOYEES OR AGENTS BE LIABLE FOR ANY INDIRECT, SPECIAL,
INCIDENTAL, OR CONSEQUENTIAL DAMAGES (INCLUDING DAMAGES FOR LOSS OF PROFITS,
LOSS OF BUSINESS, LOSS OF USE OR DATA, INTERRUPTION OF BUSINESS AND THE LIKE),
EVEN IF ASUS HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES ARISING FROM ANY
DEFECT OR ERROR IN THIS MANUAL OR PRODUCT.
SPECIFICATIONS AND INFORMATION CONTAINED IN THIS MANUAL ARE FURNISHED FOR
INFORMATIONAL USE ONLY, AND ARE SUBJECT TO CHANGE AT ANY TIME WITHOUT NOTICE,
AND SHOULD NOT BE CONSTRUED AS A COMMITMENT BY ASUS. ASUS ASSUMES NO
RESPONSIBILITY OR LIABILITY FOR ANY ERRORS OR INACCURACIES THAT MAY APPEAR IN THIS
MANUAL, INCLUDING THE PRODUCTS AND SOFTWARE DESCRIBED IN IT.
Products and corporate names appearing in this manual may or may not be registered trademarks or
copyrights of their respective companies, and are used only for identication or explanation and to the
owners’ benet, without intent to infringe.
Offer to Provide Source Code of Certain Software
This product contains copyrighted software that is licensed under the General Public License (“GPL”),
under the Lesser General Public License Version (“LGPL”) and/or other Free Open Source Software
Licenses. Such software in this product is distributed without any warranty to the extent permitted by the
applicable law. Copies of these licenses are included in this product.
Where the applicable license entitles you to the source code of such software and/or other additional data,
you may obtain it for a period of three years after our last shipment of the product, either
(1) for free by downloading it from http://support.asus.com/download
or
(2) for the cost of reproduction and shipment, which is dependent on the preferred carrier and the location
where you want to have it shipped to, by sending a request to:
ASUSTeK Computer Inc.
Legal Compliance Dept.
15 Li Te Rd.,
Beitou, Taipei 112
Taiwan
In your request please provide the name, model number and version, as stated in the About Box of the
product for which you wish to obtain the corresponding source code and your contact details so that we
can coordinate the terms and cost of shipment with you.
The source code will be distributed WITHOUT ANY WARRANTY and licensed under the same license as
the corresponding binary/object code.
This offer is valid to anyone in receipt of this information.
ASUSTeK is eager to duly provide complete source code as required under various Free Open Source
Software licenses. If however you encounter any problems in obtaining the full corresponding source
code we would be much obliged if you give us a notication to the email address gpl@asus.com, stating
the product and describing the problem (please DO NOT send large attachments such as source code
archives, etc. to this email address).
iv
Safety information
Electrical safety
To prevent electrical shock hazard, disconnect the power cable from the electrical outlet
before relocating the system.
When adding or removing devices to or from the system, ensure that the power cables
for the devices are unplugged before the signal cables are connected. If possible,
disconnect all power cables from the existing system before you add a device.
Before connecting or removing signal cables from the motherboard, ensure that all
power cables are unplugged.
Seek professional assistance before using an adapter or extension cord. These devices
could interrupt the grounding circuit.
Ensure that your power supply is set to the correct voltage in your area. If you are not
sure about the voltage of the electrical outlet you are using, contact your local power
company.
If the power supply is broken, do not try to x it by yourself. Contact a qualied service
technician or your retailer.
Operation safety
Before installing the motherboard and adding components, carefully read all the manuals
that came with the package.
Before using the product, ensure all cables are correctly connected and the power
cables are not damaged. If you detect any damage, contact your dealer immediately.
To avoid short circuits, keep paper clips, screws, and staples away from connectors,
slots, sockets and circuitry.
Avoid dust, humidity, and temperature extremes. Do not place the product in any area
where it may be exposed to moisture.
Place the product on a stable surface.
If you encounter technical problems with the product, contact a qualied service
technician or your retailer.
About this guide
This user guide contains the information you need when installing and conguring the
motherboard.
How this guide is organized
This guide contains the following parts:
• Chapter 1: Product introduction
This chapter describes the features of the motherboard and the new technology it
supports. It includes descriptions of the switches, jumpers, and connectors on the
motherboard.
• Chapter 2: BIOS information
This chapter discusses changing system settings through the BIOS Setup menus.
Detailed descriptions fo the BIOS parameters are also provided.
•
•
•
•
•
•
•
•
•
•
•
•
v
Where to nd more information
Refer to the following sources for additional information and for product and software
updates.
1. ASUS websites
The ASUS website provides updated information on ASUS hardware and software
products. Refer to the ASUS contact information.
2. Optional documentation
Your product package may include optional documentation, such as warranty yers,
that may have been added by your dealer. These documents are not part of the
standard package.
Conventions used in this guide
To ensure that you perform certain tasks properly, take note of the following symbols used
throughout this manual.
DANGER/WARNING: Information to prevent injury to yourself when
completing a task.
CAUTION: Information to prevent damage to the components when
completing a task
IMPORTANT: Instructions that you MUST follow to complete a task.
NOTE: Tips and additional information to help you complete a task.
Typography
Bold text Indicates a menu or an item to select.
Italics
Used to emphasize a word or a phrase.
<Key> Keys enclosed in the less-than and greater-than sign
means that you must press the enclosed key.
Example: <Enter> means that you must press the Enter or
Return key.
<Key1> + <Key2> + <Key3> If you must press two or more keys simultaneously, the key
names are linked with a plus sign (+).
vi
H81M-C specications summary
(continued on the next page)
CPU LGA1150 socket for 4th Generation Intel
® CoreTM i7/i5/i3, Pentium®,
Celeron® Processors
Supports Intel® 22nm CPU
Supports Intel® Turbo Boost Technology 2.0*
* The Intel® Turbo Boost Technology 2.0 support depends on the CPU types.
** Refer to www.asus.com for Intel® CPU support list.
Chipset Intel® H81 Express Chipset
Memory 2 x DIMM, max. 16GB, DDR3 1600 / 1333 / 1066 MHz, non-ECC, un-
buffered memory*
Dual-channel memory architecture
Supports Intel® Extreme Memory Prole (XMP)
* Hyper DIMM support is subject to the physical characteristics of individual CPUs.
Please refer to the Memory QVL (Qualied Vendors List) for details.
** Refer to www.asus.com for the latest Memory QVL (Qualied Vendors List).
*** Due to Intel® chipset limitation, the DDR3 1600MHz and higher memory
modules on XMP mode will run at the maximum transfer rate of DDR3 1600MHz.
Graphics Multi-VGA output support: D-SUB, DVI-D ports
- Supports DVI-D with max.resolution of 1920 x 1200 @60Hz
- Supports D-SUB with max. resolution of 1920 x 1200 @60Hz
Maximum shared memory of 1024 MB
Expansion slots 1 x PCI Express 2.0 p6-x16 slot
2 x PCI Express 2.0 p6-x1 slots
1 x PCI slot
Storage Intel® H81 Express Chipset:
- 2 x Serial ATA 6.0 Gb/s connector (yellow)
- 2 x Serial ATA 3.0 Gb/s connector (dark brown)
Audio Realtek®
ALC887 7.1-channel Audio CODEC
- Supports jack-detection, multi-streaming, front panel jack-restasking
* Use a chassis with HD audio module in the front panel to support an 7.1-channel
audio output.
LAN Realtek 8111G PCIe Gigabit LAN controller
Package contents
Check your motherboard package for the following items.
Motherboard ASUS H81M-C motherboard
Cables 2 x Serial ATA 6.0 Gb/s cables
Accessories 1 x I/O Shield
Application DVD Support DVD
Documentation User Guide
If any of the above items is damaged or missing, contact your retailer.
vii
H81M-C specications summary
USB Intel® H81 Express Chipset
- 2 x USB 3.0/2.0 ports at back panel
- 8 x USB2.0/1.1 ports (4 ports at midboard, 4 ports at back panel)
ASUS unique
features
ASUS EZ DIY
- ASUS CrashFree BIOS 3
- ASUS EZ Flash 2
- ASUS MyLogo 2
- ASUS Q-SLOT
ASUS Exclusive Features
- ASUS ESD Guards - Enhanced ESD protection
- ASUS High-Quality 5K-Hour Solid Capacitors -
2.5x long lifespan
with excellent durability
- ASUS Stainless Steel Back I/O - 3x more durable corrosion-resistant
coating
- ASUS GPU Boost
- ASUS USB 3.0 Boost
- ASUS Network iControl
- ASUS AI Suite 3
- ASUS AI Charger
- ASUS Anti-surge
- ASUS UEFI BIOS EZ Mode featuring friendly graphics user interface
- ASUS EPU
ASUS Quiet Thernal Solution
- ASUS FAN Xpert
100% Solid Capacitors
ASUS Webstorage
Special Features 100% All High-quality Conductive Polymer Capacitors
Rear panel I/O
ports
1 x PS/2 keyboard port (purple)
1 x PS/2 mouse port (green)
1 x DVI port
1 x RGB port
1 x LPT port
1 x LAN (RJ-45) port
2 x USB 3.0/2.0 ports
4 x USB 2.0/1.1 ports
3 x Audio jacks support 8-channel audio output
(continued on the next page)
viii
H81M-C specications summary
Internal
connectors
2 x USB 2.0/1.1 connectors support additional 4 USB 2.0 ports
2 x SATA 6.0 Gb/s connectors
2 x SATA 3.0 Gb/s connectors
1 x CLRTC jumper
1 x 4-pin CPU fan connector
1 x 4-pin Chassis fan connectors
1 x Front panel audio connector (AAFP)
1 x System panel connector
1 x Speaker connector
1 x TPM Header
1 x COM connector
1 x 24-pin ATX power connector
1 x 4-pin ATX 12V power connector
BIOS features 64 Mb Flash ROM, UEFI BIOS, PnP, DMI v2.0, WfM2.0, SM BIOS v2.7, ACPI v2.0a,
SLP3.0, EUP-ready
Manageability WOL, PXE, PME Wake up
Support DVD Drivers
ASUS utilities
EZ Update
Anti-virus software (OEM version)
Operating
System
Support
Windows® 8 / Windows® 7
Form factor uATX form factor: 9.6”x 7” (24.4cm x 17.8cm)
Specications are subject to change without notice.
ASUS H81M-C 1-1
Product introduction
1
1.1 Before you proceed
Take note of the following precautions before you install motherboard components or change
any motherboard settings.
• Unplug the power cord from the wall socket before touching any component.
• Before handling components, use a grounded wrist strap or touch a safely grounded
object or a metal object, such as the power supply case, to avoid damaging them due
to static electricity.
• Hold components by the edges to avoid touching the ICs on them.
• Whenever you uninstall any component, place it on a grounded antistatic pad or in the
bag that came with the component.
• Before you install or remove any component, ensure that the ATX power supply is
switched off or the power cord is detached from the power supply. Failure to do so
may cause severe damage to the motherboard, peripherals, or components.
1.2 Motherboard overview
Before you install the motherboard, study the conguration of your chassis to ensure that the
motherboard ts.
Unplug the power cord before installing or removing the motherboard. Failure to do so can
cause you physical injury and damage to motherboard components.
1.2.1 Placement direction
When installing the motherboard, place it into the chassis in the correct orientation. The edge
with external ports goes to the rear part of the chassis as indicated in the image.
1.2.2 Screw holes
Place six screws into the holes indicated by circles to secure the motherboard to the chassis.
Do not overtighten the screws! Doing so can damage the motherboard.
1-2 Chapter 1: Product introduction
H81M-C
Place this side
towards the rear
of the chassis
1.2.3 Motherboard layout
H81M-C
PCIEX16_1
PCIEX1_1
PCIEX1_2
PCI1
RTL
8111G
COM
AAFP
EATXPWR
CPU_FAN
BATTERY
Super
I/O
ALC
887-VD2
ASM
1083
KBMS
8Mb
BIOS
SB_PWR
CLRTC
USBPW9-12
PS2_USBPW1-6
SPEAKER
17.8cm(7.0in)
DDR3 DIMM_A1 (64bit, 240-pin module)
DDR3 DIMM_B1 (64bit, 240-pin module)
SATA3G_2
SATA3G_1
SATA6G_1 SATA6G_2
AUDIO
LAN_USB3_12
USB3~6
CHA_FAN
24.4cm(9.6in)
LGA1150
DIGI
+VRM
Intel ®
H81
ATX12V
F_PANEL
USB910
TPM USB1112
VGA
LPT
DVI
21 3 54 3
14 11 10 9 8121516 13
2
6
7
1-4 Chapter 1: Product introduction
1.3.1 Installing the CPU
1
23
A
B
Unplug all power cables before installing the CPU.
• Ensure that you install the correct CPU designed for the LGA1150 socket only. DO
NOT install a CPU designed for LGA1155 and LGA1156 sockets on the LGA1150
socket.
• Upon purchase of the motherboard, ensure that the PnP cap is on the socket and
the socket contacts are not bent. Contact your retailer immediately if the PnP cap
is missing, or if you see any damage to the PnP cap/socket contacts/motherboard
components. ASUS will shoulder the cost of repair only if the damage is shipment/
transit-related.
• Keep the cap after installing the motherboard. ASUS will process Return Merchandise
Authorization (RMA) requests only if the motherboard comes with the cap on the
LGA1150 socket.
• The product warranty does not cover damage to the socket contacts resulting from
incorrect CPU installation/removal, or misplacement/loss/incorrect removal of the PnP
cap.
ASUS H81M-C 1-5
A
B
C
5
4
1.3.2 CPU heatsink and fan assembly installation
Apply the Thermal Interface Material
to the CPU heatsink and CPU
before you install the heatsink and
fan if necessary.
1-6 Chapter 1: Product introduction
3 4
A
B
B
A
To uninstall the CPU heatsink and fan assembly
2
1
To install the CPU heatsink and fan assembly
2
B
A
A
B
1
ASUS H81M-C 1-7
1.4 System memory
1.4.1 Overview
This motherboard comes with two Double Data Rate 3 (DDR3) Dual Inline Memory Module
(DIMM) sockets. A DDR3 module is notched differently from a DDR or DDR2 module. DO
NOT install a DDR or DDR2 memory module to the DDR3 slot.
According to Intel ® CPU spec, DIMM voltage below 1.65V is recommended to protect the
CPU.
Channel Sockets
Channel A DIMM_A1
Channel B DIMM_B1
H81M-C
H81M-C 240-pin DDR3 DIMM sockets
DIMM_A1
DIMM_B1
1.4.2 Memory congurations
You may install 1GB, 2GB, 4GB, and 8GB unbuffered non-ECC DDR3 DIMMs into the DIMM
sockets.
• You may install varying memory sizes in Channel A and Channel B. The system maps
the total size of the lower-sized channel for the dual-channel conguration. Any excess
memory from the higher-sized channel is then mapped for single-channel operation.
• Due to Intel ®
chipset limitation, DDR3 1600MHz and higher memory modules on XMP
mode will run at the maximum transfer rate of DDR3 1600MHz.
• Always install DIMMs with the same CAS latency. For optimal compatibility, we
recommend that you install memory modules of the same version or date code (D/C)
from the same vendor. Check with the retailer to get the correct memory modules.
• Due to the memory address limitation on 32-bit Windows ® OS, when you install 4GB
or more memory on the motherboard, the actual usable memory for the OS can be
about 3GB or less. For effective use of memory, we recommend that you do any of the
following:
- Use a maximum of 3GB system memory if you are using a 32-bit Windows ® OS.
- Install a 64-bit Windows ® OS if you want to install 4GB or more on the
motherboard.
• This motherboard does not support DIMMs made up of 512Mb (64MB) chips or less.
1-8 Chapter 1: Product introduction
• The default memory operation frequency is dependent on its Serial Presence Detect
(SPD), which is the standard way of accessing information from a memory module.
Under the default state, some memory modules for overclocking may operate at a
lower frequency than the vendor-marked value. To operate at the vendor-marked
or at a higher frequency, refer to section 2.5 Ai Tweaker menu for manual memory
frequency adjustment.
• For system stability, use a more efcient memory cooling system to support a full
memory load (2 DIMMs) or overclocking condition.
• Visit the ASUS website at: www.asus.com for the latest QVL.
1.4.3 Installing a DIMM
Unplug the power supply before adding or removing DIMMs or other system components.
Failure to do so can cause severe damage to both the motherboard and the components.
1. Press the retaining clips
outward to unlock a DIMM
socket.
2. Align a DIMM on the socket
such that the notch on the
DIMM matches the DIMM
slot key on the socket.
A DIMM is keyed with a notch so that it ts in only one direction. DO NOT force a DIMM into
a socket in the wrong direction to avoid damaging the DIMM.
3. Firmly insert the DIMM into the
socket until the retaining clips snap
back in place and the DIMM is
properly seated.
1.4.4 Removing a DIMM
To remove a DIMM:
1. Simultaneously press the retaining clips outward to unlock the DIMM.
Unlocked retaining clip
1
DIMM notch
2
1
DIMM slot key
Locked Retaining Clip
3
ASUS H81M-C 1-9
2. Remove the DIMM from the socket.
Support the DIMM lightly with
your ngers when pressing the
retaining clips. The DIMM might
get damaged when it ips out
with extra force.
1.5 Expansion slots
In the future, you may need to install expansion cards. The following sub-sections describe
the slots and the expansion cards that they support.
Unplug the power cord before adding or removing expansion cards. Failure to do so may
cause you physical injury and damage motherboard components.
1.5.1 Installing an expansion card
To install an expansion card:
1. Before installing the expansion card, read the documentation that came with it and
make the necessary hardware settings for the card.
2. Remove the system unit cover (if your motherboard is already installed in a chassis).
3. Remove the bracket opposite the slot that you intend to use. Keep the screw for later
use.
4. Align the card connector with the slot and press rmly until the card is completely
seated on the slot.
5. Secure the card to the chassis with the screw you removed earlier.
6. Replace the system cover.
1.5.2 Conguring an expansion card
After installing the expansion card, congure it by adjusting the software settings.
1. Turn on the system and change the necessary BIOS settings, if any. See Chapter 2 for
information on BIOS setup.
2. Assign an IRQ to the card.
3. Install the software drivers for the expansion card.
When using PCI cards on shared slots, ensure that the drivers support “Share IRQ” or that
the cards do not need IRQ assignments. Otherwise, conicts will arise between the two PCI
groups, making the system unstable and the card inoperable.
DIMM notch
1
1
2
1-10 Chapter 1: Product introduction
1.5.3 PCI Express 2.0 p18-x1 slots
This motherboard supports PCI Express p18-x1 network cards, SCSI cards, and other cards that
comply with the PCI Express specications.
1.5.4 PCI Express x16 slot
This motherboard has a PCI Express x16 slot that supports PCI Express x16 graphic cards
complying with the PCI Express specications.
1.5.3 PCI slots
The PCI slot supports cards such as a LAN card, SCSI card, USB card, and other cards that
comply with PCI specications.
1.6 Jumpers
1. Clear RTC RAM (3-pin CLRTC)
This jumper allows you to clear the Real Time Clock (RTC) RAM in CMOS. You can
clear the CMOS memory of date, time, and system setup parameters by erasing
the CMOS RTC RAM data. The onboard button cell battery powers the RAM data in
CMOS, which include system setup information such as system passwords.
IRQ assignments for this motherboard
H81M-C
H81M-C Clear RTC RAM
A B C D E F G H
LAN – – shared – – – – –
PCIE x16_1 shared – – – – – – –
PCIE x1_1 – – shared – – – – –
PCIE x1_2 – – – shared – – – –
PCIE x1_3 shared – – – – – – –
Intel PCH SATA Controller – – – shared – – – –
HD Audio – – – – – – shared –
USB2.0_1 – – – – – – – shared
USB2.0_2 – – – – shared – – –
USB3.0 – – – – – shared – –
To erase the RTC RAM:
1. Turn OFF the computer and unplug the power cord.
ASUS H81M-C 1-11
• If the steps above do not help, remove the onboard battery and move the jumper
again to clear the CMOS RTC RAM data. After clearing the CMOS, reinstall the
battery.
• You do not need to clear the RTC when the system hangs due to overclocking. For
system failure due to overclocking, use the CPU Parameter Recall (C.P.R.) feature.
Shut down and reboot the system, then the BIOS automatically resets parameter
settings to default values.
2. PS2 and USB device wake-up (PS2_USBPW1~6)
Set this jumper to +5V to wake up the computer from S1 sleep mode (CPU stopped,
DRAM refreshed, system running in low power mode) using the connected USB
devices. Set to +5VSB to wake up from S3 and S4 sleep modes (no power to CPU,
DRAM in slow refresh, power supply in reduced power mode).
H81M- C
H81M-C Keyboard Power Setting
PS2_USBPW1-6
21
2 3
+5V
(Default)
+5VSB
• The USB device wake-up feature requires a power supply that can provide 500mA on
the +5VSB lead for each USB port; otherwise, the system would not power up.
• The total current consumed must NOT exceed the power supply capability (+5VSB)
whether under normal condition or in sleep mode.
2. Move the jumper cap from pins 1-2 (default) to pins 2-3. Keep the cap on pins 2-3
for about 5-10 seconds, then move the cap back to pins 1-2. 3. Plug the
power cord and turn ON the computer.
4. Hold down the <Del> key during the boot process and enter BIOS setup to re-
enter data.
Except when clearing the RTC RAM, never remove the cap on CLRTC jumper default
position. Removing the cap will cause system boot failure!
1-12 Chapter 1: Product introduction
1.7 Connectors
1.7.1 Rear panel connectors
LAN port
Speed
LED
Activity Link
LED
3
7
4 5
6
1
11
2
10 9 8
1. PS/2 mouse port (green). This port is for a PS/2 mouse.
2. Parallel port. This 25-pin port connects a parallel printer, a scanner, or other devices.
3. LAN (RJ-45) port. This port allows Gigabit connection to a Local Area Network (LAN)
through a network hub.
LAN port LED indications
3. USB device wake-up (USBPW9~12)
This jumper allows you to enable or disable the USB device wake-up feature. When
you set this jumper to pins 2-3 (+5VSB), you can wake up the computer by pressing a
key on the USB keyboard or by clicking on the USB mouse. This feature requires an
ATX power supply that can supply at least 1A on the +5VSB lead, and a corresponding
setting in the BIOS.
H81M- C
H81M-C USB Device Wake Up
21 2 3
+5V
(Default)
+5VSB
USBPW9-12
Activity/Link LED Speed LED
Status Description Status Description
Off No link OFF 10Mbps connection
Orange Linked ORANGE 100Mbps
connection
Orange (Blinking) Data activity GREEN 1Gbps connection
Orange (Blinking
then steady)
Ready to wake
up from S5 mode
ASUS H81M-C 1-13
4. Line In port (light blue). This port connects to the tape, CD, DVD player, or other
audio sources.
5. Line Out port (lime). This port connects to a headphone or a speaker. In the 4.1, 5.1
and 7.1-channel congurations, the function of this port becomes Front Speaker Out.
Refer to the audio conguration table for the function of the audio ports in 2.1, 4.1, 5.1, or
7.1-channel conguration.
Audio 2.1, 4.1, 5.1, or 7.1-channel conguration
Port
Headset
2.1-
channel
4.1-channel 5.1-channel 7.1-channel
Light Blue (Rear panel) Line In Rear Speaker Out Rear Speaker Out Rear Speaker Out
Lime (Rear panel) Line Out Front Speaker Out Front Speaker Out Front Speaker Out
Pink (Rear panel) Mic In Mic In Bass/Center Bass/Center
Lime (Front panel) - - - Side Speaker Out
6. Microphone port (pink). This port connects to a microphone.
7. USB 3.0 ports 1 and 2. These two 9-pin Universal Serial Bus (USB) ports are for USB
3.0 devices.
• DO NOT connect a keyboard / mouse to any USB 3.0 port when installing Windows
®
operating system.
• Due to USB 3.0 controller limitations, USB 3.0 devices can only be used under a
Windows ®
OS environment and after USB 3.0 driver installation.
• USB 3.0 devices can only be used for data storage.
• We strongly recommend that you connect USB 3.0 devices to USB 3.0 ports for faster
and better performance from your USB 3.0 devices.
8. USB 2.0 ports 3~6. These two 4-pin Universal Serial Bus (USB) ports are for USB
2.0/1.1 devices.
9. Video Graphics Adapter (VGA) port. This 15-pin port is for a VGA monitor or other
VGA-compatible devices.
10. DVI-D port. This port is for any DVI-D compatible device. DVI-D can’t be converted to
output RGB Signal to CRT and is not compatible with DVI-I.
11. PS/2 keyboard port (purple).
This port is for a PS/2 keyboard.
To congure an 7.1-channel audio output:
Use a chassis with HD audio module in the front panel to support an 7.1-channel audio
output.
1-14 Chapter 1: Product introduction
•
For a fully congured system, we recommend that you use a power supply unit
(PSU) that complies with ATX 12V Specication 2.0 (or later version) and provides a
minimum power of 350W.
•
DO NOT forget to connect the 4-pin ATX +12V power plug. Otherwise, the system will
not boot up.
• We recommend that you use a PSU with higher power output when conguring a
system with more power-consuming devices or when you intend to install additional
devices. The system may become unstable or may not boot up if the power is
inadequate.
•
If you are uncertain about the minimum power supply requirement for your system,
refer to the Recommended Power Supply Wattage Calculator at http://support.asus.
com/PowerSupplyCalculator/PSCalculator.aspx?SLanguage=en-us for details.
1.7.2 Internal connectors
1. ATX power connectors (24-pin EATXPWR, 4-pin ATX12V)
These connectors are for ATX power supply plugs. The power supply plugs are
designed to t these connectors in only one orientation. Find the proper orientation and
push down rmly until the connectors completely t.
H81M-C
H81M-C ATX power connectors
2. TPM connector (20-1 pin TPM)
This connector supports a Trusted Platform Module (TPM) system, which securely
store keys, digital certicates, passwords and data. A TPM system also helps enhance
network security, protect digital identities, and ensures platform integrity.
H81M- C
H81M-C TPM Connector
The TPM module is purchased separately.
ASUS H81M-C 1-15
3. Front panel audio connector (10-1 pin AAFP)
This connector is for a chassis-mounted front panel audio I/O module that supports
either HD Audio or legacy AC`97 audio standard. Connect one end of the front panel
audio I/O module cable to this connector.
• We recommend that you connect a high-denition front panel audio module to this
connector to avail of the motherboard’s high-denition audio capability.
• If you want to connect a high-denition front panel audio module to this connector,
set the Front Panel Type item in the BIOS setup to [HD]. If you want to connect an
AC’97 front panel audio module to this connector, set the item to [AC97]. By default,
this connector is set to [HD]. See section for 2.6.7 Onboard Devices Conguration
details.
H81M- C
H81M-C Front panel audio connector
4. Intel® H81 Serial ATA 6.0Gb/s connector (7-pin SATA6G_1~2 [yellow])
This connector connects to Serial ATA 6.0 Gb/s hard disk drives via Serial ATA 6.0 Gb/s
signal cables.
• You must install Windows. XP Service Pack 3 or later version before using Serial ATA
hard disk drives.
• When using hot-plug and NCQ, set the SATA Mode Selection item in the BIOS to [AHCI].
See section 2.6.3 SATA Conguration for details.
H81M- C
H81M-C SATA 6.0Gb/s connectors
1-16 Chapter 1: Product introduction
6. CPU and chassis fan connectors (4-pin CPU_FAN, 4-pin CHA_FAN)
Connect the fan cables to the fan connectors on the motherboard, ensuring that the
black wire of each cable matches the ground pin of the connector.
Do not forget to connect the fan cables to the fan connectors. Insufcient air ow inside
the system may damage the motherboard components. These are not jumpers! Do not
place jumper caps on the fan connectors! The CPU_FAN connector supports a CPU fan of
maximum 1A (12 W) fan power.
Only the 4-pin CPU fan supports the ASUS Fan Xpert 2 feature.
H81M- C
H81M-C Fan connectors
5. Intel® H81 Serial ATA 3.0Gb/s connector (7-pin SATA3G_1~2)
This connector connects to Serial ATA 3.0 Gb/s hard disk drives via Serial ATA 3.0 Gb/s
signal cables.
• You must install Windows. XP Service Pack 3 or later version before using Serial ATA
hard disk drives.
• When using hot-plug and NCQ, set the SATA Mode Selection item in the BIOS to [AHCI].
H81M- C
H81M-C SATA 3.0Gb/s connectors
ASUS H81M-C 1-17
7. USB 2.0 connectors (10-1 pin USB910, USB1112)
These connectors are for USB 2.0 ports. Connect the USB module cable to any of
these connectors, then install the module to a slot opening at the back of the system
chassis. These USB connectors comply with USB 2.0 specications and supports up to
480Mbps connection speed.
Never connect a 1394 cable to the USB connectors. Doing so will damage the
motherboard!
The USB 2.0 module is purchased separately.
H81M- C
H81M-C USB2.0 connectors
PIN 1
USB+5V
USB_P11-
USB_P11+
GND
NC
USB+5V
USB_P12-
USB_P12+
GND
USB1112USB910
PIN 1
USB+5V
USB_P9-
USB_P9+
GND
NC
USB+5V
USB_P10-
USB_P10+
GND
8. Serial port connector (10-1 pin COM)
This connector is for a serial (COM) port. Connect the serial port module cable to this
connector, then install the module to a slot opening at the back of the system chassis.
The COM module is purchased separately.
H81M- C
H81M-C Serial port connectors
1-18 Chapter 1: Product introduction
9. System panel connector (10-1 pin PANEL)
This connector supports several chassis-mounted functions.
• System power LED (2-pin PWR_LED)
This 2-pin connector is for the system power LED. Connect the chassis power LED
cable to this connector. The system power LED lights up when you turn on the system
power, and blinks when the system is in sleep mode.
• Hard disk drive activity LED (2-pin HDD_LED)
This 2-pin connector is for the HDD Activity LED. Connect the HDD Activity LED cable
to this connector. The HDD LED lights up or ashes when data is read from or written
to the HDD.
• ATX power button/soft-off button (2-pin PWR_BTN)
This connector is for the system power button.
• Reset button (2-pin RESET)
This 2-pin connector is for the chassis-mounted reset button for system reboot without
turning off the system power.
H81M- C
PIN 1
PWR_BTN
PWR_LED+
PWR_LED-
PWR
GND
HDD_LED+
HDD_LED-
Ground
HWRST#
(NC)
F_PANEL
PWR_LED
+HDD_LED RESET
H81M-C System panel connector
10. Speaker connector (4-pin SPEAKER)
The 4-pin connector is for the chassis-mounted system warning speaker. The speaker
allows you hear system beeps and warnings.
H81M-C Speaker Out connector
+5V
GND
GND
Speaker Out
SPEAKER
PIN 1
H81M- C
ASUS H81M-C 1-19
1.8 Onboard LEDs
1. Standby Power LED
The motherboard comes with a standby power LED that lights up to indicate that the
system is ON, in sleep mode, or in soft-off mode. This is a reminder that you should
shut down the system and unplug the power cable before removing or plugging in any
motherboard component. The illustration below shows the location of the onboard LED.
ON OFF
H81M- C
H81M-C Onboard LED
1-20 Chapter 1: Product introduction
1.9 Software support
1.9.1 Installing an operating system
This motherboard supports Windows
® 7 (32bit/64bit) and Windows
® 8 (32bit/64bit) Operating
Systems (OS). Always install the latest OS version and corresponding updates to maximize
the features of your hardware.
Motherboard settings and hardware options vary. Refer to your OS documentation for
detailed information.
1.9.2 Support DVD information
The Support DVD that comes with the motherboard package contains the drivers, software
applications, and utilities that you can install to avail all motherboard features.
The contents of the Support DVD are subject to change at any time without notice. Visit the
ASUS website at www.asus.com for updates.
The following screen is for reference only.
To run the Support DVD
Place the Support DVD into the optical drive. If Autorun is enabled in your computer, the
DVD automatically displays the Specials screen which lists the unique features of your ASUS
motherboard. Click Drivers, Utilities, AHCI Driver, Manual, Contact and Specials tabs to
display their respective menus.
Click an item to install
Click an icon to
display Support
DVD/motherboard
information
If Autorun is NOT enabled in your computer, browse the contents of the Support DVD to
locate the le ASSETUP.EXE from the BIN folder. Double-click the ASSETUP.EXE to run
the DVD.
ASUS H81M-C 2-1
2.1 Managing and updating your BIOS
Save a copy of the original motherboard BIOS le to a USB ash disk in case you need to
restore the BIOS in the future. Copy the original motherboard BIOS using the ASUS Update
utility.
2.1.1 EZ Update
BIOS information
2
EZ Update is a utility that allows you to automatically update your motherboard’s softwares,
drivers and the BIOS version easily. With this utlity, you can also manually update the saved
BIOS and select a boot logo when the system goes into POST.
To launch EZ Update, click on the AI Suite 3 main menu bar.EZ Update
Click to automatically
update your
motherboard’s
driver, software and
rmware
Click to nd and
select the BIOS
from le
Click to select a
boot logo
Click to update
the BIOS
EZ Update requires an Internet connection either through a network or an ISP (Internet
Service Provider).
ASUS H81M-C 2-3
2.1.3 ASUS CrashFree BIOS 3 utility
The ASUS CrashFree BIOS 3 is an auto recovery tool that allows you to restore the BIOS le
when it fails or gets corrupted during the updating process. You can restore a corrupted BIOS
le using the motherboard support DVD or a USB ash drive that contains the updated BIOS
le.
• Before using this utility, rename the BIOS le in the removable device into
H81MC.CAP.
• The BIOS le in the support DVD may not be the latest version. Download the latest
BIOS le from the ASUS website at www.asus.com.
Recovering the BIOS
To recover the BIOS:
1. Turn on the system.
2. Insert the support DVD to the optical drive or the USB ash drive that contains the
BIOS le to the USB port.
3. The utility automatically checks the devices for the BIOS le. When found, the utility
reads the BIOS le and enters ASUS EZ Flash 2 utility automatically.
4. The system requires you to enter BIOS Setup to recover BIOS settings. To ensure
system compatibility and stability, we recommend that you press <F5> to load default
BIOS values.
DO NOT shut down or reset the system while updating the BIOS! Doing so can cause
system boot failure!
2.1.4 ASUS BIOS Updater
The ASUS BIOS Updater allows you to update BIOS in a DOS environment. This utility also
allows you to copy the current BIOS le that you can use as a backup when the BIOS fails or
gets corrupted during the updating process.
The succeeding utility screens are for reference only. The actual utility screen displays may
not be same as shown.
Before updating BIOS
1. Prepare the motherboard support DVD and a USB ash drive formatted using
FAT32/16 on a single partition.
2. Download the latest BIOS le and BIOS Updater from the ASUS website at
http://support.asus.com and save them on the USB ash drive.
NTFS is not supported under DOS environment. Do not save the BIOS le and BIOS
Updater to a hard disk drive or USB ash drive in NTFS format.
3. Turn off the computer and disconnect all SATA hard disk drives (optional).
2-4 Chapter 2: Getting started
Booting the system to a DOS environment
1. Insert the DOS-bootable USB ash drive with the latest BIOS le and BIOS Updater to
your computer’s USB port.
2. Boot your computer. When the ASUS Logo appears, press <F8> to show the
BIOS
Boot Device Select Menu.
3. Select the optical drive as the boot device. The DOS screen appears.
Updating the BIOS le
To update the BIOS le using BIOS Updater:
1. At the FreeDOS prompt, type
bupdater /pc /g and press <Enter>.
2. The BIOS Updater screen appears as below.
0305
H81M-C-ASUS-0214.CAP 8194 2013-04-08 15:25:48
06/08/2013
H81M-C
ASUSTek BIOS Updater for DOS V1.30
ASUS H81M-C 2-5
3. Press <Tab> to switch between screen elds and use the <Up/Down/Home/End> keys
to select the BIOS le and press <Enter>. BIOS Updater checks the selected BIOS le
and prompts you to conrm BIOS update.
4. Select Yes and press <Enter>. When BIOS update is done, press <ESC> to exit BIOS
Updater. Restart your computer.
DO NOT shut down or reset the system while updating the BIOS to prevent system boot
failure!
• For BIOS Updater version 1.30 or later, the utility automatically exits to the DOS
prompt after updating BIOS.
• Ensure to load the BIOS default settings to ensure system compatibility and stability.
Select the Load Optimized Defaults item under the Exit menu. Refer to section 2.10
Exit menu for details.
• Ensure to connect all SATA hard disk drives after updating the BIOS le if you have
disconnected them.
2-6 Chapter 2: Getting started
2.2 BIOS setup program
Use the BIOS Setup program to update the BIOS or congure its parameters. The BIOS
screens include navigation keys and brief online help to guide you in using the BIOS Setup
program.
Entering BIOS Setup at startup
To enter BIOS Setup at startup:
Press <Delete> during the Power-On Self Test (POST). If you do not press <Delete>,
POST continues with its routines.
Entering BIOS Setup after POST
To enter BIOS Setup after POST:
Press <Ctrl>+<Alt>+<Del> simultaneously.
Press the reset button on the system chassis.
Press the power button to turn the system off then back on. Do this option only if you
failed to enter BIOS Setup using the rst two options.
Using the power button, reset button, or the <Ctrl>+<Alt>+<Del> keys to force reset from a
running operating system can cause damage to your data or system. We recommend you
always shut down the system properly from the operating system.
• The BIOS setup screens shown in this section are for reference purposes only, and
may not exactly match what you see on your screen.
• Visit the ASUS website at www.asus.com to download the latest BIOS le for this
motherboard.
• Ensure that a USB mouse is connected to your motherboard if you want to use the
mouse to control the BIOS setup program.
• If the system becomes unstable after changing any BIOS setting, load the default
settings to ensure system compatibility and stability. Select the Load Optimized
Defaults 2.10 Exit Menu item under the Exit menu or press hotkey F5. See section
for details.
• If the system fails to boot after changing any BIOS setting, try to clear the CMOS and
reset the motherboard to the default value. See section for information 1.6 Jumpers
on how to erase the RTC RAM.
•
•
•
•
BIOS menu screen
The BIOS setup program can be used under two modes: and . EZ Mode Advanced Mode
You can change modes from the menu or from the Exit/Advanced Mode button in the EZ Exit
Mode/Advanced Mode screen.
ASUS H81M-C 2-7
• The boot device options vary depending on the devices you installed to the system.
• The Boot Menu(F8) button is available only when the boot device is installed to the
system.
Selects the boot
device priority Displays the system
properties of the
selected mode on the
right hand side
Normal mode
Selects the boot
device priority
Loads
optimized
default
Displays the CPU/motherboard
temperature, CPU voltage output,
and CPU/chassis fan speed
Selects the display language
of the BIOS setup program
Exits the BIOS setup program without
saving the changes, saves the changes
and resets the system, or enters the
Advanced Mode
ASUS Optimal
mode
Displays the
Advanced mode
menus
Selects the
Advanced
mode functions
Power saving
mode
Advanced Mode
The Advanced Mode provides advanced options for experienced end-users to congure the
BIOS settings. The gure below shows an example of the Advanced Mode. Refer to the
following sections for the detailed congurations.
To access the EZ Mode, click , then select or pressExit ASUS EZ Mode F7.
EZ Mode
By default, the EZ Mode screen appears when you enter the BIOS setup program. The EZ
Mode provides you an overview of the basic system information, and allows you to select
the display language, system performance mode and boot device priority. To access the
Advanced Mode, click Exit/Advanced Mode, then select Advanced Mode or press F7 for the
advanced BIOS settings.
The default screen for entering the BIOS setup program can be changed. Refer to the
Setup Mode 2.8 Boot menu item in section for details.
2-8 Chapter 2: Getting started
Navigation keys
General helpMenu bar
Submenu item
Conguration eldsMenu itemsBack button
Pop-up window
Scroll bar
Menu items
The highlighted item on the menu bar displays the specic items for that menu. For example,
selecting shows the Main menu items.Main
The other items (Ai Tweaker, Advanced, Monitor, Boot, Tool, and Exit) on the menu bar have
their respective menu items.
Back button
This button appears when entering a submenu. Press <Esc> or use the USB mouse to click
this button to return to the previous menu screen.
Last modied
settings Quick note
Menu bar
The menu bar on top of the screen has the following main items:
My Favorites For saving the frequently-used system settings and conguration
Main For changing the basic system conguration
Ai Tweaker For changing the overclocking settings
Advanced For changing the advanced system settings
Monitor For displaying the system temperature, power status, and changing the
fan settings
Boot For changing the system boot conguration
Tool For conguring options for special functions
Exit For selecting the exit options and loading default settings
ASUS H81M-C 2-9
Submenu items
A greater than sign (>) before each item on any menu screen means that the item has a
submenu. To display the submenu, select the item and press <Enter>.
Pop-up window
Select a menu item and press <Enter> to display a pop-up window with the conguration
options for that item.
Scroll bar
A scroll bar appears on the right side of a menu screen when there are items that do not t on
the screen. Press the Up/Down arrow keys or <Page Up> / <Page Down> keys to display the
other items on the screen.
Navigation keys
At the bottom right corner of the menu screen are the navigation keys for the BIOS setup
program. Use the navigation keys to select items in the menu and change the settings.
For the navigation key, it’s only available in English. If you delete the default shortcuts, they
will appear on your next system bootup.
General help
At the top right corner of the menu screen is a brief description of the selected item.
Conguration elds
These elds show the values for the menu items. If an item is user-congurable, you can
change the value of the eld opposite the item. You cannot select an item that is not
user-congurable.
A congurable eld is highlighted when selected. To change the value of a eld, select it and
press <Enter> to display a list of options.
Quick Note button
This button allows you to enter notes of the activities that you have done in BIOS.
• The Quick Note function does not support the following keyboard functions: delete,
cut, copy and paste.
• You can only use the English letters to type your notes.
Last Modied button
This button shows the items that you last modied and saved in BIOS Setup.
2-10 Chapter 2: Getting started
Adding items to My Favorites
To add frequently-used BIOS items to My Favorites:
1. Use the arrow keys to select an item that you want to add. When using a mouse, hover
the pointer to the item.
2. Press <F4> on your keyboard or right-click on your mouse to add the item to My
Favorites page.
You cannot add the following items to My Favorites:
• Items with submenu options
• User-congurable items such as language and boot device order
• Conguration items such as Memory SPD Information, system time and date
2.3 My Favorites
MyFavorites is your personal space where you can easily save and access your favorite
BIOS items.
ASUS H81M-C 2-11
2.4 Main menu
The Main menu screen appears when you enter the Advanced Mode of the BIOS Setup
program. The Main menu provides you an overview of the basic system information, and
allows you to set the system date, time, language, and security settings.
2.4.1 System Language [English]
Allows you to choose the BIOS language version from the options. Conguration options:
[English] [Español] [ ] [Русский
한국어]
2.4.2 System Date [Day xx/xx/xxxx]
Allows you to set the system date.
2.4.3 System Time [xx:xx:xx]
Allows you to set the system time.
2.4.4 Security
The Security menu items allow you to change the system security settings.
• If you have forgotten your BIOS password, erase the CMOS Real Time Clock (RTC)
RAM to clear the BIOS password. See section for information on how to 1.6 Jumpers
erase the RTC RAM.
• The Administrator User Password or items on top of the screen show the default
Not Installed. After you set a password, these items show .Installed
Administrator Password
If you have set an administrator password, we recommend that you enter the administrator
password for accessing the system. Otherwise, you might be able to see or change only
selected elds in the BIOS setup program.
To set an administrator password:
1. Select the
Administrator Password item and press <Enter>.
2. From the Create New Password box, key in a password, then press <Enter>.
2-12 Chapter 2: Getting started
3. Conrm the password when prompted.
To change an administrator password:
1. Select the
Administrator Password item and press <Enter>.
2. From the Enter Current Password box, key in the current password, then press
<Enter>.
3. From the Create New Password box, key in a new password, then press <Enter>.
4. Conrm the password when prompted.
To clear the administrator password, follow the same steps as in changing an administrator
password, but press <Enter> when prompted to create/conrm the password. After you clear
the password, the item on top of the screen shows .Administrator Password Not Installed
User Password
If you have set a user password, you must enter the user password for accessing the system.
The item on top of the screen shows the default . After you set User Password Not Installed
a password, this item shows .Installed
To set a user password:
1. Select the
User Password item and press <Enter>.
2. From the Create New Password box, key in a password, then press <Enter>.
3. Conrm the password when prompted.
To change a user password:
1. Select the
User Password item and press <Enter>.
2. From the Enter Current Password box, key in the current password, then press
<Enter>.
3. From the Create New Password box, key in a new password, then press <Enter>.
4. Conrm the password when prompted.
To clear the user password, follow the same steps as in changing a user password, but press
<Enter> when prompted to create/conrm the password. After you clear the password, the
User Password Not Installed item on top of the screen shows .
ASUS H81M-C 2-13
2.5 Ai Tweaker menu
The Ai Tweaker menu items allow you to congure overclocking-related items.
Be cautious when changing the settings of the Ai Tweaker menu items. Incorrect eld
values can cause the system to malfunction.
The conguration options for this section vary depending on the CPU and DIMM model you
installed on the motherboard.
Scroll down to display the following items:
Scroll down to display the following items:
2-14 Chapter 2: Getting started
Target CPU Turbo-Mode Speed : xxxxMHz
Displays the target CPU Turbo-Mode speed.
Target DRAM Speed : xxxxMHz
Displays the target DRAM speed.
Target Cache Speed : xxxxMHz
Displays the target Cache speed.
Target DMI/PEG Clock : xxxxMHz
Displays the target DMI/PEG clock.
Target CPU Graphics Speed : xxxxMHz
Displays the target iGPU speed.
2.5.1 ASUS MultiCore Enhancement [Auto]
[Auto] Default set to [Auto] for maximum performance under XMP/Manual/User-
dened memory frequency mode.
[Disabled] Allows you to set to default core ratio settings.
2.5.2 Ai Overclock Tuner [Auto]
Allows you to select the CPU overclocking options to achieve the desired CPU internal
frequency. Select any of these preset overclocking conguration options:
[Auto] Loads the optimal settings for the system.
[X.M.P.] Allows your system to automatically optimize the CPU ratio, BCLK
frequency, and memory parameters. If you install memory modules
supporting the eXtreme Memory Prole (X.M.P.) Technology, select this
item to set the proles supported by your memory modules for optimizing
the system performance.
2.5.3 CPU Core Ratio [Auto]
Allows you to set the CPU core ratio automatically or manually.
[Auto] Sets all CPU Core Ratio to Intel
® CPU default settings automatically.
[Sync All Cores] Allows you to set CPU Core Ratio settings for all cores.
[Per Core] Allows you to set CPU Core Ratio individually.
The following two items appear only when you set the to CPU Core Ratio [Sync All
Cores] [Per Core] or .
1-Core Ratio Limit [Auto]
Allows you to set the 1-Core Ratio Limit. Select [Auto] to apply the CPU default Turbo
Ratio setting or manually assign a 1-Core Ratio Limit value that is higher than or equal
to the 2-Core Ratio Limit.
ASUS H81M-C 2-15
2-Core Ratio Limit [Auto]
This item becomes congurable only when you set CPU Core Ratio to [Per Core] and
allows you to set the 2-Core Ratio Limit. Select [Auto] to apply the CPU default Turbo
Ratio setting or manually assign a 2-Core Ratio Limit value that is higher than or equal
to the 3-Core Ratio Limit. 1-Core Limit must not be set to [Auto].
3-Core Ratio Limit [Auto]
This item becomes congurable only when you set CPU Core Ratio to [Per Core] and
allows you to set the 3-Core Ratio Limit. Select [Auto] to apply the CPU default Turbo
Ratio setting or manually assign a 3-Core Ratio Limit value that is higher than or equal
to the 4-Core Ratio Limit. 1-Core/2-Core Ratio Limit must not be set to [Auto].
4-Core Ratio Limit [Auto]
This item becomes congurable only when you set CPU Core Ratio to [Per Core] and
allows you to set the 4 Core Ratio Limit. Select [Auto] to apply the CPU default Turbo
Ratio setting or manually assign a 4-Core Ratio Limit value that is higher than or equal
to the 3-Core Ratio Limit. 1-Core/2-Core/3-Core Limit must not be set to [Auto].
2.5.4 Min CPU Cache Ratio [Auto]
Allows you to set the uncore ratio of the processor to its possible minimum value.
Conguration options: [Auto] [1] ~ [30].
2.5.5 Max CPU Cache Ratio [Auto]
Allows you to set the uncore ratio of the processor to its possible maximum value.
Conguration options: [Auto] [1] ~ [30].
2.5.6 BCLK Frequency : DRAM Frequency Ratio [Auto]
Allows you to set the BCLK frequency to DRAM frequency ratio.
[Auto] DRAM frequency is set to the optimized settings.
[100:133] The BCLK frequency to DRAM frequency ratio is set to 100:133.
[100:100] The BCLK frequency to DRAM frequency ratio is set to 100:100.
2.5.7 DRAM Frequency [Auto]
Allows you to set the memory operating frequency. The conguration options vary with the
BCLK/PEG Frequency item settings.
Selecting a very high memory frequency may cause the system to become unstable! If this
happens, revert to the default setting.
2.5.8 Max. CPU Graphics Ratio [Auto]
[Auto] The iGPU frequency is set to its optimized setting depending on the system
loading.
[Manaul] Use the <+> or <-> keys to adjust the optimal iGPU frequency value. The
frequency may vary depending on the system loading.
2-16 Chapter 2: Getting started
2.5.9 GPU Boost [As is]
Allows you to enable the GPU Boost to accelerate the integrated GPU for extreme graphics
performance. Conguration options: [As is] [Enabled].
2.5.10 EPU Power Saving Mode [Auto]
Allows you to enable or disable the EPU power saving function. Conguration options: [Auto]
[Disabled] [Enabled]
2.5.11 DRAM Timing Control
The subitems in this menu allow you to set the DRAM timing control features. Use the <+>
and <-> keys to adjust the value. To restore the default setting, type [auto] using the keyboard
and press the <Enter> key.
Changing the values in this menu may cause the system to become unstable! If this
happens, revert to the default settings.
Primary Timings
DRAM CAS# Latency [Auto]
Conguration options: [Auto] [1 DRAM Clock] – [31 DRAM Clock]
DRAM RAS# to CAS# Delay [Auto]
Conguration options: [Auto] [1 DRAM Clock] – [31 DRAM Clock]
DRAM RAS# PRE Time [Auto]
Conguration options: [Auto] [1 DRAM Clock] – [31 DRAM Clock]
DRAM RAS# ACT Time [Auto]
Conguration options: [Auto] [1 DRAM Clock] – [63 DRAM Clock]
DRAM COMMAND Rate [Auto]
Conguration options: [Auto] [1 DRAM Clock] [2 DRAM Clock] [3 DRAM Clock]
Secondary Timings
DRAM RAS# to RAS# Delay [Auto]
Conguration options: [Auto] [1 DRAM Clock] – [15 DRAM Clock]
DRAM REF Cycle Time [Auto]
Conguration options: [Auto] [1 DRAM Clock] – [511 DRAM Clock]
DRAM Refresh Interval [Auto]
Conguration options: [Auto] [1 DRAM Clock] – [65535 DRAM Clock]
DRAM WRITE Recovery Time [Auto]
Conguration options: [Auto] [1 DRAM Clock] – [16 DRAM Clock]
DRAM READ to PRE Time [Auto]
Conguration options: [Auto] [1 DRAM Clock] – [15 DRAM Clock]
DRAM FOUR ACT WIN Time [Auto]
Conguration options: [Auto] [1 DRAM Clock] – [255 DRAM Clock]
ASUS H81M-C 2-17
DRAM WRITE to READ Delay [Auto]
Conguration options: [Auto] [1 DRAM Clock] – [15 DRAM Clock]
DRAM CKE Minimum pulse width [Auto]
Conguration options: [Auto] [1 DRAM Clock] – [15 DRAM Clock]
DRAM CAS# Write Latency [Auto]
Conguration options: [Auto] [1 DRAM Clock] – [31 DRAM Clock]
RTL IOL control
DRAM RTL Initial Value [Auto]
Conguration options: [Auto] [1 DRAM Clock] – [63 DRAM Clock]
DRAM RTL (CHA) [Auto]
Conguration options: [Auto] [1 DRAM Clock] – [63 DRAM Clock]
DRAM RTL (CHB) [Auto]
Conguration options: [Auto] [1 DRAM Clock] – [63 DRAM Clock]
DRAM IO-L (CHA) [Auto]
Conguration options: [Auto] [Delay 1 Clock] - [Delay 15 Clock]
DRAM IO-L (CHB) [Auto]
Conguration options: [Auto] [Delay 1 Clock] - [Delay 15 Clock]
Third Timings
tRDRD [Auto]
Conguration options: [Auto] [1 DRAM Clock] – [7 DRAM Clock]
tRDRD_dr [Auto]
Conguration options: [Auto] [1 DRAM Clock] – [15 DRAM Clock]
tRDRD_dd [Auto]
Conguration options: [Auto] [1 DRAM Clock] – [15 DRAM Clock]
tWRRD [Auto]
Conguration options: [Auto] [1 DRAM Clock] – [63 DRAM Clock]
tWRRD_dr [Auto]
Conguration options: [Auto] [1 DRAM Clock] – [15 DRAM Clock]
tWRRD_dd [Auto]
Conguration options: [Auto] [1 DRAM Clock] – [15 DRAM Clock]
tWRWR [Auto]
Conguration options: [Auto] [1 DRAM Clock] – [7 DRAM Clock]
tWRWR_dr [Auto]
Conguration options: [Auto] [1 DRAM Clock] – [15 DRAM Clock]
tWRWR_dd [Auto]
Conguration options: [Auto] [1 DRAM Clock] – [15 DRAM Clock]
Dec_WRD [Auto]
Conguration options: [Auto] [0] [1]
tRDWR [Auto]
Conguration options: [Auto] [1 DRAM Clock] – [31 DRAM Clock]
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tRDWR_dr [Auto]
Conguration options: [Auto] [1 DRAM Clock] – [31 DRAM Clock]
tRDWR_dd [Auto]
Conguration options: [Auto] [1 DRAM Clock] – [31 DRAM Clock]
MISC
MRC Fast Boot [Auto]
Allows you to enable, disable or automatically set the MRC fast boot.
Conguration options: [Auto] [Enable] [Disable]
DRAM CLK Period [Auto]
Conguration options: [Auto] [1] – [14]
Channel A DIMM Control [Enable Bot...]
Conguration options: [Enable Both DIMMS] [Disable DIMM0] [Disable DIMM1]
[Disable Both DIMMS]
Channel B DIMM Control [Enable Bot...]
Conguration options: [Enable Both DIMMS] [Disable DIMM0] [Disable DIMM1]
[Disable Both DIMMS]
Scrambler Setting [Optimized ...]
Conguration options: [Optimized (ASUS)] [Default (MRC)]
2.5.12 CPU Power Management
The subitems in this menu allow you to set the CPU ratio and features.
Enhanced Intel® SpeedStep Technology [Enabled]
Allows you to enable or disable the Enhanced Intel
® SpeedStep Technology (EIST).
[Disabled] Disables this function.
[Enabled] The operating system dynamically adjusts the processor voltage and
core frequency which may result in decreased average consumption and
decreased average heat production.
Turbo Mode [Enabled]
Allows you to enable your core processor’s speed to run faster than the marked frequency in
a specic condition. Conguration options: [Disabled] [Enabled]
• Turbo Mode is only available on selected CPU models only.
• The following rst three items appear only when you set the Turbo Mode to
[Enabled].
Turbo Mode Parameters
Long Duration Package Power Limit [Auto]
Allows you to limit the turbo ratio’s long duration package power.
Use the <+> and <-> keys to adjust the value.
2-20 Chapter 2: Getting started
CPU Internal Power Saving Control
Power Saving Level 1 Threshhold [Auto]
Allows you to set the power saving level 1 threshhold.
Use the <+> and <-> keys to adjust the value.
Power Saving Level 2 Threshhold [Auto]
Allows you to set the power saving level 2 threshhold.
Use the <+> and <-> keys to adjust the value.
Power Saving Level 3 Threshhold [Auto]
Allows you to set the power saving level 3 threshhold.
Use the <+> and <-> keys to adjust the value.
2.5.13 CPU Core Voltage [Auto]
Allows you to congure the amount of voltage fed to the cores of the processor. Increase the
amount of voltage when increasing core frequency. Conguration options: [Auto] [Manual
Mode] [Offset Mode]
CPU Core Voltage Override [Auto]
This item appears only when you set the CPU Core Voltage to [Manual Mode] and allows you
to set the CPU core voltage override. The values range from 0.001V to 1.920V with a 0.001V
interval.
Offset Mode Sign [+]
This item appears only when you set the CPU Core Voltage to [Offset Mode] and allows you
to set the offset mode sign. Conguration options: [+] [-]
CPU Core Voltage Offset [Auto]
This item appears only when you set the CPU Core Voltage to [Offset Mode] and
allows you to set the CPU core voltage offset. The values range from 0.001V to 0.999V
with a 0.001V interval.
2.5.14 CPU Cache Voltage [Auto]
This item allows you to set the CPU cache voltage. Increase the cache voltage when
increasing the ring frequency. Conguration options: [Auto] [Manual Mode] [Offset Mode].
CPU Cache Voltage Override [Auto]
This item appears only when you set the CPU Cache Voltage to [Manual Mode] and allows
you to set the CPU cache voltage override. The values range from 0.001V to 1.920V with a
0.001V interval.
Offset Mode Sign [+]
This item appears only when you set the CPU Cache Voltage to [Offset Mode] and allows you
to set the offset mode sign. Conguration options: [+] [-]
CPU Cache Voltage Offset [Auto]
This item appears only when you set the CPU Cache Voltage to [Offset Mode] and
allows you to set the CPU cache voltage offset. The values range from 0.001V to
0.999V with a 0.001V interval.
ASUS H81M-C 2-21
2.5.15 CPU Graphics Voltage [Auto]
This item allows you to set the CPU graphics voltage. Increase the graphics voltage when
increasing the iGPU frequency. Conguration options: [Auto] [Manual Mode] [Offset Mode]
[Adaptive Mode].
CPU Graphics Voltage Override [Auto]
This item appears only when you set the CPU Graphics Voltage to [Manual Mode] and allows
you to set the CPU graphics voltage override. The values range from 0.001V to 1.920V with
a 0.001V interval.
Offset Mode Sign [+]
This item appears only when you set the CPU Graphics Voltage to [Offset Mode] or [Adaptive
Mode] and allows you to set the offset mode sign. Conguration options: [+] [-]
CPU Graphics Voltage Offset [Auto]
This item appears only when you set the CPU Graphics Voltage to [Offset Mode] or
[Adaptive Mode] and allows you to set the CPU graphics voltage offset. The values
range from 0.001V to 0.999V with a 0.001V interval.
Additional Turbo Mode CPU Graphics Voltage [Auto]
This item appears only when you set the CPU Graphics Voltage to [Adaptive Mode] and
allows you to set the additional turbo mode CPU graphics voltage. The values range from
0.001V to 1.920V with a 0.001V interval.
Total Adaptive Mode CPU Graphics Voltage [Auto]
This item appears only when you set the CPU Graphics Voltage to [Adaptive Mode] and
allows you to set the total adaptive mode CPU graphics voltage. The values range from
0.001V to 1.920V with a 0.001V interval.
2.5.16 CPU System Agent Voltage Offset Mode Sign [+]
This item allows you to set the CPU system agent voltage offset mode sign. Conguration
options: [+] [-].
CPU System Agent Voltage Offset [Auto]
This item allows you to set the CPU system agent voltage offset. Increase the value when
increasing DRAM frequency. The values range from 0.001V to 0.999V with a 0.001V interval.
2.5.17 CPU Analog I/O Voltage Offset Mode Sign [+]
This item allows you to set the CPU analog I/O voltage offset mode sign. Conguration
options: [+] [-].
CPU Analog I/O Voltage Offset [Auto]
This item allows you to set the CPU analog I/O voltage offset. Increase the value when
increasing DRAM frequency. The values range from 0.001V to 0.999V with a 0.001V interval.
2-22 Chapter 2: Getting started
2.5.18 CPU Digital I/O Voltage Offset Mode Sign [+]
This item allows you to set the CPU digital I/O voltage offset mode sign. Conguration
options: [+] [-].
CPU Digital I/O Voltage Offset [Auto]
This item allows you to set the CPU digital I/O voltage offset. Increase the value when
increasing DRAM frequency. The values range from 0.001V to 0.999V with a 0.001V interval.
2.5.19 SVID Control [Auto]
Disabling SVID Support stops the processor from commmunicating with the external voltage
regulator. Conguration options: [Auto] [Disabled] [Enabled].
• We recommend that you disable this function when overclocking.
• The following item appears only when you set SVID Support to
[Enabled].
2.5.20 DRAM Voltage [Auto]
Allows you to set the DRAM Voltage. The values range from 1.500V to 1.650V with a 0.05V
interval.
According to Intel CPU specications, DIMMs with voltage requirement over 1.65V may
damage the CPU permanently. We recommend that you install the DIMMs with the voltage
requirement below 1.65V.
2.6 Advanced menu
The Advanced menu items allow you to change the settings for the CPU and other system
devices.
Be cautious when changing the settings of the Advanced menu items. Incorrect eld values
can cause the system to malfunction.
ASUS H81M-C 2-23
2.6.1 CPU Conguration
The items in this menu show the CPU-related information that the BIOS automatically
detects.
The items shown in submenu may be different due to the CPU you installed.
Intel® Adaptive Thermal Monitor [Enabled]
[Enabled] Enables the overheated CPU to throttle its clock speed to cool down.
[Disabled] Disables the CPU thermal monitor function.
Hyper-threading [Enabled]
The Intel Hyper-Threading Technology allows a hyper-threading processor to appear as two
logical processors to the operating system, allowing the operating system to schedule two
threads or processes simultaneously.
[Enabled] Two threads per activated core are enabled.
[Disabled] Only one thread per activated core is enabled.
Active Processor Cores [All]
Allows you to choose the number of CPU cores to activate in each processor package.
Conguration options: [All] [1] [2] [3]
Limit CPUID Maximum [Disabled]
[Enabled] Allows legacy operating systems to boot even without support for CPUs
with extended CPUID functions.
[Disabled] Disables this function.
Execute Disable Bit [Enabled]
[Enabled] Enables the No-Execution Page Protection Technology.
[Disabled] Forces the XD feature ag to always return to zero (0).
Intel Virtualization Technology [Disabled]
[Enabled] Allows a hardware platform to run multiple operating systems separately
and simultaneously, enabling one system to virtually function as several
systems.
[Disabled] Disables this function.
Hardware Prefetcher [Enabled]
[Enabled] Allows a hardware platform to automatically analyze the requirements and
prefetch data and codes for the CPU.
[Disabled] Disables this function.
Adjacent Cache Line Prefetch [Enabled]
[Enabled] Allows a hardware platform to perform adjacent cache line prefetching.
[Disabled] Disables this function.
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Boot performance mode [Max Non-Tu...]
This item allows you to select the boot performance mode. Conguration options: [Max Non-
Turbo Performance] [Max battery] [Turbo Performance]
CPU Power Management Conguration
This item allows you to manage and congure the CPU’s power.
EIST [Enabled]
Allows you to enable or disable the Enhanced Intel
® SpeedStep Technology (EIST).
[Disabled] The CPU runs at its default speed.
[Enabled] The operating system controls the CPU speed.
Turbo Mode [Enabled]
Allows you to set the processor cores to run faster than the marked frequency in a
specic condition. Conguration options: [Enabled] [Disabled]
Turbo Mode is only available on selected CPU models only.
CPU C states [Auto]
[Auto] Automatic conguration.
[Enabled] Enables the CPU C states.
[Disabled] Disables the CPU C states.
The following items appear only when you set the CPU C states to .[Enabled]
Enhanced C1 state [Enabled]
[Enabled] Enables enhanced C1 state.
[Disabled] Disables enhanced C1 state.
CPU C3 Report [Enabled]
Allows you to disable or enable the CPU C3 report to OS. Conguration options:
[Enabled] [Disabled]
CPU C6 report [Enabled]
Allows you to disable or enable the CPU C6 report to OS. Conguration options:
[Enabled] [Disabled]
C6 Latency [Short]
Allows you to choose short or long latency for C6. Conguration options: [Short] [Long]
CPU C7 report [CPU C7s]
Allows you to disable or enable the CPU C7 report to OS. Conguration options:
[Disabled] [CPU C7] [CPU C7s]
C7 Latency [Long]
Allows you to choose short or long latency for C6. Conguration options: [Short] [Long]
ASUS H81M-C 2-25
Package C State Support [Auto]
Allows you to disable or enable the whole C-State package support. Conguration
options: [Auto] [Enabled] [C0/C1] [C2] [C3] [C6] [CPU C7] [CPU C7s]
2.6.2 PCH Conguration
PCI Express Conguration
DMI Link ASPM Control [Auto]
Allows you to control the Active State Power Managemennt on both NB and SB side of
the DMI Link. Conguration options: [Auto] [Enabled] [Disabled]
ASPM Support [Disabled]
Allows you to set the ASPM support. Conguration options: [Disabled] [Auto] [L0s] [L1]
L0sL1].
PCIe Speed [Auto]
Allows you to select the PCI Express port speed. Conguration options: [Auto] [Gen1]
[Gen2]
Intel® Rapid Start Technology
Intel® Rapid Start Technology [Disabled]
Allows you to enable or disable Intel
® Rapid Start Technology. Conguration options:
[Enabled] [Disabled]
The following items appear only when you set the Intel
® Rapid Start Technology to
[Enabled].
Entry on S3 RTC Wake [Enabled]
The system automatically wakes up and set to Rapid Start Technology S4 mode.
Conguration options: [Enabled] [Disabled]
Entry After [x]
Allows you to set the wake-up time.The values range from 0 (immediately) to 120.
Active Page Threshold Support [Enabled]
The system automatically set itself to sleep when the partition size is not enough for
Rapid Start Technology to work. Conguration options: [Enabled] [Disabled]
Active Memory Threshold [0]
Key in the value for the additional partition size for Rapid Start Technology to work.
Ensure that the caching partition size is larger than the total memory size.
Hybrid Hard Disk Support [Disabled]
Allows you to enable or disable hybrid hard disk support.
Conguration options: [Enabled] [Disabled]
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Intel® Smart Connect Technology [Disabled]
ISCT Support [Disabled]
Allows you to enable or disable the ISCT support. Conguration options: [Enabled]
[Disabled]
2.6.3 SATA Conguration
While entering Setup, the BIOS automatically detects the presence of SATA devices. The
SATA Port items show Not Present if no SATA device is installed to the corresponding SATA
port.
SATA Mode Selection [AHCI]
Allows you to set the SATA conguration.
[Disabled] Disables the SATA function.
[IDE] Set to [IDE] when you want to use the Serial ATA hard disk drives as
Parallel ATA physical storage devices.
[AHCI] Set to [AHCI] when you want the SATA hard disk drives to use the AHCI
(Advanced Host Controller Interface). The AHCI allows the onboard storage
driver to enable advanced Serial ATA features that increases storage
performance on random workloads by allowing the drive to internally
optimize the order of commands.
Aggressive LPM Support [Auto]
This item appears only when you set the previous item to [AHCI] and allows you to enable or
disable PCH entering link power state aggressively. Conguration options: [Auto] [Disabled]
[Enabled]
IDE Legacy / Native Mode Selection [Native]
This item appears only when you set the SATA Mode Selection item to [IDE]. Conguration
options: [Native] [Legacy]
S.M.A.R.T. Status Check [Enabled]
S.M.A.R.T. (Self-Monitoring, Analysis and Reporting Technology) is a monitor system. When
read/write of your hard disk errors occur, this feature allows the hard disk to report warning
messages during the POST. Conguration options: [Enabled] [Disabled]
Hot Plug [Disabled]
These items appear only when you set the SATA Mode Selection item to [AHCI] and allow
you to enable/disable SATA Hot Plug Support. Conguration options: [Disabled] [Enabled]
2.6.4 System Agent Conguration
VT-d [Disabled]
Allows you to enable or disable VT-d function on MCH. Conguration options: [Enabled]
[Disabled]
CPU Audio Device [Disabled]
Allows you to enable or disable CPU SA Audio Device. Conguration options: [Enabled]
[Disabled]
ASUS H81M-C 2-27
Graphics Conguration
Allows you to select a primary display from iGPU, and PCIe graphical devices.
Primary Display [Auto]
Allows you to select which of the iGPU/PCIE Graphics device should be the Primary
Display. Conguration options: [Auto] [iGPU] [PCIE] [PCI]
iGPU Memory [Auto]
Allows you to select the amount of system memory allocated to DVMT 5.0 used by the
iGPU. Conguration options: [Auto] [32M] [64M] [96M] [128M] [160M] [192M] [224M]
[256M] [288M][320M] [352M] [384M] [416M] [448M] [480M] [512M] [1024M]
Render Standby [Auto]
Allows you to enable or disable Intel
® Graphics Render Standby support to reduce
iGPU power use when the system is idle. Conguration options: [Auto] [Disabled]
[Enabled]
iGPU Multi-Monitor [Disabled]
Set this item to [Enabled] to empower both integrated and discrete graphics for
multiple-monitor output. The iGPU shared system memory size will be xed at 64MB.
Conguration options: [Disabled] [Enabled]
DMI Conguration
Allows you to control various DMI functions.
DMI Gen 2 [Auto]
Allows you to enable or disable DMI Gen 2. Conguration options: [Auto] [Enabled]
[Disabled]
NB PCIe Conguration
Allows you to congure the NB PCI Express settings.
PCIEX16_1 Link Speed [Auto]
Allows you to congure the PCIEX16_1 speed. Conguration options: [Auto] [Gen1]
[Gen2]
DMI Link ASPM Control [Auto]
Allows you to enable or disable the control of Active State Power Management on SA
side of the DMI Link. Conguration options: [Auto] [Disabled] [L0s] [L1] [L0sL1]
PEG - ASPM [Disabled]
Allows you to control ASPM support for the PEG Device. The setting takes no effect if
PEG is not the active device at present. Conguration options: [Disabled] [Auto] [ASPM
L0s] [ASPM L1] [ASPM L0sL1]
Memory Conguration
Memory Scrambler [Enabled]
Allows you to enable or disable Memory Scrambler support.
Memory Remap [Enabled]
Allows you to enable or disable remapping the memory above 4GB.
[Enabled] Enables the function.
[Disabled] Disables this function.
2-28 Chapter 2: Getting started
2.6.5 USB Conguration
The items in this menu allow you to change the USB-related features.
The item shows the auto-detected values. If no USB device is detected, the USB Devices
item shows None.
Legacy USB Support [Enabled]
[Disabled] The USB devices can be used only for the BIOS setup program.
[Enabled] Enables the support for USB devices on legacy operating systems (OS).
[Auto] Allows the system to detect the presence of USB devices at startup. If
detected, the USB controller legacy mode is enabled. If no USB device is
detected, the legacy USB support is disabled.
Intel xHCI Mode [Smart Auto]
[Smart Auto] Enables the operation of xHCI controller.
[Auto] Keeps the last operation of xHCI controller in OS during bootup.
[Enabled] Enables the function.
[Disabled] Disables the function.
EHCI Hand-off [Disabled]
[Enabled] Enables the support for operating systems without an EHCI hand-off
feature.
[Disabled] Disables the function.
USB Single Port Control
USB3_1~2 [Enabled]
Allows you to enable or disable an individual USB port. Refer to the section 1.2.3
Motherboard layout in this user manual for the locations of the USB ports.
Conguration options: [Enabled] [Disabled].
USB_3~6, 9~12 [Enabled]
Allows you to enable or disable an individual USB port. Refer to the section 1.2.3
Motherboard layout in this user manual for the locations of the USB ports.
Conguration options: [Enabled] [Disabled].
2.6.6 Platform Misc Conguration
The items in this menu allow you to congure the Platform Misc.
PCI Express Native Power Management [Disabled]
Allows you to enhance the power saving feature of PCI Express and perform ASPM
operations in the operating system. Conguration options: [Disabled] [Enabled]
Native ASPM [Disabled]
The item appears only when you set the previous item to [Enabled] and allows you to enable
or disable ASPM. Conguration options: [Enabled] [Disabled]
ASUS H81M-C 2-29
2.6.7 Onboard Devices Conguration
HD Audio Controller [Enabled]
[Enabled] Enables the HD Audio Device.
[Disabled] Disables the HD Audio Device.
The following two items appear only when you set the item to HD Audio Controller
[Enabled].
Front Panel Type [HD]
Allows you to set the front panel audio connector (AAFP) mode to legacy AC’97 or high-
denition audio depending on the audio standard that the front panel audio module supports.
[HD] Sets the front panel audio connector (AAFP) mode to high denition audio.
[AC97] Sets the front panel audio connector (AAFP) mode to legacy AC’97
Realtek LAN Controller [Enabled]
[Enabled] Enables the Realtek LAN controller.
[Disabled] Disables the controller.
Realtek PXE Option Rom [Disabled]
This item appears only when you set the previous item to [Enabled] and allows you to
enable or disable the PXE OptionRom of the Realtek LAN controller. Conguration options:
[Enabled] [Disabled]
Serial Port Conguration
The sub-items in this menu allow you to set the serial port conguration.
Serial Port [Enabled]
Allows you to enable or disable the serial port (COM).Conguration options: [Enabled]
[Disabled]
Change Settings [IO=3F8h; IRQ=4]
This item appears only when you set the to [Enabled] and allows you Serial Port
to select the Serial Port base address. Conguration options: [IO=3F8h; IRQ=4]
[IO=2F8h; IRQ=3] [IO=3E8h; IRQ=4] [IO=2E8h; IRQ=3]
Parallel Port Conguration
The sub-items in this menu allow you to set the parallel port conguration.
Parallel Port [Enabled]
Allows you to enable or disable the parallel port (LPT/LPTE).
Conguration options: [Enabled] [Disabled]
The following items appear only when you set the item to Parallel Port Conguration
[Enabled].
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Change Settings [Auto]
Allows you to select an optimal setting for Super I/O devices. Conguration
options: [Auto] [IO=378h; IRQ=5;] [IO=378h; IRQ=5,6,7,9,10,11,12;] [IO=278h;
IRQ=5,6,7,9,10,11,12;] [IO=3BCh; IRQ=5,6,7,9,10,11,12;]
Device Mode [STD Printe...]
Allows you to select the Printer Port mode. Conguration options: [STD Printer Mode]
[SPP Mode] [EPP-1.9 and SPP Mode] [EPP-1.7 and SPP Mode] [ECP Mode] [ECP and
EPP 1.9 Mode] [ECP and EPP 1.7 Mode]
2.6.8 APM
Restore AC Power Loss [Power Off]
[Power On] The system goes into on state after an AC power loss.
[Power Off] The system goes into off state after an AC power loss.
[Last State] The system goes into either off or on state, whatever the system state was
before the AC power loss.
Power On By PS/2 Keyboard [Disabled]
[Disabled] Disables the Power On by a PS/2 keyboard.
[Space Bar] Sets the Space Bar on the PS/2 keyboard to turn on the system.
[Ctrl-Esc] Sets the Ctrl+Esc key on the PS/2 keyboard to turn on the system.
[Power Key] Sets Power key on the PS/2 keyboard to turn on the system. This feature
requires an ATX power supply that provides at least 1A on the +5VSB lead.
Power On By PS/2 Mouse [Disabled]
[Disabled] Disables the Power On by a PS/2 mouse.
[Enabled] Enables the Power On by a PS/2 mouse. This feature requires an ATX
power supply that provides at least 1A on the +5VSB lead.
Power On By PCIE/PCI [Disabled]
[Disabled] Disables the PCIE/PCI devices to generate a wake-on-LAN feature of the
Intel®/Realtek LAN device.
[Enabled] Enables the PCIE/PCI devices to generate a wake-on-LAN feature of the
Intel®/Realtek LAN device.
Power On By Ring [Disabled]
[Disabled] Disables Ring to generate a wake event.
[Enabled] Enables Ring to generate a wake event.
Power On By RTC [Disabled]
[Disabled] Disables RTC to generate a wake event.
[Enabled] When set to [Enabled], the items RTC Alarm Date (Days) Hour/ and
Minute/Second will become user-congurable with set values.
ASUS H81M-C 2-31
2.6.9 Network Stack Conguration
Network Stack [Disabled]
This item allows user to disable or enable the UEFI network stack. Conguration options:
[Disabled] [Enabled]
The following two items appear only when you set the previous item to [Enabled].
Ipv4 PXE Support [Enabled]
This item allows user to disable or enable the Ipv4 PXE Boot support. Conguration options:
[Disabled] [Enabled]
Ipv6 PXE Support [Enabled]
This item allows user to disable or enable the Ipv6 PXE Boot support. Conguration options:
[Disabled] [Enabled]
2.7 Monitor menu
The Monitor menu displays the system temperature/power status, and allows you to change
the fan settings.
Scroll down to display the following items:
ASUS H81M-C 2-33
CPU Lower Temperature [20]
Displays the lower limit of the CPU temperature.
CPU Fan Min. Duty Cycle(%) [20]
Use the <+> and <-> keys to adjust the minimum CPU fan duty cycle. The values
range from 20% to 100%. When the CPU temperature is under the lower limit, the CPU
fan will operate at the minimum duty cycle.
2.7.5 Chassis Q-Fan Control [Enabled]
[Disabled] Disables the Chassis Q-Fan control feature.
[Enabled] Enables the Chassis Q-Fan control feature.
Chassis Fan Speed Low Limit [600 RPM]
This item appears only when you enable the Chassis Q-Fan Control feature and allows you
to disable or set the chassis fan warning speed.
Conguration options: [Ignore] [200RPM] [300 RPM] [400 RPM] [500 RPM] [600 RPM]
Chassis Fan Prole [Standard]
This item appears only when you enable the Chassis Q-Fan Control feature and allows you
to set the appropriate performance level of the chassis fan.
[Standard] Sets to [Standard] to make the chassis fan automatically adjust depending
on the chassis temperature.
[Silent] Sets to [Silent] to minimize the fan speed for quiet chassis fan operation.
[Turbo] Sets to [Turbo] to achieve maximum chassis fan speed.
[Manual] Sets to [Manual] to assign detailed fan speed control parameters.
The following four items appear only when you set Chassis Fan Prole to [Manual].
Chassis Upper Temperature [70]
Use the <+> and <-> keys to adjust the upper limit of the chassis temperature. The
values range from 40ºC to 75ºC.
Chassis Fan Max. Duty Cycle(%) [100]
Use the <+> and <-> keys to adjust the maximum chassis fan duty cycle. The values
range from 60% to 100%. When the chassis temperature reaches the upper limit, the
chassis fan will operate at the maximum duty cycle.
Chassis Lower Temperature [40]
Displays the lower limit of the chassis temperature.
Chassis Fan Min. Duty Cycle(%) [60]
Use the <+> and <-> keys to adjust the minimum chassis fan duty cycle. The values
range from 60% to 100%. When the chassis temperature is under 40ºC, the chassis
fan will operate at the minimum duty cycle.
2.7.6 Anti Surge Support [Disabled]
This item allows you to enable or disable the Anti Surge function.
Conguration options: [Disabled] [Enabled]
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2.8 Boot menu
The Boot menu items allow you to change the system boot options.
Scroll down to display the following items:
2.8.1 Fast Boot [Enabled]
[Enabled] Select to accelerate the boot speed.
[Disabled] Select to go back to normal boot.
The following ve items appear when you set Fast Boot to [Enabled].
SATA Support [All Devices]
[All Devices] All devices connected to SATA ports will be available during
POST. This process will extend the POST time.
[Hard Drive Only] Only hard drives connected to SATA ports will be detected during
POST. Any hardware change will disable fast boot.
[Boot Drive Only] Only boot drive connected to SATA ports will be detected during
POST. Any hardware change will disable fast boot.
ASUS H81M-C 2-35
USB Support [Partial In...]
[Disabled] All USB devices will not be available until OS boot up for a
fastest POST time.
[Full Initialization] All USB devices will be available during POST. This process will
extend the POST time.
[Partial Initialization] For a faster POST time, only the USB ports with keyboard and
mouse connections will be detected.
PS/2 Keyboard and Mouse Support [Auto]
Select any of these settings when PS/2 keyboard and mouse are installed. These settings
only apply when Fast Boot is enabled.
[Auto] For a faster POST time, PS/2 devices will only be available when the
system boots up or rebooted when the PS/2 devices have not been
reconnected or changed. If you disconnect or change PS/2 devices before
restarting the system, PS/2 devices will not be available and BIOS setup
program will not be accessible via PS/2 devices.
[Full Initialization] For full system control, PS/2 devices will be available during POST at any
circumstances. This process will extend POST time.
[Disabled] For the fastest POST time, all PS/2 devices will not be available until your
computer enters the operating system.
Network Stack Driver Support [Disabled]
[Disabled] Select to skip the network stack driver from loading during POST.
[Enabled] Select to load the network stack driver during POST.
Next Boot after AC Power Loss [Normal Boot]
[Normal Boot] Returns to normal boot on the next boot after AC power loss.
[Fast Boot] Accelerates the boot speed on the next boot after AC power loss.
2.8.2 Boot Logo Display [Auto]
[Auto] Adjust automatically for Windows® requrement.
[Full Screen] Maximize the boot logo size.
[Disabled] Hide the logo during POST.
POST Delay Time [3 sec]
This item appears only when you set to [Auto] or [Full Screen]. This item Boot Logo Display
allows you to select the desired additional POST waiting time to easily enter the BIOS setup.
You can only execute the POST delay time during Normal Boot. The values range from 0 to
10 seconds.
This feature will only work under normal boot.
Post Report [5 sec]
This item appears only when you set to [Disabled]. This item allows you Boot Logo Display
to select a desired post report waiting time. Conguration options: [1 sec] ~ [10 sec] [Until
Press ESC].
2-36 Chapter 2: Getting started
2.8.3 Bootup NumLock State [On]
[On] Sets the power-on state of the NumLock to [On].
[Off] Sets the power-on state of the NumLock to [Off].
2.8.4 Wait for ‘F1’ If Error [Enabled]
When this item is set to [Enabled], the system waits for the F1 key to be pressed when error
occurs. Conguration options: [Disabled] [Enabled]
2.8.5 Option ROM Messages [Force BIOS]
[Force BIOS] The third-party ROM messages will be forced to display during the boot
sequence.
[Keep Current] The third-party ROM messages will be displayed only if the third-party
manufacturer had set the add-on device to do so.
2.8.6 Interrupt 19 Capture [Disabled]
[Enabled] Allows the option ROMs to trap Interrupt 19.
[Disabled] Disables this function.
2.8.7 Setup Mode [EZ Mode]
[Advanced Mode] Sets Advanced Mode as the default screen for entering the BIOS setup
program.
[EZ Mode] Sets EZ Mode as the default screen for entering the BIOS setup program.
2.8.8 CSM (Compatibility Support Module)
Allows you to congure the CSM (Compatibility Support Module) items to fully support the
various VGA, bootable devices and add-on devices for better compatibility.
Launch CSM [Enabled]
[Auto] The system automatically detects the bootable devices and the add-on
devices.
[Enabled] For better compatibility, enable the CSM to fully support the non-UEFI
driver add-on devices or the Windows
® UEFI mode.
[Disabled] Disable the CSM to fully support the Windows
® Security Update and
Security Boot.
The following four items appear when you set Launch CSM to [Enabled].
Boot Device Control [UEFI and L...]
Allows you to select the type of devices that you want to boot up. Conguration options:
[UEFI and Legacy OPROM] [Legacy OPROM only] [UEFI only]
Boot from Network Devices [Legacy OPR...]
Allows you to select the type of network devices that you want to launch. Conguration
options: [Legacy OPROM rst] [UEFI driver rst] [Ignore]
ASUS H81M-C 2-37
Boot from Storage Devices [Legacy OPR...]
Allows you to select the type of storage devices that you want to launch. Conguration
options: [Both, Legacy OPROM rst] [Both, UEFI rst] [Legacy OPROM rst] [UEFI driver
rst] [Ignore]
Boot from PCI-E/PCI Expansion Devices [Legacy OPR...]
Allows you to select the type of PCIe/PCI expansion devices that you want to launch.
Conguration options: [Legacy OPROM rst] [UEFI driver rst]
2.8.9 Secure Boot
Allows you to congure the Windows
® Secure Boot settings and manage its keys to protect
the system from unauthorized access and malwares during POST.
OS Type [Windows UE...]
Allows you to select your installed operating system.
[Windows UEFI mode] Executes the Microsoft
® Secure Boot check. Only select this
option when booting on Windows
® UEFI mode or other Microsoft®
Secure Boot compliant OS.
[Other OS] Get the optimized function when booting on Windows
® non-UEFI
mode, Windows® Vista/XP, or other Microsoft® Secure Boot
non-compliant OS. Only on Windows
® UEFI mode that Microsoft®
Secure Boot can function properly.
The following item appears when OS Type Windows UEFI mode is set to [ ].
Key Management
This item appears only when you set OS Type to [Windows UEFI Mode]. It allows you
to manage the Secure Boot keys.
Install Default Secure Boot keys
Allows you to immediately load the default Security Boot keys, Platform key
(PK), Key-exchange Key (KEK), Signature database (db), and Revoked
Signatures (dbx). When the default Secure boot keys are loaded, the PK
state will change from Unloaded mode to loaded mode.
Clear Secure Boot keys
This item appears only when you load the default Secure Boot keys. This
item allows you to clear all default Secure Boot keys.
Save Secure Boot Keys
Allows you to save the PK (Platform Keys) to a USB storage device.
PK Management
The Platform Key (PK) locks and secures the rmware from any non-permissible
changes. The system veries the PK before your system enters the OS.
Delete PK
Allows you to delete the PK from your system. Once the PK is deleted, all
the system’s Secure Boot keys will not be active. Conguration options:
[Yes] [No]
2-38 Chapter 2: Getting started
Load PK from File
Allows you to load the downloaded PK from a USB storage device.
The PK le must be formatted as a UEFI variable structure with time-based authenticated
variable.
KEK Management
The KEK (Key-exchange Key or Key Enrollment Key) manages the Signature database
(db) and Revoked Signature database (dbx).
Key-exchange Key (KEK) refers to Microsoft
® Secure Boot Key-Enrollment Key (KEK).
Delete the KEK
Allows you to delete the KEK from your system. Conguration options:
[Yes] [No]
Load KEK from File
Allows you to load the downloaded KEK from a USB storage device.
Append KEK from le
Allows you to load the additional KEK from a storage device for an
additional db and dbx loaded management.
The KEK le must be formatted as a UEFI variable structure with time-based authenticated
variable.
DB Management
The db (Authorized Signature database) lists the signers or images of UEFI
applications, operating system loaders, and UEFI drivers that you can load on the
single computer.
Delete the db
Allows you to delete the db le from your system. Conguration options:
[Yes] [No]
Load db from File
Allows you to load the downloaded db from a USB storage device.
Append db from le
Allows you to load the additional db from a storage device so that more
images can be loaded securely.
The DB le must be formatted as a UEFI variable structure with time-based authenticated
variable.
DBX Management
The dbx (Revoked Signature database) lists the forbidden images of db items that are
no longer trusted and cannot be loaded.
Delete the DBX
Allows you to delete the DBX le from your system. Conguration options:
[Yes] [No]
Load DBX from File
Allows you to load the downloaded DBX from a USB storage device.
Append DBX from le
Produkt Specifikationer
| Mærke: | Asus |
| Kategori: | Bundkort |
| Model: | H81M-C |
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