ASUS P7H55-M LE, P7H55-M LX, P7H55-M PLUS User Manual

P7H55-M LE
P7H55-M LX
P7H55-M LX2

Motherboard

E5956

First Edition V1
July 2010

Copyright © 2010 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, modied or altered, unless
such repair, modication 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,
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LOSS OF BUSINESS, LOSS OF USE OR DATA, INTERRUPTION OF BUSINESS AND THE LIKE),
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SPECIFICATIONS AND INFORMATION CONTAINED IN THIS MANUAL ARE FURNISHED FOR
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Offer to Provide Source Code of Certain Software

This product may contain copyrighted software that is licensed under the General Public License (“GPL”)
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You may obtain the complete corresponding source code (as dened in the GPL) for the GPL Software,

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including the GPL Software and/or LGPL Software, which will be no earlier than December 1, 2011, either

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In your request please provide the name, model number and version, as stated in the About Box of the
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This offer is valid to anyone in receipt of this information.

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etc to this email address).

ii

Contents

Notices .......................................................................................................... v

Safety information ...................................................................................... vi

About this guide ......................................................................................... vi

P7H55-M LE Series specications summary ......................................... viii

Chapter 1: Product introduction

1.1 Before you proceed ..................................................................... 1-1

1.2 Motherboard overview ................................................................. 1-2

1.2.1 Motherboard layout ......................................................... 1-2

1.2.2 Layout contents ............................................................... 1-2

1.3 Central Processing Unit (CPU) ................................................... 1-3

1.4 System memory ........................................................................... 1-3

1.4.1 Overview ......................................................................... 1-3

1.4.2 Memory congurations .................................................... 1-4

1.5 Expansion slots ............................................................................ 1-7

1.5.1 Installing an expansion card ........................................... 1-7

1.5.2 Conguring an expansion card ....................................... 1-7

1.5.3 PCI slots .......................................................................... 1-7

1.5.4 PCI Express x4 slot ......................................................... 1-7

1.5.5 PCI Express x16 slot ....................................................... 1-7

1.6 Jumpers ........................................................................................ 1-8

1.7 Connectors ................................................................................... 1-9

1.7.1 Rear panel ports ............................................................. 1-9

1.7.2 Internal connectors ....................................................... 1-10

1.8 Software support ........................................................................ 1-17

1.8.1 Installing an operating system ...................................... 1-17

1.8.2 Support DVD information .............................................. 1-17

Chapter 2: BIOS information

2.1 Managing and updating your BIOS ............................................ 2-1

2.1.1 ASUS Update .................................................................. 2-1

2.1.2 ASUS EZ Flash 2 ............................................................ 2-2

2.1.3 ASUS BIOS Updater ....................................................... 2-3

2.1.4 ASUS CrashFree BIOS 3 ................................................ 2-6

iii

Contents

2.2 BIOS setup program .................................................................... 2-7

2.3 Main menu .................................................................................... 2-8

2.3.1 System Time [xx:xx:xx] ................................................... 2-8

2.3.2 System Date [Day xx/xx/xxxx] ......................................... 2-8

2.3.3 Legacy Diskette A [1.44M, 3.5 in.] ................................... 2-8

2.3.4 Language [English] ......................................................... 2-8

2.3.5 SATA 1-6 ............................................................................................ 2-8

2.3.6 Storage Conguration ..................................................... 2-9

2.3.7 System Information ....................................................... 2-10

2.4 Advanced menu ......................................................................... 2-10

2.4.1 CPU Conguration ........................................................ 2-10

2.4.2 Chipset .......................................................................... 2-12

2.4.3 Onboard Devices Conguration .................................... 2-12

2.4.4 USB Conguration ........................................................ 2-14

2.4.5 PCI PnP ........................................................................ 2-14

2.4.6 Intel VT-d Conguration ................................................ 2-15

2.5 Power menu ................................................................................ 2-15

2.5.1 Suspend Mode [Auto] ................................................... 2-15

2.5.2 ACPI 2.0 Support [Enabled] .......................................... 2-15

2.5.3 ACPI APIC Support [Enabled] ....................................... 2-15

2.5.4 Anti Surge Support [Disabled] ....................................... 2-15

2.5.5 APM Conguration ........................................................ 2-16

2.5.6 Hardware Monitor ......................................................... 2-16

2.6 Boot menu .................................................................................. 2-17

2.6.1 Boot Device Priority ...................................................... 2-17

2.6.2 Boot Settings Conguration .......................................... 2-17

2.6.3 Security ......................................................................... 2-18

2.7 Tools menu ................................................................................. 2-19

2.8 Exit menu .................................................................................... 2-20

P7P55/P7H57/P7H55 series motherboardsinstallation notices .......... 2-21

Intel® LGA1156 processor and chipset combination instruction .. 2-21

Memory conguration ................................................................... 2-21

Congurations for the PCI Express x16 slots ............................... 2-21

iv

Notices

Federal Communications Commission Statement

This device complies with Part 15 of the FCC Rules. Operation is subject to the following two
conditions:

• This device may not cause harmful interference, and

• This device must accept any interference received including interference that may cause
undesired operation.

This equipment has been tested and found to comply with the limits for a Class B digital
device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference in a residential installation. This
equipment generates, uses and can radiate radio frequency energy and, if not installed

and used in accordance with manufacturer’s instructions, may cause harmful interference

to radio communications. However, there is no guarantee that interference will not occur
in a particular installation. If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the equipment off and on, the user
is encouraged to try to correct the interference by one or more of the following measures:

•

Reorient or relocate the receiving antenna.

•

Increase the separation between the equipment and receiver.

•

Connect the equipment to an outlet on a circuit different from that to which the receiver is
connected.

•

Consult the dealer or an experienced radio/TV technician for help.

The use of shielded cables for connection of the monitor to the graphics card is required

to assure compliance with FCC regulations. Changes or modications to this unit not
expressly approved by the party responsible for compliance could void the user’s authority

to operate this equipment.

Canadian Department of Communications Statement

This digital apparatus does not exceed the Class B limits for radio noise emissions from
digital apparatus set out in the Radio Interference Regulations of the Canadian Department
of Communications.

This class B digital apparatus complies with Canadian ICES-003.

REACH

Complying with the REACH (Registration, Evaluation, Authorisation, and Restriction of
Chemicals) regulatory framework, we published the chemical substances in our products at
ASUS REACH website at http://csr.asus.com/english/REACH.htm.

DO NOT throw the motherboard in municipal waste. This product has been designed to
enable proper reuse of parts and recycling. This symbol of the crossed out wheeled bin
indicates that the product (electrical and electronic equipment) should not be placed in
municipal waste. Check local regulations for disposal of electronic products.

DO NOT throw the mercury-containing button cell battery in municipal waste. This symbol
of the crossed out wheeled bin indicates that the battery should not be placed in municipal
waste.

v

Safety information

Electrical safety

• To prevent electric shock hazard, disconnect the power cable from the electric 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 qualied service

technician or your retailer.

Operation safety

•

Before installing the motherboard and adding devices on it, carefully read all the manuals
that came with the package.

•

Before using the product, ensure that 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 become wet.

•

Place the product on a stable surface.

•

If you encounter technical problems with the product, contact a qualied service

technician or your retailer.

About this guide

This user guide contains the information you need when installing and conguring 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.

• Chapter 2: BIOS information

This chapter tells how to change system settings through the BIOS Setup menus.

Detailed descriptions of the BIOS parameters are also provided.

vi

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 trying to

complete a task.

CAUTION: Information to prevent damage to the components when trying to

complete a task.

IMPORTANT: Instructions that you MUST follow to complete a task.

NOTE: Tips and additional information to help you complete a task.

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.

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 (+).
Example: <Ctrl>+<Alt>+<D>

vii

P7H55-M LE Series specications summary

CPU LGA1156 socket for Intel® Core™ i7/ Core™ i5/ Core™ i3/

Chipset Intel® H55 Express Chipset
Memory Dual-channel memory architecture

Expansion slots 1 x PCIe 2.0 x16 slot

VGA output P7H55-M LE:

Storage Intel® H55 Express Chipset:

LAN

Audio VIA® VT1708S 8-channel High Denition Audio CODEC

USB 12 x USB 2.0/1.1 ports (6 ports at the mid-board, 6 ports at the

ASUS unique
features

Pentium® processors
Supports Intel® next generation 32nm multi-core CPU

* Refer to www.asus.com for Intel® CPU support list.

2 x DIMM, max. 8GB, DDR3 1333/1066 MHz, non-ECC,

un-buffered memory
* When you install a total memory of 4GB capacity or more,

Windows® 32-bit operating system may only recognize less
than 3GB. We recommend a maximum of 3GB system
memory if you are using a Windows® 32-bit operating system.

1 x PCIe 2.0 x4 slot
2 x PCI slots

Multi-VGA output support: HDMI, DVI-D, and RGB ports

- HDMI with Max. resolution: 1920 x 1200 @60Hz

- DVI-D with Max. resolution: 1920 x 1200 @60Hz

- D-Sub with Max. resolution: 2048 x 1536 @75Hz

P7H55-M LX:
Multi-VGA output support: DVI-D, and RGB ports

- DVI-D with Max. resolution: 1920 x 1200 @60Hz

- D-Sub with Max. resolution: 2048 x 1536 @75Hz

P7H55-M LX2:

Multi-VGA output support: RGB port

- D-Sub with Max. resolution: 2048 x 1536 @75Hz

Supports Microsoft® DirectX 10

- 6 x Serial ATA 3.0 Gb/s connectors

- 1 x Ultra DMA 100/66 connector (for P7H55-M LE only)

- 1 x Floppy connector (for P7H55-M LE only)

Realtek® 8112L PCIe Gigabit LAN controller

- Supports Multi-streaming

back panel)

ASUS CrashFree BIOS 3
Anti-Surge protection
ASUS EZ Flash 2
ASUS Q-Fan 2
ASUS AI NET 2
ASUS MyLogo 2

viii

(continued on the next page)

P7H55-M LE Series specications summary

Rear panel ports 1 x PS/2 Mouse port

Internal connectors 3 x USB 2.0/1.1 connectors support additional 6 USB 2.0/1.1 ports

BIOS features 64 Mb Flash ROM, AMI BIOS, PnP, DMI v2.0, WfM 2.0, ACPI v2.0a,

Manageability

Accessories 2 x Serial ATA cables

Support DVD Drivers

Form factor

1 x PS/2 Keyboard port
1 x COM port (for P7H55-M LE only)
1 x D-Sub port
1 x DVI-D port (for P7H55-M LE and P7H55-M LX only)
1 x HDMI port (for P7H55-M LE only)
1 x LAN (RJ-45) port
6 x USB 2.0/1.1 ports
3 x audio jacks

6 x SATA connectors
1 x 24-pin EATX power connector
1 x 4-pin ATX 12V power connector
1 x CPU fan connector
1 x Chassis fan connector
1 x Front panel audio connector
1 x System panel connector
1 x S/PDIF Out connector (for P7H55-M LE and P7H55-M LX only)
1 x COM connector (for P7H55-M LE and P7H55-M LX only)
1 x IDE connector (for P7H55-M LE only)
1 x Floppy disk drive connector (for P7H55-M LE only)
1 x LPT connector (for P7H55-M LE only)

SM BIOS v2.5

WOL, PXE, PME Wake up, WOR by Ring

1 x I/O shield
1 x IDE cable (for P7H55-M LE only)
1 x User Manual
1 x Support DVD

ASUS PC Probe II
ASUS Update
Anti-virus software (OEM version)

uATX form factor: 9.6 in x 8.6 in (24.4 cm x 22.9 cm)

* Specications are subject to change without notice.

ix

Chapter 1

SB_PWR

ON

Standby Power Powered Off

OFF

P

7

H

5

5

-

M

L

E

P7H55-M LE Onboard LED

Product introduction

Thank you for buying an ASUS® P7H55-M LE Series motherboard!
Before you start installing the motherboard, and hardware devices on it, check the items in

your motherboard package. Refer to page ix for the list of accessories.

If any of the items is damaged or missing, contact your retailer.

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, switch off the ATX power supply and
detach its power cord. Failure to do so may cause severe damage to the motherboard,
peripherals, or components.

Onboard LED

This 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 must 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.

Chapter 1: Product introduction1-1

1.2 Motherboard overview

P7H55-

M

LE

PCIEX16

PCI1

PCIEX4_1

LPT

USB1112 USB910 USB78

AAFP

ATX12V

EATXPWR

CPU_FAN

CHA_FAN

Lithium Cell

CMOS Power

Super

I/O

ICS

954 A4

VIA

VT1708S

RTL

8112L

64Mb
BIOS

SB_PWR

PCI2

SPDIF_OUT

24.4cm(9.6in)

21.8cm(8.6in)

LGA1156

Intel

®

H55

DDR3 DIMM_A1 (64bit, 240-pin module)

DDR3 DIMM_B1 (64bit, 240-pin module)

SATA1
SATA2

SATA3
SATA4

SATA5
SATA6

PRI_EIDE

COM2

KBMS

HDMI

COM1

DVI

AUDIO

VGA

LAN1_USB12

USB3_6

FLOPPY

F_PANEL

CLRTC

21 43 5 6

2

8

7

9

10

1113 121415

1.2.1 Motherboard layout

The layout varies with models. The layout illustrations in this user guide are for
P7H55-M LE only.

Ensure that you install the motherboard into the chassis in the correct orientation. The edge
with external ports goes to the rear part of the chassis.

Place this side towards
the rear of the chassis.

1.2.2 Layout contents

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.

Connectors/Jumpers/Slots/LED Page Connectors/Jumpers/Slots/LED Page

1.

2.

3. Intel® CPU socket 11. System panel connector (10-1 pin F_PANEL) 1-12

4. DDR3 DIMM sockets 1-3 12. Clear RTC RAM (3-pin CLRTC) 1-8

5. Serial port connectors (10-1 pin COM2) 1-15 13.

6. LPT connector (26-1 pin LPT) 1-15 14. Digital audio connector (4-1 pin SPDIF_OUT) 1-11

7. Floppy disk drive connector (34-1 pin FLOPPY) 1-14 15. Front panel audio connector (10-1 pin AAFP) 1-14

8. IDE connector (40-1 pin PRI_EIDE) 1-16

CPU and Chassis fan connectors (4-pin CPU_FAN,
3-pin CHA_FAN)

ATX power connectors (24-pin EATXPWR, 4-pin
ATX12V)

1-12 9. Serial ATA connectors (7-pin SATA1-6) 1-11

1-13 10. Onboard LED (SB_PWR) 1-1

USB connectors (10-1 pin USB78, USB910,
USB1112)

1-10

1-2ASUS P7H55-M LE Series

1.3 Central Processing Unit (CPU)

P

7

H

5

5

-

M

L

E

P7H55-M LE 240-pin DDR3 DIMM sockets

DIMM_A1

DIMM_B1

This motherboard comes with a surface mount LGA1156 socket designed for the
Intel® Core™ i7 / Core™ i5 / Core™ i3 / Pentium® processors.

Ensure that all power cables are unplugged before installing the CPU.

• 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

LGA1156 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.

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 has the same physical dimensions as a DDR3 DIMM but is notched
differently to prevent installation on a DDR3 DIMM socket. DDR3 modules are developed

for better performance with less power consumption. The gure illustrates the location of the

DDR3 DIMM sockets:

Chapter 1: Product introduction1-3

1.4.2 Memory congurations

You may install 512MB, 1GB, 2GB, and 4GB 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 conguration. Any excess
memory from the higher-sized channel is then mapped for single-channel operation.

• Always install DIMMs with the same CAS latency. For optimum compatibility, it is
recommended that you obtain memory modules from the same vendor.

• Due to the memory address limitation on the 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 either of the
following:

Voltage

voltage)

voltage)

®

OS.

- Use a maximum of 3GB system memory if you are using a 32-bit Windows

- Use a 64-bit Windows® OS if you want to install 4GB or more memory on the
motherboard.

• This motherboard does not support DIMMs made up of 256 megabits (Mb) chips or less.

P7H55-M LE Series Motherboard Qualied Vendors List (QVL)

DDR3-1333MHz capability

Vendor Part No. Size

A-Data AD31333001GOU 1024MB SS A-Data AD30908C8D-151C E0906 - - •

A-Data AD31333G001GOU 3072MB(Kit of 3) SS - - 8-8-8-24 1.65-1.85V • •

A-Data AD31333G002GMU 2048MB DS - - 8-8-8-24 1.65-1.85V • •

Apacer 78.A1GC6.9L1 2048MB DS APACER AM5D5808DEWSBG - - • •

CORSAIR CM3X1024-1333C9DHX 1024MB SS - - 9-9-9-24 1.60V • •

CORSAIR CM3X1024-1333C9 1024MB SS - - 9-9-9-24 1.60V •

CORSAIR TR3X3G1333C9 G 3072MB(Kit of 3) SS - - 9-9-9-24 1.50V •

CORSAIR TR3X3G1333C9 G 3072MB(Kit of 3) SS - - 9-9-9-24 1.50V • •

CORSAIR TR3X3G1333C9 3072MB(Kit of 3) SS - - 9 1.5V • •

CORSAIR CM3X1024-1333C9DHX 1024MB DS Corsair - - - •

CORSAIR CM3X2048-1333C9DHX 2048MB DS - - - - • •

CORSAIR TW3X4G1333C9 G 4096MB(Kit of 2) DS - - 9-9-9-24 1.50V • •

CORSAIR CMX8GX3M4A1333C9 8192MB(Kit of 4) DS - - 9-9-9-24 1.50V •

Crucial CT12864BA1339.8FF 1024MB SS Micron 9FF22D9KPT 9 - • •

Crucial BL12864TA1336.8SFB1 2048MB(Kit of 2) SS - - 6-6-6-20 1.8V • •

Crucial CT25664BA1339.16FF 2048MB DS Micron 9KF27D9KPT 9 - • •

Crucial BL25664ABA1336.16SFB1 4096MB(Kit of 2) DS - - 6-6-6-20 1.8V •

Crucial BL25664BA1336.16SFB1 4096MB(Kit of 2) DS - - 6-6-6-20 1.8V • •

Crucial BL25664BN1337.16FF (XMP) 6144MB(Kit of 3 ) DS - - 7-7-7-24 1.65V • •

ELPIDA EBJ10UE8EDF0-DJ-F 1024MB SS ELPIDA J1108EDSE-DJ-F - 1.35V(low

ELPIDA EBJ21UE8EDF0-DJ-F 2048MB DS ELPIDA J1108EDSE-DJ-F - 1.35V(low

G.SKILL F3-10666CL7T-3GBPK 3072MB(Kit of 3) SS - - 7-7-7-18 1.5~1.6V • •

G.SKILL F3-10666CL9T-3GBNQ 3072MB(Kit of 3) SS - - 9-9-9-24 1.5~1.6V • •

SS/DSChip

Brand

Chip No.

Timing

DIMM

(BIOS)

DIMM

Support

A* B*

• •

• •

(continued on the next page)

1-4ASUS P7H55-M LE Series

DDR3-1333MHz capability

Voltage

voltage)

voltage)

DIMM

Support

A* B*

• •

• •

Vendor Part No. Size

G.SKILL F3-10600CL9D-2GBNQ 1024MB DS G.SKILL - - - • •

G.SKILL F3-10666CL8D-

4GBECO(XMP)

G.SKILL F3-10666CL8D-4GBHK(XMP) 4096MB(Kit of 2 ) DS - - 8-8-8-21 1.5-1.6V • •

G.SKILL F3-10666CL7T-6GBPK(XMP) 6144MB(Kit of 3 ) DS - - 7-7-7-18 1.5~1.6V •

G.SKILL F3-10666CL9T-6GBNQ 6144MB(Kit of 3) DS - - 9-9-9-24 1.5V~1.6V • •

GEIL GV32GB1333C9DC 1024MB SS - - 9 - •

GEIL GV34GB1333C7DC 2048MB DS - - 7-7-7-24 1.5V •

GEIL GG34GB1333C9DC 4096MB(Kit of 2) DS GEIL GL1L128M88BA12N 9-9-9-24 1.3V(low

GEIL GV32GB1333C9SC 6144MB(Kit of 3 ) DS - - 9 1.5V • •

Kingmax FLFD45F-B8MF9 1024MB SS Micron 8HD22D9JNM - - •

Kingmax FLFD45F-B8MH9 MAES 1024MB SS Micron 9CF22D9KPT - - • •

Kingmax FLFE85F-B8MF9 2048MB DS Micron 8HD22D9JNM - - • •

Kingmax FLFE85F-B8MH9 MEES 2048MB DS Micron 9GF27D9KPT - - • •

KINGSTON KVR1333D3N9/1G 1024MB SS KTC D1288JELDPGD9U - - •

KINGSTON KVR1333D3N9/2G 2048MB DS Qimonda IDSH1G-03A1F1C-13H - 1.5V • •

KINGSTON KVR1333D3N9/4G 4096MB DS Hynix H5TQ2G83AFR - - • •

Micron MT8JTF12864AZ-1G4F1 1024MB SS Micron 9FF22D9KPT 9 - • •

Micron MT16JTF25664AZ-1G4F1 2048MB DS Micron 9KF27D9KPT 9 - • •

OCZ OCZ3P13332GK 2048MB(Kit of 2) SS - - 7-7-7-20 1.8V •

OCZ OCZ3X1333LV3GK(XMP) 3072MB(Kit of 3) SS - - - 1.6V •

OCZ OCZ3G13334GK 4096MB(Kit of 2) DS - - - 1.7V • •

OCZ OCZ3P13334GK 4096MB(Kit of 2) DS - - 7-7-7-20 1.8V •

OCZ OCZ3P1333LV4GK 4096MB(Kit of 2) DS - - 7-7-7-20 1.65V • •

OCZ OCZ3P1333LV4GK 4096MB(Kit of 2) DS - - 7-7-7-20 1.65V •

OCZ OCZ3X13334GK(XMP) 4096MB(Kit of 2) DS - - 7-7-7-20 1.75V • •

OCZ OCZ3G1333LV6GK 6144MB(Kit of 3 ) DS - - 9-9-9-20 1.65V • •

OCZ OCZ3P1333LV6GK 6144MB(Kit of 3 ) DS - - 7-7-7-20 1.65V •

OCZ OCZ3X1333LV6GK(XMP) 6144MB(Kit of 3 ) DS - - 8-8-8-20 1.60V • •

PSC AL7F8G73D-DG1 1024MB SS PSC A3P1GF3DGF928M9B05 8-8-8-24 1.5V • •

PSC AL8F8G73D-DG1 2048MB DS PSC A3P1GF3DGF928M9B05 8-8-8-24 1.5V • •

SAMSUNG M378B2873DZ1-CH9 1024MB SS Samsung K4B1G0846D-HCH9 - - • •

SAMSUNG M378B2873DZ1-CH9 1024MB SS Samsung SEC 846 HCH9

SAMSUNG M378B2873EH1-CH9 1024MB SS Samsung SEC 913 HCH9

SAMSUNG M378B5673DZ1-CH9 2048MB DS Samsung K4B1G0846D-HCH9 - - •

SAMSUNG M378B5673EH1-CH9 2048MB DS Samsung SEC 913 HCH9

Transcend TS256MLK64V3U 2048MB DS Micron 9GF27D9KPT - - •

4096MB(Kit of 2 ) DS - - 8-8-8-8-24 1.35V(low

SS/DSChip

Brand

Chip No.

K4B1G08460

K4B1G0846E

K4B1G0846E

Timing

DIMM

(BIOS)

- - • •

- - • •

- - •

Chapter 1: Product introduction1-5

DDR3-1066MHz capability

Vendor Part No. Size

Crucial CT12864BA1067.8FF 1024MB SS Micron 9GF22D9KPT 7 - • •

Crucial CT25664BA1067.16FF 2048MB DS Micron 9HF22D9KPT 7 - • •

ELPIDA EBJ10UE8EDF0-AE-F 1024MB SS ELPIDA J1108EDSE-DJ-F - 1.35V(low voltage) • •

ELPIDA EBJ51UD8BAFA-AC-E 512MB SS Elpida J5308BASE-AC-E - - •

ELPIDA EBJ51UD8BAFA-AE-E 512MB SS Elpida J5308BASE-AC-E - - • •

ELPIDA EBJ11UD8BAFA-AE-E 1024MB DS Elpida J5308BASE-AC-E - - • •

ELPIDA EBJ21UE8EDF0-AE-F 2048MB DS ELPIDA J1108EDSE-DJ-F - 1.35V(low voltage) • •

KINGSTON KVR1066D3N7/1G 1024MB SS Kingston D1288JEKAPGA7U 7 1.5V •

KINGSTON KVR1066D3N7/2G 2048MB DS Kingston D1288JEKAPGA7U 7 1.5V • •

KINGSTON KVR1066D3N7/4G 4096MB DS Hynix H5TQ2G83AFR 7 1.5V • •

Micron MT8JTF12864AZ-1G1F1 1024MB SS Micron 9GF22D9KPT 7 - • •

Micron MT16JTF25664AZ-1G1F1 2048MB DS Micron 9HF22D9KPT 7 - • •

SAMSUNG M378B2873EH1-CF8 1024MB SS Samsung SEC 901 HCF8

SAMSUNG M378B5273BH1-CF8 4096MB DS Samsung 846 K4B2G0846B-HCF8 - - • •

Elixir M2Y2G64CB8HC5N-BE 2048MB DS Elixir N2CB1G80CN-BE - - •

Elixir M2Y2G64CBHA9N-BE 2048MB DS - - 7-7-7-20 - • •

Elixir M2Y2G64CBHC9N-BE 2048MB DS Elixir - - - • •

Kingtiger 2GB DIMM PC3-8500 2048MB DS Hynix H5TQ1G83AFP G7C - - • •

SS/

Chip Brand Chip No.

DS

K4B1G0846E

Timing

DIMM

(BIOS)

Voltage

- - • •

DIMM

Support

A* C*

SS - Single-sided / DS - Double - sided
DIMM support:

• A*: Supports one module inserted into any slot as Single-channel memory conguration.

• B*: Supports one pair of modules inserted into both the slots as one pair of Dual-channel

memory conguration.

Visit the ASUS website at www.asus.com for the latest QVL.

1-6ASUS P7H55-M LE Series

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 comes with it and
make the necessary hardware settings for the card.

2. Remove the chassis cover (if your motherboard is already installed in a chassis).

3. Remove the bracket opposite the slot that you intend to 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.

6. Replace the chassis cover.

1.5.2 Conguring an expansion card

After installing the expansion card, congure 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, conicts will arise between the two PCI

groups, making the system unstable and the card inoperable.

1.5.3 PCI slots

The PCI slots support cards such as LAN cards, SCSI cards, USB cards, and other cards

that comply with the PCI specications.

1.5.4 PCI Express x4 slot

This motherboard supports PCI Express x4 network cards, SCSI cards and other cards that

comply with the PCI Express specications.

1.5.5 PCI Express x16 slot

This motherboard supports PCI Express x16 graphics cards that comply with the PCI

Express specications.

Chapter 1: Product introduction1-7

1.6 Jumpers

P

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5

5

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P7H55-M LE Clear RTC RAM

1

2 2 3

Normal

(Default)

Clear RTC

CLRTC

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.

To erase the RTC RAM:

1. Turn OFF the computer and unplug the power cord.

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 reenter
data.

Except when clearing the RTC RAM, never remove the cap on CLRTC jumper default
position. Removing the cap will cause system boot failure!

• 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 cut off the AC power, then reboot the system, the BIOS automatically resets
parameter settings to default values.

1-8ASUS P7H55-M LE Series

1.7 Connectors

5 6

7

2

3

11

4

8

10

9

1

12

1.7.1 Rear panel ports

1. PS/2 Mouse port. This port is for a PS/2 mouse.

2. COM port (for P7H55-M LE only). This 9-pin COM1 port is for serial devices.

3. Video Graphics Adapter (VGA) port. This 15-pin port is for a VGA monitor or other

VGA-compatible devices.

4. LAN (RJ-45) port. This port allows Gigabit connection to a Local Area Network (LAN)

through a network hub. Refer to the table on the next page for the LAN port LED
indicators.

LAN port LED indications

ACT/LINK LED SPEED LED

Status Description Status Description

OFF No link OFF 10 Mbps connection

ORANGE Linked ORANGE 100 Mbps connection

BLINKING Data activity GREEN 1 Gbps connection

ACT/LINK

LED

LAN port

SPEED

LED

5. Line In port (light blue). This port connects the tape, CD, DVD player, or other audio

sources.

6. Line Out port (lime). This port connects to a headphone or a speaker. In 4-channel,

6-channel, and 8-channel congurations, the function of this port becomes Front

Speaker Out.

7. Microphone port (pink). This port connects a microphone.

Refer to the audio conguration table below for the function of the audio ports in the 2, 4, 6,
or 8-channel conguration.

Audio 2, 4, 6, 8-channel conguration

Port Headset 2-channel 4-channel 6-channel 8-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

Chapter 1: Product introduction1-9

P

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5

5

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P7H55-M LE USB2.0 connectors

PIN 1

USB+5V

USB_P10-

USB_P10+

GND

NC

USB+5V

USB_P9-

USB_P9+

GND

USB910

PIN 1

USB+5V

USB_P12-

USB_P12+

GND

NC

USB+5V

USB_P11-

USB_P11+

GND

USB1112

PIN 1

USB+5V

USB_P8-

USB_P8+

GND

NC

USB+5V

USB_P7-

USB_P7+

GND

USB78

To congure an 8-channel audio output:

Use a chassis with HD audio module in the front panel to support an 8-channel audio

output.

8. USB 2.0 ports 1 and 2. These two 4-pin Universal Serial Bus (USB) ports connect to

USB 2.0/1.1 devices.

9. USB 2.0 ports 3, 4, 5, and 6. These four 4-pin Universal Serial Bus (USB) ports

connect to USB 2.0/1.1 devices.

10. DVI-D port (for P7H55-M LE and P7H55-M LX only). This port is for any DVI-D

compatible device. DVI-D can’t be converted to output RGB Signal to CRT and isn’t

compatible with DVI-I.

11. HDMI port (for P7H55-M LE only). This is a High-Denition Mulltimedia Interface

(HDMI) connector, and is HDCP compliant allowing playback of HD DVD, Blu-Ray, and
other protected content.

12. PS/2 Keyboard port. This port is for a PS/2 keyboard.

1.7.2 Internal connectors

1. USB connectors (10-1 pin USB78, 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 the USB 2.0 specication that 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.

1-10ASUS P7H55-M LE Series

2. Serial ATA connectors (7-pin SATA1-6)

SATA3

GND

RSATA_RXN3

RSATA_RXP3

GND

RSATA_TXN3

RSATA_TXP3

GND

SATA4

GND

RSATA_RXN4

RSATA_RXP4

GND

RSATA_TXN4

RSATA_TXP4

GND

SATA1

GND

RSATA_RXN1

RSATA_RXP1

GND

RSATA_TXN1

RSATA_TXP1

GND

SATA2

GND

RSATA_RXN2

RSATA_RXP2

GND

RSATA_TXN2

RSATA_TXP2

GND

SATA5

GND

RSATA_RXN5

RSATA_RXP5

GND

RSATA_TXN5

RSATA_TXP5

GND

SATA6

GND

RSATA_RXN6

RSATA_RXP6

GND

RSATA_TXN6

RSATA_TXP6

GND

P

7

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5

5

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P7H55-M LE SATA connectors

P

7

H

5

5

-

M

L

E

SPDIF_OUT

+5V

SPDIFOUT

GND

P7H55-M LE Digital audio connector

These connectors are for the Serial ATA signal cables for Serial ATA 3Gb/s hard disk
and optical disk drives. The Serial ATA 3Gb/s is backward compatible with Serial ATA

1.5Gb/s specication. The data transfer rate of the Serial ATA 3Gb/s is faster than the

standard parallel ATA with 133MB/s (Ultra DMA133).

Install the Windows® XP Service Pack 2 or later version before using Serial ATA.

3. Digital audio connector (4-1 pin SPDIF_OUT)
(for P7H55-M LE and P7H55-M LX only)

This connector is for an additional Sony/Philips Digital Interface (S/PDIF) port.

The S/PDIF module is purchased separately.

Chapter 1: Product introduction1-11

4. CPU and Chassis fan connectors (4-pin CPU_FAN, 3-pin CHA_FAN)

P

7

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5

5

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P7H55-M LE fan connectors

Rotation

+12V

GND

CHA_FAN

CPU_FAN

CPU FAN PWM

CPU FAN IN

CPU FAN PWR

GND

P

7

H

5

5

-

M

L

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P7H55-M LE System panel connector

PIN 1

PWR BTN

PLED+

PLED-

PWR

GND

IDE_LED+

IDE_LED-

Ground

Reset

F_PANEL

PWR LED

HD_LED RESET

Connect the fan cables to the fan connectors on the motherboard, making sure 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. Insufcient air ow inside

the system may damage the motherboard components. They are not jumpers! DO NOT
place jumper caps on the fan connectors.

5. System panel connector (10-1 pin F_PANEL)

This connector supports several chassis-mounted functions.

• System power LED (2-pin PLED)

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 +HDLED)

This 2-pin connector is for the HDD Activity LED. Connect the HDD Activity LED cable

to this connector. The IDE LED lights up or ashes when data is read from or written to

the HDD.

• Power/Soft-off button (2-pin PWRBTN)

This 2-pin 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.

1-12ASUS P7H55-M LE Series

6. ATX power connectors (24-pin EATXPWR, 4-pin ATX12V)

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5

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P7H55-M LE ATX power connectors

EATXPWR

PIN 1

GND
+5 Volts
+5 Volts
+5 Volts

-5 Volts
GND
GND
GND
PSON#
GND

-12 Volts
+3 Volts

+3 Volts
+12 Volts
+12 Volts

+5V Standby

Power OK

GND

+5 Volts

GND

+5 Volts

GND
+3 Volts
+3 Volts

ATX12V

PIN 1

+12V DC

+12V DC

GND

GND

These connectors are for an ATX power supply. The plugs from the power supply are

designed to t these connectors in only one orientation. Find the proper orientation and
push down rmly until the connectors completely t.

•

We recommend that you use an ATX 12V Specication 2.0-compliant power supply unit

(PSU) with a minimum of 300W power rating. This PSU type has 24-pin and 4-pin power
plugs.

•

If you intend to use a PSU with 20-pin and 4-pin power plugs, make sure that the 20-pin
power plug can provide at least 15 A on +12 V and that the PSU has a minimum power
rating of 300 W. The system may become unstable or may not boot up if the power is
inadequate.

• DO NOT forget to connect the 4-pin ATX +12 V power plug; otherwise, the system will

not boot up.

• We recommend that you use a PSU with higher power output when conguring 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.

Chapter 1: Product introduction1-13

7. Front panel audio connector (10-1 pin AAFP)

P

7

H

5

5

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P7H55-M LE Front panel audio connector

AAFP

PIN 1

GND

PRESENCE#

SENSE1_RETUR

SENSE2_RETUR

PORT1 L

PORT1 R

PORT2 R

SENSE_SEND

PORT2 L

HD-audio-compliant

pin definition

PIN 1

AGNDNCNC

NC

MIC2

MICPWR

Line out_R

NC

Line out_L

Legacy AC’97

compliant definition

P

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H

5

5

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M

L

E

P7H55-M LE Floppy disk drive connector

FLOPPY

NOTE:Orient the red markings
on the floppy ribbon cable to PIN 1.

PIN1

This connector is for a chassis-mounted front panel audio I/O module that supports

either High Denition Audio or AC`97 audio standard. Connect one end of the front

panel audio I/O module cable to this connector.

If you want to connect a high-denition front panel audio module to this connector, ensure

that the Front Panel Type item in the BIOS is set to [HD Audio]. If you want to connect an
AC97 front panel audio module to this connector, set the item to [AC97]. See section 2.4.3
Onboard Devices Conguration for details.

8. Floppy disk drive connector (34-1 pin FLOPPY) (for P7H55-M LE only)

This connector is for the oppy disk drive (FDD) signal cable. Insert one end of the

cable to this connector, then connect the other end to the signal connector at the back

of the oppy disk drive.

• Pin 5 on the connector is removed to prevent incorrect cable connection when using a
FDD cable with a covered Pin 5.

• The FDD cable is purchased separately.

1-14ASUS P7H55-M LE Series

9. IDE connector (40-1 pin PRI_EIDE) (for P7H55-M LE only)

P

7

H

5

5

-

M

L

E

P7H55-M LE IDE connector

PRI_EIDE

NOTE:Orient the red markings
on the IDE ribbon cable to PIN 1.

PIN1

The onboard IDE connector is for Ultra DMA 100/66 signal cable. There are three
connectors on each Ultra DMA 100/66 signal cable: blue, black, and gray. Connect the

blue connector to the motherboard’s IDE connector, then select one of the following
modes to congure your devices:

Drive jumper setting Mode of device(s) Cable connector

Single device Cable-Select or Master - Black

Cable-Select

Two devices

Master Master

Slave Slave

• Pin 20 on the IDE connector is removed to match the covered hole on the Ultra DMA
cable connector. This prevents incorrect insertion when you connect the IDE cable.

• Use the 80-conductor IDE cable for Ultra DMA 100/66 IDE devices.

If any device jumper is set as “Cable-Select”, ensure that all other device jumpers have the
same setting.

Master Black

Slave Gray

Black or gray

Chapter 1: Product introduction1-15

10. Serial port connectors (10-1 pin COM2) (for P7H55-M LE and P7H55-M LX only)

P

7

H

5

5

-

M

L

E

P7H55-M LE Serial port (COM2) connector

PIN 1

COM2

The connector is for a serial (COM) port. Connect the serial port module cable to the

connector, then install the module to a slot opening at the back of the system chassis.

The serial port bracket (COM2) is purchased separately.

1-16ASUS P7H55-M LE Series

1.8 Software support

1.8.1 Installing an operating system

This motherboard supports Windows® XP/Vista/7 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.

• Ensure that you install Windows® XP Service Pack 3 or later versions / Windows® Vista
Service Pack 1 or later versions before installing the drivers for better compatibility and
system stability.

1.8.2 Support DVD information

The Support DVD that comes with the motherboard package contains drivers, software
applications, and utilities that you can install to get all motherboard features.

To run the Support DVD

Place the Support DVD into the optical drive. The DVD automatically displays the Drivers
menu if the Autorun function is enabled on your computer.

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.

Click an icon to
display Support
DVD/motherboard
information

Click an item to install

If the Autorun function is NOT enabled on your computer, browse the contents of the

Support DVD to locate the le ASSETUP.EXE from the BIN folder. Double-click
ASSETUP.EXE to run the DVD.

Chapter 1: Product introduction1-17

Chapter 2

BIOS information

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 ASUS Update

The ASUS Update is a utility that allows you to manage, save, and update the motherboard
BIOS in Windows® environment.

• ASUS Update requires an Internet connection either through a network or an Internet
Service Provider (ISP).

• This utility is available in the support DVD that comes with the motherboard package.

Installing ASUS Update

To install ASUS Update:

1. Place the support DVD into the optical drive. The Drivers menu appears.

2. Click the Utilities tab, then click ASUS Update.

3. Follow the onscreen instructions to complete the installation.

Quit all Windows® applications before you update the BIOS using this utility.

Updating the BIOS

To update the BIOS:

1. From the Windows® desktop, click Start > Programs > ASUS > ASUS Update >

ASUS Update to launch the ASUS Update utility.

2. From the dropdown list, select either of the following methods:

Updating from the Internet

a. Select Update BIOS from the Internet, then click Next.

b. Select the ASUS FTP site nearest you to avoid network trafc, or click Auto

Select then click Next.

c. From the FTP site, select the BIOS version that you want to download then click

Next.

ASUS P7H55-M LE Series 2-1

The ASUS Update utility is capable of updating itself through the Internet. Always update
the utility to avail all its features.

Updating from a BIOS file

a. Select Update BIOS from a le, then click Next.

b. Locate the BIOS le from the Open window, then click Open.

3. Follow the onscreen instructions to complete the updating process.

2.1.2 ASUS EZ Flash 2

The ASUS EZ Flash 2 feature allows you to update the BIOS without using an OS-based
utility.

Before you start using this utility, download the latest BIOS le from the ASUS website at

www.asus.com.

To update the BIOS using EZ Flash 2:

1. Insert the USB ash disk that contains the latest BIOS le to the USB port, then launch

EZ Flash 2 in either of these two ways:

• Press <Alt> + <F2> during POST.

• Enter the BIOS setup program. Go to the Tools menu to select EZ Flash 2 and
press <Enter> to enable it.

Press <Tab> to switch between drives until the correct BIOS le is found.

ASUSTek EZ Flash 2 BIOS ROM Utility V4.14

Current ROM

BOARD: P7H55-M LX
VER: 0301 (H:00 B:00)
DATE: 07/12/2010

PATH: A:\

A:

Note

[Enter] Select or Load [Tab] Switch [V] Drive Info
[Up/Down/Home/End] Move [B] Backup [ESC] Exit

Update ROM

BOARD: Unknown
VER: Unknown
DATE: Unknown

2. When the correct BIOS le is found, EZ Flash 2 performs the BIOS update process

and automatically reboots the system when done.

2-2 Chapter 2: BIOS information

• This function supports USB ash disks with FAT 32/16 format and single partition only.

• DO NOT shut down or reset the system while updating the BIOS to prevent system boot
failure!

2.1.3 ASUS BIOS Updater

The ASUS BIOS Updater allows you to update BIOS in 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 in FAT32/16 format and

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.

• Do not save the BIOS le to a oppy disk due to low disk capacity.

3. Turn off the computer and disconnect all SATA hard disk drives (optional).

Booting the system in DOS environment

1. Insert the USB ash drive with the latest BIOS le and BIOS Updater to the USB port.

2. Boot your computer. When the ASUS Logo appears, press <F8> to show the BIOS
Boot Device Select Menu. Insert the support DVD into the optical drive and select the

optical drive as the boot device.

Please select boot device:

SATA:XXXXXXXXXXXXXXXX

CDROM:XXXXXXXXXXXXXXX

USB:XXXXXXXXXXXXXXXXX
Network:XXXXXXXXXXXXX

↑ and ↓ to move selection

ENTER to select boot device

ESC to boot using defaults

ASUS P7H55-M LE Series 2-3

3. When the Make Disk menu appears, select the FreeDOS command prompt item by
pressing the item number.

4. At the FreeDOS prompt, type d: and press <Enter> to switch the disk from

Drive C (optical drive) to Drive D (USB ash drive).

Welcome to FreeDOS (http://www.freedos.org)!
C:\>d:
D:\>

Backing up the current BIOS

To backup the current BIOS le using the BIOS Updater

Ensure that the USB ash drive is not write-protected and has at least 1024KB free space
to save the le.

1. At the FreeDOS prompt, type bupdater /o[lename] and press <Enter>.

D:\>bupdater /oOLDBIOS1.rom

Filename Extension

The [lename] is any user-assigned lename with no more than eight alphanumeric

characters for the lename and three alphanumeric characters for the extension.

2. The BIOS Updater backup screen appears indicating the BIOS backup process. When
BIOS backup is done, press any key to return to the DOS prompt.

ASUSTek BIOS Updater for DOS V1.00b [09/06/22]

Current ROM

BOARD: P7H55-M LX
VER: 0301
DATE: 07/12/2010

PATH: A:\

Update ROM

BOARD: Unknown
VER: Unknown
DATE: Unknown

BIOS backup is done! Press any key to continue.

Note

Saving BIOS:

2-4 Chapter 2: BIOS information

Updating the BIOS le

To update the BIOS le using BIOS Updater

1. At the FreeDOS prompt, type bupdater /pc /g and press <Enter>.

D:\>bupdater /pc /g

2. The BIOS Updater screen appears as below.

ASUSTek BIOS Updater for DOS V1.00b [09/06/22]

Current ROM

BOARD: P7H55-M LX
VER: 0301
DATE: 07/12/2010

PATH: A:\

A:

Note

[Enter] Select or Load [Tab] Switch [V] Drive Info
[Up/Down/Home/End] Move [B] Backup [Esc] Exit

P7H55MLX.ROM 2097152 2010-07-12 17:30:48

Update ROM

BOARD: Unknown
VER: Unknown
DATE: Unknown

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 conrm BIOS update.

Are you sure to update BIOS?

Yes No

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 1.04 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 Setup Defaults item under the Exit BIOS menu. See section 2.8 Exit
menu for details.

• Ensure to connect all SATA hard disk drives after updating the BIOS le if you have

disconnected them.

ASUS P7H55-M LE Series 2-5

2.1.4 ASUS CrashFree BIOS 3

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 BIOS le.

• Before using this utility, rename the BIOS le in the USB ash drive into

P7H55MLE.ROM (for P7H55-M LE), P7H55MLX.ROM (for P7H55-M LX), or
PH55MLX2.ROM (for P7H55-M LX2).

• 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 removable device that contains the

BIOS le to the USB port or to the oppy disk drive, if supported.

3. The utility automatically checks the devices for the BIOS le. When found, the utility
reads the BIOS le and starts ashing the corrupted BIOS le.

4. Turn off the system after the utility completes the updating process and turn on again.

DO NOT shut down or reset the system while updating the BIOS! Doing so can cause
system boot failure!

Ensure to load the BIOS default settings to ensure system compatibility and stability. Select
the Load Setup Defaults item under the Exit menu. Refer to section 2.8 Exit menu for
details.

2-6 Chapter 2: BIOS information

2.2 BIOS setup program

Use the BIOS Setup program to update the BIOS or congure 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>+<Delete> 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>+<Delete> keys to force
reset from a running operating system can cause damage to your data or system. We
recommend to always shut down the system properly from the operating system.

• The default BIOS settings for this motherboard apply for most conditions to ensure
optimum performance. If the system becomes unstable after changing any BIOS
settings, load the default settings to ensure system compatibility and stability. Select the
Load Setups Default item under the Exit Menu. See section 2.8 Exit Menu.

• 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.

ASUS P7H55-M LE Series 2-7

2.3 Main menu

When you enter the BIOS Setup program, the Main menu screen appears, giving you an
overview of the basic system information.

Main Advanced Power Boot Tools Exit

System Time [00:31:48]

System Date [Fri 04/10/2009]
Legacy Diskette A [1.44M, 3.5 in.]
Language [English]

SATA 1 :[Not Detected]
SATA 2 :[Not Detected]
SATA 3 :[Not Detected]
SATA 4 :[Not Detected]
SATA 5 :[Not Detected]
SATA 6 :[Not Detected]

Storage Conguration

System Information

v02.61 (C)Copyright 1985-2010, American Megatrends, Inc.

2.3.1 System Time [xx:xx:xx]

Allows you to set the system time.

2.3.2 System Date [Day xx/xx/xxxx]

Allows you to set the system date.

2.3.3 Legacy Diskette A [1.44M, 3.5 in.]

Sets the type of oppy drive installed. Conguration options: [Disabled] [360K, 5.25 in.]
[1.2M , 5.25 in.] [720K , 3.5 in.] [1.44M, 3.5 in.] [2.88M, 3.5 in.]

BIOS SETUP UTILITY

Use [ENTER], [TAB] or
[SHIFT-TAB] to select

a eld.

Use [+] or [-] to

congure system time.

Select Screen

Select Item
+- Change Field
Tab Select Field
F1 General Help
F10 Save and Exit
ESC Exit

This item appears only on P7H55-M LE.

2.3.4 Language [English]

Allows you to choose the display language in BIOS.
Conguration options: [繁體中文] [简体中文] [日本語] [Français] [Deutsch] [English]

2.3.5 SATA 1-6

While entering Setup, the BIOS automatically detects the presence of SATA devices. There
is a separate sub-menu for each SATA device. Select a device item then press <Enter> to
display the SATA device information.

The BIOS automatically detects the values opposite the dimmed items (Device, Vendor, Size,

LBA Mode, Block Mode, PIO Mode, Async DMA, Ultra DMA, and SMART Monitoring). These

values are not user-congurable. These items show N/A if no Serial ATA device is installed in

the system.

2-8 Chapter 2: BIOS information

Type [Auto]

Selects the type of SATA drive. Setting to [Auto] allows automatic selection of the appropriate

SATA device type. Select [CDROM] if you are specically conguring a CD-ROM drive. Select

[ARMD] (ATAPI Removable Media Device) if your device is either a ZIP, LS-120, or MO drive.

Conguration options: [Not Installed] [Auto] [CDROM] [ARMD]

This item does not appear if you select SATA 5/6 devices.

LBA/Large Mode [Auto]

Enables or disables the LBA mode. Setting to [Auto] enables the LBA mode if the device
supports this mode, and if the device was not previously formatted with LBA mode disabled.

Conguration options: [Disabled] [Auto]

Block (Multi-sector Transfer) M [Auto]

Enables or disables data multi-sectors transfers. When set to [Auto], the data transfer from
and to the device occurs multiple sectors at a time if the device supports multi-sector transfer
feature. When set to [Disabled], the data transfer from and to the device occurs one sector

at a time. Conguration options: [Disabled] [Auto]

PIO Mode [Auto]

Selects the PIO mode. Conguration options: [Auto] [0] [1] [2] [3] [4]

DMA Mode [Auto]

Selects the DMA mode. Conguration options: [Auto]

SMART Monitoring [Auto]

Sets the Smart Monitoring, Analysis, and Reporting Technology.

Conguration options: [Auto] [Disabled] [Enabled]

32Bit Data Transfer [Enabled]

Enables or disables 32-bit data transfer. Conguration options: [Disabled] [Enabled]

2.3.6 Storage Conguration

The items in this menu allow you to set or change the congurations for the SATA devices
installed in the system. Select an item then press <Enter> if you want to congure the item.

SATA Conguration [Enhanced]

Allows you to set the SATA conguration. Conguration options: [Disabled] [Compatible]

[Enhanced]

Configure SATA as [IDE]

Sets the conguration for the Serial ATA connectors supported by the Southbridge chip.
Conguration options: [IDE] [AHCI]

Due to Intel chipset driver support regulation, the AHCI mode is not supported in Windows
XP environment. The AHCI mode is only supported by Windows Vista/7 with OS built-in
driver.

ASUS P7H55-M LE Series 2-9

Hard Disk Write Protect [Disabled]

Disables or enables device write protection. This will be effective only if device is accessed

through BIOS. Conguration option: [Disabled] [Enabled]

IDE Detect Time Out (Sec) [35]

Selects the time out value for detecting ATA/ATAPI devices.

Conguration options: [0] [5] [10] [15] [20] [25] [30] [35]

2.3.7 System Information

This menu gives you an overview of the general system specications. The BIOS

automatically detects the items in this menu.

Bios Information

Displays the auto-detected BIOS information.

Processor

Displays the auto-detected CPU specication.

System Memory

Displays the auto-detected system memory.

2.4 Advanced menu

The Advanced menu items allow you to change the settings for the CPU and other system
devices.

Take caution when changing the settings of the Advanced menu items. Incorrect eld

values can cause the system to malfunction.

Main Advanced Power Boot Tools Exit

CPU Conguration

Chipset

Onboard Devices Conguration
USB Conguration

PCIPnP

Intel VT-d Conguration

BIOS SETUP UTILITY

Congure CPU.

2.4.1 CPU Conguration

The items in this menu show the CPU-related information that the BIOS automatically
detects.

Ratio CMOS Setting [Auto]

Sets the ration between CPU core clock and the FSB frequency. Key in ratio numbers
directly.

If an invalid ratio is set in CMOS, then the actual and set values may differ.

2-10 Chapter 2: BIOS information

C1E Support [Enabled]

Allows you to enable or disable C1E Support. Conguration options: [Disabled] [Enabled]

Hardware Prefetcher [Enabled]

Setting this item to [Enabled] allows the processor to fetch data and instructions from the
memory into the cache that are likely to be required in the near future. This reduces the

latency associated with memory reads. Conguration options: [Disabled] [Enabled]

Adjacent Cache Line Prefetch [Enabled]

When this item is set to [Enabled], the processor fetches the currently requested cache line,
as well as the subsequent cache line. This reduces the cache latency by making the next
cache line immediately available if the processor requires it as well. When set to [Disabled],

the processor fetches only the currently requested cache line. Conguration options:

[Disabled] [Enabled]

Max CPUID Value Limit [Disabled]

Setting this item to [Enabled] allows legacy operating systems to boot even without support

for CPUs with extended CPUID functions. Conguration options: [Disabled] [Enabled]

Intel® Virtualization Tech [Enabled]

Enables or disables Intel® Virtualization Technology. Virtualization enhanced by Intel®

Virtualization Technology allows a platform to run multiple operating systems and applications
in independent partitions. With virtualization, one computer system can function as multiple
virtual systems. Conguration options: [Enabled] [Disabled]

CPU TM function [Enabled]

Enables or disables Intel® CPU Thermal Monitor (TM) function, a CPU overheating protection
function. When enabled, the CPU core frequency and voltage are reduced when the CPU

overheats. Conguration options: [Disabled] [Enabled]

Execute-Disable Bit Capability [Enabled]

Allows you to enable or disable the No-Execution Page Protection Technology. Setting this
item to [Disabled] forces the XD feature ag to always return to zero (0). Conguration
options: [Disabled] [Enabled]

Active Processor Cores [All]

Allows you to choose the number of CPU cores to activate in each processor package.

Conguration options: [All] [1] [2]

A20M [Disabled]

Setting this item to [Enabled] allows Legacy OSes to be compatible with APs. Conguration
options: [Disabled] [Enabled]

The following item appears only when you installed an Intel® CPU that supports the
Enhanced Intel® SpeedStep® Technology (EIST).

ASUS P7H55-M LE Series 2-11

Intel(R) SpeedStep(TM) Tech [Enabled]

When this item is set to [Enabled], the CPU speed is controlled by the operating system.
When this item is set to [Disabled], the CPU runs at its default speed.

Conguration options: [Enabled] [Disabled]

Intel(R) TurboMode Tech [Enabled]

This item appears only if you set the CPU Ratio Setting item to [Auto]. Turbo mode allows

processor cores to run faster than marked frequency in specic condition. Conguration

options: [Disabled] [Enabled]

Intel(R) C-STATE Tech [Enabled]

Allows you enable or disable the Intel® C-STATE Technology. When enabled, the CPU idle is

set to C2/C3/C4/C6. Conguration options: [Disabled] [Enabled]

C State package limit setting [Auto]

This item appears only when you set the Intel® C-STATE Tech item to [Enabled]. We
recommend that you set this item to [Auto] for BIOS to automatically detect the C-State mode

supported by your CPU. Conguration options: [Auto] [C1] [C3] [C6]

2.4.2 Chipset

The Chipset menu allows you to change the advanced chipset settings. Select an item then
press <Enter> to display the submenu.

Uncore conguration

DRAM Frequency [Auto]

Allows you to adjust the DRAM frequency.

Conguration options: [Auto] [DDR3-800 MHz] [DDR3-1066 MHz] [DDR3-1333 MHz]

Memory Remap Feature [Enabled]

Allows you to enabled or disable the remapping of the overlapped PCI memory above
the total physical memory. Enable this option only when you install 64-bit operating

system. Conguration options: [Disabled] [Enabled]

Initiate Graphic Adapter [PCIE/PCI]

Allows you to decide which graphics controller to use as the primary boot device. The

conguration options for this item vary with CPUs. When a Lynneld CPU is installed,
the default setting is [PCIE/PCI]. The conguration options are [PCI/PCIE] [PCIE/PCI].
When a Clarkdale CPU is installed, the default setting is [PEG/PCI]. The conguration

options are [IGD] [PCI/IGD] [PCI/PEG] [PEG/IGD] [PEG/PCI].

2.4.3 Onboard Devices Conguration

HDA Controller [Enabled]

Allows you to enable or disable the high denition audio controller.
Conguration options: [Enabled] [Disabled]

Front Panel Type [HD Audio]

Allows you to select the front panel type. If High Denition Audio Front Panel used,
please set HD Audio mode. Conguration options: [AC97] [HD Audio]

2-12 Chapter 2: BIOS information

JMB368 IDE [Enabled]

Allows you to enable or disable the JMB368 IDE Controller.

Conguration options: [Disabled] [Enabled]

This item appears only on P7H55-M LE.

Onboard LAN [Enabled]

Allows you to enable or disable the onboard LAN controller.

Conguration options: [Enabled] [Disabled]

Onboard LAN Boot ROM [Disabled]

Allows you to enable or disable the boot ROM in the onboard LAN controller. This item
appears only when the Onboard LAN item is set to [Enabled]. Conguration options:
[Disabled] [Enabled]

Serial Port1 Address [3F8/IRQ4]

Allows you to select the Serial Port1 base address.

Conguration options: [Disabled] [3F8/IRQ4] [2F8/IRQ3] [3E8/IRQ4] [2E8/IRQ3]

The following items appear only on P7H55-M LE.

Serial Port2 Address [2F8/IRQ3]

Allows you to select the Serial Port2 base address.

Conguration options: [Disabled] [2F8/IRQ3] [3E8/IRQ4] [2E8/IRQ3]

Parallel Port Address [378]

Allows you to select the Parallel Port base addresses. Conguration options: [Disabled] [378]

[278]

Parallel Port Mode [ECP]

Allows you to select the Parallel Port mode.

Conguration options: [Normal] [EPP] [ECP] [EPP+ECP]

ECP Mode DMA Channel [DMA3]

Appears only when the Parallel Port Mode item is set to [ECP] or [EPP+ECP]. This

item allows you to set the Parallel Port ECP DMA. Conguration options: [DMA0]

[DMA1] [DMA3]

EPP Version [1.9]

Appears only when the Parallel Port Mode item is set to [EPP] or [EPP+ECP]. This

item allows you to select the EPP version. Conguration options: [1.9] [1.7]

Parallel Port IRQ [IRQ7]

Allows you to select parallel port IRQ. Conguration options: [IRQ5] [IRQ7]

ASUS P7H55-M LE Series 2-13

2.4.4 USB Conguration

The items in this menu allows you to change the USB-related features. Select an item then
press <Enter> to display the conguration options.

The Module Version and USB Devices Enabled items show the auto-detected values. If no
USB device is detected, the item shows None.

USB Functions [Enabled]

Allows you to disable or enable the USB functions. Conguration options: [Disabled]

[Enabled]

Legacy USB Support [Auto]

Allows you to enable or disable support for Legacy USB storage devices, including USB
ash drives and USB hard drives. Setting to [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. Conguration options: [Disabled]

[Enabled] [Auto]

BIOS EHCI Hand-off [Enabled]

Allows you to enable or disable the BIOS EHCI Hand-off function.

Conguration options: [Disabled] [Enabled]

The following items may only appear when a USB storage device is plugged.

USB Mass Storage Device Conguration

USB Mass Storage Reset Delay [20 Sec]

Allows you to set the maximum time that the BIOS waits for the USB storage device to

initialize. Conguration options: [10 Sec] [20 Sec] [30 Sec] [40 Sec]

Emulation Type [Auto]

Allows you to select the emulation type. Conguration options: [Auto] [Floppy] [Forced

2.4.5 PCI PnP

The PCI PnP menu items allow you to change the advanced settings for PCI/PnP devices.
The menu includes setting IRQ and DMA channel resources for either PCI/PnP or legacy ISA

devices, and setting the memory size block for legacy ISA devices.

Take caution when changing the settings of the PCI PnP menu items. Incorrect eld values

can cause the system to malfunction.

Plug and Play O/S [No]

When set to [No], BIOS congures all the devices in the system. When set to [Yes] and if you
install a Plug and Play operating system, the operating system congures the Plug and Play
devices not required for boot. Conguration options: [No] [Yes]

2-14 Chapter 2: BIOS information

2.4.6 Intel VT-d Conguration

Intel VT-d [Disabled]

Allows you to enable or disable the Intel® Virtualization Technology for Directed I/O.

Conguration options: [Disabled] [Enabled]

2.5 Power menu

The Power menu items allow you to change the settings for the Advanced Power
Management (APM). Select an item then press <Enter> to display the conguration options.

Main Advanced Power Boot Tools Exit

Suspend Mode [Auto]

ACPI 2.0 Support [Enabled]
ACPI APIC Support [Enabled]
Anti Surge Support [Disabled]

APM Conguration

Hardware Monitor

2.5.1 Suspend Mode [Auto]

Allows you to select the Advanced Conguration and Power Interface (ACPI) state to be used
for system suspend. Conguration options: [S1 (POS) Only] [S3 Only] [Auto]

[S1(POS) Only] - Enables the system to enter the ACPI S1 (Power on Suspend) sleep

state. In S1 sleep state, the system appears suspended and stays in a low power
mode. The system can be resumed at any time.
[S3 Only] - Enables the system to enter the ACPI S3 (Suspend to RAM) sleep state
(default). In S3 sleep state, the system appears to be off and consumes less power
than in the S1 state. When signaled by a wake-up device or event, the system resumes
to its working state exactly where it was left off.

[Auto] - Detected by OS.

2.5.2 ACPI 2.0 Support [Enabled]

Allows you to add more tables for Advanced Conguration and Power Interface (ACPI) 2.0
specications. Conguration options: [Disabled] [Enabled]

2.5.3 ACPI APIC Support [Enabled]

Allows you to enable or disable the Advanced Conguration and Power Interface (ACPI)
support in the Application-Specic Integrated Circuit (ASIC). When set to Enabled, the ACPI
APIC table pointer is included in the RSDT pointer list. Conguration options: [Disabled]

[Enabled]

2.5.4 Anti Surge Support [Disabled]

Allows you to enable or disable the Anti Surge function. Conguration options: [Disabled]

[Enabled]

BIOS SETUP UTILITY

Select the ACPI state
used for System
Suspend.

ASUS P7H55-M LE Series 2-15

2.5.5 APM Conguration

Restore on AC Power Loss [Power Off] (P7H55-M LE only)

When set to [Power Off], the system goes into off state after an AC power loss. When set
to [Power On], the system goes on after an AC power loss. When set to [Last State], the
system goes into either off or on state, whatever the system state was before the AC power

loss. Conguration options: [Power Off] [Power On] [Last State]

Power On By RTC Alarm [Disabled]

Allows you to enable or disable RTC to generate a wake event. When this item is set to
Enabled, the items RTC Alarm Date, RTC Alarm Hour, RTC Alarm Minute, and RTC Alarm

Second appear with set values. Conguration options: [Disabled] [Enabled]

Power On By External Modems [Disabled]

This allows either settings of [Enabled] or [Disabled] for powering up the computer when the

external modem receives a call while the computer is in Soft-off mode. Conguration options:

[Disabled] [Enabled]

Power On PCI Devices [Disabled]

When set to [Enabled], this parameter allows you to wake the system through a PCI LAN
or modem card. This feature requires an ATX power supply that provides at least 1A on the

+5VSB lead. Conguration options: [Disabled] [Enabled]

Power On PCIE Devices [Disabled]

When set to [Enabled], this parameter allows you to wake the system through a PCI Express
card. This feature requires an ATX power supply that provides at least 1A on the +5VSB lead.

Conguration options: [Disabled] [Enabled]

Power On By PS/2 KB [Disabled]

Allows you to use specic keys 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. Conguration

options: [Disabled] [Space Bar] [Ctrl-Esc] [Power Key]

Power On By PS/2 Mouse [Disabled]

When set to [Enabled], this parameter allows you to use the PS/2 mouse to turn on the
system. This feature requires an ATX power supply that provides at least 1A on the +5VSB

lead. Conguration options: [Disabled] [Enabled]

2.5.6 Hardware Monitor

CPU/MB Temperature [xxxºC/xxxºF] or [Ignored]

The onboard hardware monitor automatically detects and displays the motherboard and CPU
temperatures. Select Ignored if you do not wish to display the detected temperatures.

CPU/Chassis Fan Speed [xxxxRPM] or [Ignored]

The onboard hardware monitor automatically detects and displays the CPU/chassis fan

speed in rotations per minute (RPM). If the fan is not connected to the motherboard, the eld

shows N/A. Select Ignored if you do not wish to display the detected speed.

CPU Voltage, 3.3V Voltage, 5V Voltage, 12V Voltage [xxxV] or [Ignored]

The onboard hardware monitor automatically detects the voltage output through the onboard
voltage regulators.

2-16 Chapter 2: BIOS information

CPU/Chassis Q-Fan Function [Enabled]

Allows you to enable or disable the CPU/Chassis Q-Fan function.

Conguration options: [Disabled] [Enabled]

CPU/Chassis Q-Fan Mode [Optimal]

Allows you to select CPU/Chassis Q-Fan mode.

Conguration options: [Performance] [Optimal] [Silent]

2.6 Boot menu

The Boot menu items allow you to change the system boot options. Select an item then
press <Enter> to display the sub-menu.

Main Advanced Power Boot Tools Exit

Boot Settings

Boot Device Priority

Boot Settings Conguration

Security

2.6.1 Boot Device Priority

1st ~ xxth Boot Device

These items specify the boot device priority sequence from the available devices. The
number of device items that appears on the screen depends on the number of devices

installed in the system. Conguration options: [1st FLOPPY DRIVE] (for P7H55-M LE) /

[Removable Dev.] (for P7H55-M LX) [Hard Drive] [ATAPI CD-ROM] [Disabled]

BIOS SETUP UTILITY

Species the Boot

Device Priority
sequence.

A virtual drive (Drive
B:) may appear when you
set the CD-ROM drive as

the rst boot device.

• To select the boot device suring system startup, press <F8> when ASUS Logo appears.

• To access Windows® OS in Safe Mode, do any of the following:

• Press <F5> when ASUS Logo appears.

• Press <F8> after POST.

2.6.2 Boot Settings Conguration

Quick Boot [Enabled]

Enabling this item allows the BIOS to skip some power on self tests (POST) while booting to
decrease the time needed to boot the system. When set to [Disabled], BIOS performs all the

POST items. Conguration options: [Disabled] [Enabled]

Full Screen Logo [Enabled]

This allows you to enable or disable the full screen logo display feature. Conguration

options: [Disabled] [Enabled]

Set this item to [Enabled] to use the ASUS MyLogo2™ feature.

ASUS P7H55-M LE Series 2-17

AddOn ROM Display Mode [Force BIOS]

Sets the display mode for option ROM. Conguration options: [Force BIOS]
[Keep Current]

Bootup Num-Lock [On]

Allows you to select the power-on state for the NumLock.

Conguration options: [Off] [On]

Wait For ‘F1’ If Error [Enabled]

When set to Enabled, the system waits for the F1 key to be pressed when error occurs.

Conguration options: [Disabled] [Enabled]

Hit ‘DEL’ Message Display [Enabled]

When set to [Enabled], the system displays the message Press DEL to run Setup during

POST. Conguration options: [Disabled] [Enabled]

2.6.3 Security

The Security menu items allow you to change the system security settings. Select an item
then press <Enter> to display the conguration options.

Change Supervisor Password

Select this item to set or change the supervisor password. The Supervisor Password item
on top of the screen shows the default Not Installed. After you set a password, this item
shows Installed.

To set a Supervisor Password:

1. Select the Change Supervisor Password item and press <Enter>.

2. On the password box, key in a password containing up to six letters, or numbers, or

both, then press <Enter>.

3. Conrm the password when prompted.

The message Password Installed appears after you successfully set your password.
To change the supervisor password, follow the same steps in setting a supervisor password.
To clear the supervisor password, select the Change Supervisor Password then press

<Enter> twice. The message Password uninstalled appears.

If you forget your BIOS password, you can clear it by erasing the CMOS Real Time Clock
(RTC) RAM. See section 1.6 Jumpers for information on how to erase the RTC RAM.

After you have set a supervisor password, the other items appear to allow you to change
other security settings.

User Access Level [Full Access]

This item allows you to select the access restriction to the Setup items.

Conguration options: [No Access] [View Only] [Limited] [Full Access]

[No Access] - prevents user access to the Setup utility.
[View Only] - allows access but does not allow change to any eld.
[Limited] - allows changes only to selected elds, such as Date and Time.
[Full Access] - allows viewing and changing all the elds in the Setup utility.

2-18 Chapter 2: BIOS information

Change User Password

Select this item to set or change the user password. The User Password item on top of the
screen shows the default Not Installed. After you set a password, this item shows Installed.

To set a User Password:

1. Select the Change User Password item and press <Enter>.

2. On the password box, key in a password containing up to six letters, or numbers, or

both, then press <Enter>.

3. Conrm the password when prompted.

The message Password Installed appears after you set your password successfully.
To change the user password, follow the same steps in setting a user password.

Clear User Password

Select this item to clear the user password.

Password Check [Setup]

When set to [Setup], BIOS checks for user password when accessing the Setup utility. When
set to [Always], BIOS checks for user password both when accessing Setup and booting the

system. Conguration options: [Setup] [Always]

2.7 Tools menu

The Tools menu items allow you to congure options for special functions. Select an item then

press <Enter> to display the sub-menu.

Main Advanced Power Boot Tools Exit

ASUS EZ Flash 2

BIOS SETUP UTILITY

Press ENTER to run the
utility to select andd
update BIOS.
This utility supports

1. FAT 12/16/32 (R/W)

2. NTFS (read only)

3. CD-DISC (read only)

ASUS EZ Flash 2

Allows you to run ASUS EZ Flash 2. When you press <Enter>, a conrmation message
appears. Use the left/right arrow key to select between [Yes] or [No], then press <Enter> to

conrm your choice. Please see section 2.1.2 for details.

ASUS P7H55-M LE Series 2-19

2.8 Exit menu

The Exit menu items allow you to load the optimal or failsafe default values for the BIOS
items, and save or discard your changes to the BIOS items.

Main Advanced Power Boot Tools Exit

Exit Options

Exit & Save Changes

Exit & Discard Changes
Discard Changes

Load Setup Defaults

Pressing <Esc> does not immediately exit this menu. Select one of the options from this
menu or <F10> from the legend bar to exit.

Exit & Save Changes

Once you are nished making your selections, choose this option from the Exit menu to

ensure the values you selected are saved to the CMOS RAM. An onboard backup battery
sustains the CMOS RAM so it stays on even when the PC is turned off. When you select this

option, a conrmation window appears. Select OK to save changes and exit.

Exit & Discard Changes

Select this option only if you do not want to save the changes that you made to the Setup

program. If you made changes to elds other than System Date, System Time, and
Password, the BIOS asks for a conrmation before exiting.

Discard Changes

This option allows you to discard the selections you made and restore the previously saved
values. After selecting this option, a conrmation appears. Select OK to discard any changes
and load the previously saved values.

Load Setup Defaults

This option allows you to load the default values for each of the parameters on the Setup
menus. When you select this option or if you press <F5>, a conrmation window appears.
Select OK to load default values. Select Exit & Save Changes or make other changes
before saving the values to the non-volatile RAM.

BIOS SETUP UTILITY

Exit system setup
after saving the
cahnges.

F10 key can be used
for this operation.

2-20 Chapter 2: BIOS information

P7P55/P7H57/P7H55 series motherboards installation notices

Intel® LGA1156 processor and chipset combination instruction

Chipset

H57/H55

P55 Discrete VGA card required Discrete VGA card required

* Only available for motherboards with this function.

CPU type

Memory conguration

Clarkdale CPU (with integrated
GPU)

• Integrated GPU enabled

• HDMI/DVI/D-Sub ports enabled*

Lynneld CPU

Discrete VGA card required

Chipset

1 DIMM

2 DIMMs

4 DIMMs

CPU type

Clarkdale CPU (with integrated
GPU)

supports one module inserted
into ANY slot as Single-channel

memory conguration

supports two modules inserted into
either the blue slots or the black
slots as one pair of Dual-channel

memory conguration

supports four modules inserted into both the blue and the black slots as two

pairs of Dual-channel memory conguration

Lynneld CPU

supports one module inserted into Slot
A1 or B1 as Single-channel memory

conguration

supports two modules inserted into the
blue slots (A1 and B1) as one pair of

Dual-channel memory conguration

Congurations for the PCI Express x16 slots

According to Intel® CPU spec, the PCIe x 6_2 slot of the H57/H55 chipset will be disabled
when using Clarkdale CPU. Refer to the table below for details.

Chipset PCI Express x16 slot

PCIe x16_1 (blue) O O

H57/H55

P55

* The color of the PCIe x16_2 slot varies by model.
** The PCIe x16_2 slot can work at maximum x8 link only.

PCIe x16_2 (white)* X O

PCIe x16_2 (black)* O O

PCIe x16_1 (blue) No limitation No limitation

PCIe x16_2 (white)* No limitation No limitation

PCIe x16_2 (black)* No limitation No limitation

PCIe x16_3* (black) No limitation No limitation

Clarkdale CPU (with
integrated GPU)

CPU type

Lynneld CPU

ASUS P7H55-M LE Series 2-21

ASUS contact information

ASUSTeK COMPUTER INC.

Address 15 Li-Te Road, Peitou, Taipei, Taiwan 11259
Telephone [phone]
Fax [phone]

E-mail [email protected]

Web site www.asus.com.tw

Technical Support

Telephone [phone]
Online support support.asus.com

ASUS COMPUTER INTERNATIONAL (America)

Address 800 Corporate Way, Fremont, CA 94539, USA
Telephone [phone]
Fax [phone]
Web site usa.asus.com

Technical Support

Telephone [phone]
Support fax [phone]
Online support support.asus.com

ASUS COMPUTER GmbH (Germany and Austria)

Address Harkort Str. 21-23, D-40880 Ratingen, Germany
Fax [phone]
Web site www.asus.de
Online contact www.asus.de/sales

Technical Support

Telephone (Component) [phone]
Telephone (System/Notebook/Eee/LCD) [phone]
Support Fax [phone]
Online support support.asus.com

* EUR 0.14/minute from a German xed landline; EUR 0.42/minute from a mobile phone.

2-22 Chapter 2: BIOS information

*
*

EC Declaration of Conformity

We, the undersigned,

Manufacturer:

ASUSTek COMPUTER INC.

Address, City:

No. 150, LI-TE RD., PEITOU, TAIPEI 112, TAIWAN R.O.C.

Country:

TAIWAN

Authorized representative in Europe:

ASUS COMPUTER GmbH

Address, City: HARKORT STR. 21-23, 40880 RATINGEN

Country:

GERMANY

declare the following apparatus:

Product name :

Motherboard

Model name :

P7H55-M LE/SI;P7H55-M LX;P7H55-M LX2

conform with the essential requirements of the following directives:

2004/108/EC-EMC Directive

EN 55022:2006+A1:2007

EN 61000-3-2:2006

EN 55013:2001+A1:2003+A2:2006

EN 55024:1998+A1:2001+A2:2003

EN 61000-3-3:2008

EN 55020:2007

1999/5/EC-R &TTE Directive

EN 300 328 V1.7.1(2006-05)

EN 300 440-1 V1.4.1(2008-05)

EN 300 440-2 V1.2.1(2008-03)

EN 301 511 V9.0.2(2003-03)

EN 301 908-1 V3.2.1(2007-05)

EN 301 908-2 V3.2.1(2007-05)

EN 301 893 V1.4.1(2005-03)

EN 50360:2001

EN 50371:2002

EN 62311:2008

EN 50385:2002

EN 301 489-1 V1.8.1(2008-04)

EN 301 489-3 V1.4.1(2002-08)

EN 301 489-4 V1.3.1(2002-08)

EN 301 489-7 V1.3.1(2005-11)

EN 301 489-9 V1.4.1(2007-11)

EN 301 489-17 V1.3.2(2008-04)

EN 301 489-24 V1.4.1(2007-09)

EN 302 326-2 V1.2.2(2007-06)

EN 302 326-3 V1.3.1(2007-09)

EN 301 357-2 V1.3.1(2006-05)

2006/95/EC-LVD Directive

EN 60950-1:2001+A11:2004

EN 60950-1:2006

EN60065:2002+A1:2006

EN 60950-1:2006+A11:2009

2009/125/EC-ErP Directive

Regulation (EC) No. 1275/2008

EN 62301:2005

Regulation (EC) No. 642/2009

EN 62301:2005

Regulation (EC) No. 278/2009

EN 62301:2005

CE marking

Declaration Date: Jul. 21, 2010

Year to begin affixing CE marking:2010

Position : CEO

Name : Jerry Shen

Signature : __________

(

EC conformit

y

markin

g)

DECLARATION OF CONFORMITY

Per FCC Part 2 Section 2. 1077(a)

Responsible Party Name: Asus Computer International

Address: 800 Corporate Way, Fremont

, CA 94539.

Phone/Fax No: [phone]/[phone]

hereby declares that the product

Product Name : Motherboard

Model Number : P7H55-M LE/SI, P7H55-M LX, P7H55-M LX2

Conforms to the following specifications:

FCC Part 15, Subpart B, Unintentional Radiators

FCC Part 15, Subpart C, Intentional Radiators

FCC Part 15, Subpart E, Intentional Radiators

Supplementary Information:

This device complies with part 15 of the FCC Rules. Operation is subject to

the following two conditions: (1) This device may not cause harmful

interference, and (2) this device must accept any interference received,

including interference that may cause undesired operation.

Representative Personʼs Name : Steve Chang / President

Signature :

Date : - XO. 21, 2010

ASUS P7H55-M LE Series 2-23