Asus P7H55-M SI User manual

Motherboard
P7H55-M SI

ii
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,
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 identication or explanation and to the
owners’ benet, without intent to infringe.
E5311
Second Edition V2
January 2010
Offer to Provide Source Code of Certain Software
This product contains copyrighted software that is licensed under the General Public License (“GPL”)
and under the Lesser General Public License Version (“LGPL”). The GPL and LGPL licensed code in this
product is distributed without any warranty. Copies of these licenses are included in this product.
You may obtain the complete corresponding source code (as dened in the GPL) for the GPL Software,
and/or the complete corresponding source code of the LGPL Software (with the complete machine-
readable “work that uses the Library”) for a period of three years after our last shipment of the product
including the GPL Software and/or LGPL Software, which will be no earlier than December 1, 2011, 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 notication to the email address [email protected], stating the
product and describing the problem (please do NOT send large attachments such as source code archives
etc to this email address).

iii
Contents
Notices.......................................................................................................... v
Safety information ...................................................................................... vi
About this guide ......................................................................................... vi
P7H55-M SI 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 x1 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........................................................................ 1-18
1.8.1 Installing an operating system ...................................... 1-18
1.8.2 Support DVD information .............................................. 1-18
Chapter 2: BIOS information
2.1 Managing and updating your BIOS ............................................ 2-1
2.1.1 ASUS Update utility ........................................................ 2-1
2.1.2 ASUS EZ Flash 2 utility................................................... 2-2
2.1.3 ASUS BIOS Updater....................................................... 2-3
2.1.4 ASUS CrashFree BIOS................................................... 2-6

iv
Contents
2.2 BIOS setup program .................................................................... 2-7
2.3 Main menu .................................................................................... 2-8
2.3.1 System Time .................................................................. 2-8
2.3.2 System Date .................................................................. 2-8
2.3.3 Legacy Diskette A .......................................................... 2-8
2.3.4 Language ........................................................................ 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 TPM Conguration ........................................................ 2-15
2.4.7 Intel VT-d Conguration ................................................ 2-15
2.5 Power menu................................................................................ 2-16
2.5.1 Suspend Mode.............................................................. 2-16
2.5.2 ACPI 2.0 Support ......................................................... 2-16
2.5.3 ACPI APIC Support....................................................... 2-16
2.5.4 Anti Surge Support ....................................................... 2-16
2.5.5 APM Conguration........................................................ 2-16
2.5.6 Hardware Monitor ......................................................... 2-17
2.6 Boot menu .................................................................................. 2-18
2.6.1 Boot Device Priority ...................................................... 2-18
2.6.2 Boot Settings Conguration .......................................... 2-18
2.6.3 Security ......................................................................... 2-19
2.7 Tools menu ................................................................................. 2-20
ASUS EZ Flash 2......................................................................... 2-20
2.8 Exit menu.................................................................................... 2-21

v
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://green.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.

vi
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.
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.
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.

vii
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.
NOTE: Tips and additional information to help you complete a task.
IMPORTANT: Instructions that you MUST follow to 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.
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>

viii
CPU LGA1156 socket for Intel®Core™ i7/ Core™ i5 processors
Supports Intel®45nm Multi-Core CPU
Chipset Intel®H55 Express Chipset
Memory 4 x DIMM, max. 16GB, DDR3 1333/1066 MHz, non-ECC,
un-buffered memory
Dual channel memory architecture
* 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 OS.
** Refer to www.asus.com for the latest Memory QVL
(Qualied Vendors List).
Expansion Slots 1 x PCIe 2.0 x16 slot
1 x PCIe 2.0 x1 slot
2 x PCI slots
Graphics Integrated Intel®Graphics Media Accelerator (Intel® GMA4500)
support:
- D-SUB Max. resolution: 2048 x 1536 @75Hz
- DVI Max. resolution: 1920 x 1200 @60Hz
- HDMI Max. resolution: 1920 x 1200 @60Hz
Supports Microsoft® DirectX 10
Storage Intel®H55 Express Chipset:
- 6 x Serial ATA 3.0 Gb/s connectors
- 1 x Ultra DMA 133/100 connector
LAN RTL8112L Gigabit LAN controller
Audio VIA VT1708S 8-channel High Denition Audio CODEC
Supports Jack-Detection, Multi-streaming, and Anti-pop
function
USB Supports up to 12 USB 2.0 ports (6 ports at mid-board,
6 ports at the back panel)
ASUS Unique
Features
ASUS EZ Flash 2
ASUS Q-Fan2
ASUS MyLogo 2
ASUS CrashFree BIOS3
ASUS Anti Surge
P7H55-M SI specications summary
(continued on the next page)

ix
P7H55-M SI specications summary
Back Panel I/O Ports 1 x PS/2 Keyboard port
1 x PS/2 Mouse port
1 x HDMI port
1 x DVI port
1 x VGA port
1 x COM port
1 x RJ45 port
6 x USB 2.0/1.1 ports
3 x Audio jacks
Internal I/O Connectors 3 x USB 2.0/1.1 connectors support additional
6 USB 2.0/1.1 ports
6 x SATA connectors
1 x S/PDIF Out connector
1 x COM connector
1 x CPU fan connector
1 x Chassis fan connector
1 x Front panel audio connector
1 x IDE connector
1 x TPM connector
1 x System panel connector
1 x LPT connector
1 x Floppy connector
1 x 24-pin EATX power connector
1 x 4-pin ATX 12V power connector
BIOS 64Mb Flash ROM, AMI BIOS, PnP, DMI2.0, WfM2.0,
SM BIOS 2.5, ACPI2.0a, Multi-language BIOS
Manageability WOL, PXE, PME Wake up, WOR by Ring
Accessories 1 x UltraDMA 133/100 cable
2 x Serial ATA 3.0Gb/s cables
1 x I/O shield
1 x Support DVD
1 x User Manual
Support DVD Drivers
ASUS PC Probe II
ASUS Update
Anti-Virus software (OEM version)
Form Factor uATX form factor: 9.6 in x 9.6 in (24.4cm x 24.4cm)
*Specications are subject to change without notice.

x

Chapter 1
Product introduction
Thank you for buying an ASUS®P7H55-M SI 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.
P7H55-M SI
SB_PWR
ON
Standby Power Powered Off
OFF
P7H55-M SI Onboard LED
1-1ASUS P7H55-M SI

1.2 Motherboard overview
1.2.1 Motherboard layout
Place eight 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.
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.
1.2.2 Layout contents
Connectors/Jumpers/Slots/LED Page Connectors/Jumpers/Slots/LED Page
1. CPU and Chassis fan connectors (4-pin CPU_FAN,
3-pin CHA_FAN)
1-12 10. USB connectors (10-1 pin USB78, USB910,
USB1112)
1-10
2. ATX power connectors (24-pin EATXPWR, 4-pin
ATX12V)
1-13 11. Onboard LED 1-1
3. Serial port connectors (10-1 pin COM2) 1-16 12. Clear RTC RAM (3-pin CLRTC) 1-8
4. Intel®CPU socket 13. Chassis intrusion connector (4-1 pin
CHASSIS)
1-12
5. DDR3 DIMM sockets 1-3 14. Floppy disk drive connector (34-1 pin
FLOPPY)
1-15
6. TPM connector (20-1 pin TPM) 1-14 15. LPT connector (26-1 pin LPT) 1-16
7. IDE connector (40-1 pin PRI_IDE) 1-17 16. Digital audio connector (4-1 pin
SPDIF_OUT)
1-11
8. Serial ATA connectors (7-pin SATA1-6) 1-11 17. Front panel audio connector (10-1 pin AAFP) 1-15
9. System panel connector (10-1 pin F_PANEL) 1-14
Place this side towards
the rear of the chassis.
P7H55-M SI
FLOPPY
PCIEX16
PCIEX1_1
PCI2
PCI1
USB1112 USB910 USB78
AAFP
ATX12V
EATXPWR
CPU_FAN
Lithium Cell
CMOS Power
Super
I/O
VIA
VT1708S
RTL
8112L
ICS
9LRS954
KBMS
HDMI
COM1
8Mb
BIOS
SB_PWR
CLRTC
CHASSIS
24.4cm(9.6in)
24.4cm(9.6in)
Intel®
GMA4500
DDR3 DIMM_B2 (64bit, 240-pin module) DDR3 DIMM_B1 (64bit, 240-pin module) DDR3 DIMM_A2 (64bit, 240-pin module) DDR3 DIMM_A1 (64bit, 240-pin module)
SATA1 SATA2
SATA3 SATA4
SATA5 SATA6
DVI
AUDIO
VGA
LAN1_USB12
USB3_6
CHA_FAN
SPDIF_OUT
LGA1156
LPT
F_PANEL
PRI_IDE
TPM
COM2
2 3 4 11 5
11 10121314151617
8
2
7
6
9
Chapter 1: Product introduction1-2

1.3 Central Processing Unit (CPU)
This motherboard comes with a surface mount LGA1156 socket designed for the
Intel®Core™ i7 / Core™ i5 processors.
1.4 System memory
1.4.1 Overview
This motherboard comes with four 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:
P7H55-M SI
P7H55-M SI 240-pin DDR3 DIMM sockets
DIMM_A2 DIMM_A1 DIMM_B2 DIMM_B1
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.
1-3ASUS P7H55-M SI

1.4.2 Memory congurations
You may install 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.
• For dual-channel conguration, you can:
- install two identical DIMMs in DIMM_A1 and DIMM_B1; or
- install four identical DIMMs in all four slots; or
- install one identical DIMM pair in DIMM_A1 and DIMM_B1 (blue slots) and
another identical DIMM pair in DIMM_A2 and DIMM_B2 (black slots).
• 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:
- Install a maximum of 3GB system memory if you are using a 32-bit Windows®
OS.
- 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.
Vendor Part No. Size SS/
DS Chip Brand Chip No.
Timing
DIMM
(BIOS)
Voltage
DIMM
Support
A* B* C*
A-Data AD31333001GOU 1024MB SS A-Data AD30908C8D-151C E0906 - - • • •
A-Data AD31333G001GOU 3072MB(Kit of 3) SS - Heat-Sink Package 8-8-8-24 1.65-
1.85V
• • •
A-Data AD31333002GOU 2048MB DS A-Data AD30908C8D-151C E0903 - - • • •
A-Data AD31333G002GMU 2048MB DS - Heat-Sink Package 8-8-8-24 1.65-
1.85V
• • •
Apacer 78.A1GC6.9L1 2048MB DS APACER AM5D5808DEWSBG - - • • •
CORSAIR CM3X1024-1333C9DHX 1024MB SS - Heat-Sink Package 9-9-9-24 1.60V • • •
CORSAIR CM3X1024-1333C9 1024MB SS - Heat-Sink Package - - • • •
CORSAIR TR3X3G1333C9 G 3072MB(Kit of 3) SS - Heat-Sink Package 9-9-9-24 1.50V • • •
CORSAIR TR3X3G1333C9 G 3072MB(Kit of 3) SS - Heat-Sink Package 9-9-9-24 1.50V • • •
CORSAIR TR3X3G1333C9 3072MB(Kit of 3) SS - Heat-Sink Package 9 1.5V • • •
CORSAIR CM3X1024-1333C9DHX 1024MB DS Corsair Heat-Sink Package - - • • •
CORSAIR CM3X2048-1333C9DHX 2048MB DS - Heat-Sink Package - - • • •
CORSAIR TW3X4G1333C9 G 4096MB(Kit of 2) DS - Heat-Sink Package 9-9-9-24 1.50V • • •
Crucial CT12864BA1339.8FF 1024MB SS Micron 9FF22D9KPT 9 - • • •
Crucial BL12864TA1336.8SFB1 2048MB(Kit of 2) SS - Heat-Sink Package 6-6-6-20 1.8V • • •
Crucial CT25664BA1339.16FF 2048MB DS Micron 9KF27D9KPT 9 - • • •
Crucial BL25664ABA1336.16SFB1 4096MB(Kit of 2) DS - Heat-Sink Package 6-6-6-20 1.8V • • •
Crucial BL25664BN1337.16FF (XMP) 6144MB(Kit of 3 ) DS - Heat-Sink Package 7-7-7-24 1.65V • • •
ELPIDA EBJ10UE8EDF0-DJ-F 1024MB SS ELPIDA J1108EDSE-DJ-F - 1.35V(low
voltage)
• • •
P7H55-M SI Motherboard Qualied Vendors List (QVL)
DDR3-1333MHz capability
(continued on the next page)
Chapter 1: Product introduction1-4

(continued on the next page)
Vendor Part No. Size SS/
DS Chip Brand Chip No.
Timing
DIMM
(BIOS)
Voltage
DIMM
Support
A* B* C*
G.SKILL F3-10600CL8D-2GBHK 1024MB SS G.SKILL Heat-Sink Package - - • • •
G.SKILL F3-10600CL9D-2GBPK 1024MB SS G.SKILL Heat-Sink Package - - • • •
G.SKILL F3-10666CL7T-3GBPK 3072MB(Kit of 3) SS - Heat-Sink Package 7-7-7-18 1.5~1.6V • • •
G.SKILL F3-10600CL7D-2GBPI(XMP) 1024MB DS G.SKILL Heat-Sink Package - - • • •
G.SKILL F3-10600CL9D-2GBNQ 1024MB DS G.SKILL Heat-Sink Package - - • • •
G.SKILL F3-10666CL8D-
4GBECO(XMP)
4096MB(Kit of 2 ) DS - Heat-Sink Package 8-8-8-
8-24
1.35V(low
voltage)
• • •
G.SKILL F3-10666CL8D-4GBHK(XMP) 4096MB(Kit of 2 ) DS - Heat-Sink Package 8-8-8-21 1.5-1.6V • • •
G.SKILL F3-10666CL7T-6GBPK(XMP) 6144MB(Kit of 3 ) DS - Heat-Sink Package 7-7-7-18 1.5~1.6V • • •
GEIL DDR3-1333 CL9-9-9-24 1024MB SS - Heat-Sink Package 9 - • • •
GEIL GV34GB1333C7DC 2048MB DS - Heat-Sink Package 7-7-7-24 1.5V • • •
GEIL GG34GB1333C9DC 4096MB(Kit of 2) DS GEIL GL1L128M88BA12N 9-9-9-24 1.3V(low
voltage)
• • •
GEIL DDR3-1333 CL9-9-9-24 6144MB(Kit of 3 ) DS - Heat-Sink Package 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 MT18JTF25664AZ-1G4F1 2048MB DS Micron 9KF27D9KPT 9 - • • •
OCZ OCZ3P13332GK 2048MB(Kit of 2) SS - Heat-Sink Package 7-7-7-20 1.8V • • •
OCZ OCZ3X1333LV3GK(XMP) 3072MB(Kit of 3) SS - Heat-Sink Package - 1.6V • • •
OCZ OCZ3G13334GK 4096MB(Kit of 2) DS - Heat-Sink Package - 1.7V • • •
OCZ OCZ3P13334GK 4096MB(Kit of 2) DS - Heat-Sink Package 7-7-7-20 1.8V • • •
OCZ OCZ3P1333LV4GK 4096MB(Kit of 2) DS - Heat-Sink Package 7-7-7-20 1.65V • • •
OCZ OCZ3X13334GK(XMP) 4096MB(Kit of 2) DS - Heat-Sink Package 7-7-7-20 1.75V • • •
OCZ OCZ3G1333LV6GK 6144MB(Kit of 3 ) DS - Heat-Sink Package 9-9-9-20 1.65V • • •
OCZ OCZ3P1333LV6GK 6144MB(Kit of 3 ) DS - Heat-Sink Package 7-7-7-20 1.65V • • •
OCZ OCZ3X1333LV6GK(XMP) 6144MB(Kit of 3 ) DS - Heat-Sink Package 8-8-8-20 1.60V • • •
PSC AL7F8G73D-DG1 1024MB SS PSC A3P1GF3DGF928M9B05 - - • • •
PSC AL8F8G73D-DG1 2048MB DS PSC A3P1GF3DGF928M9B05 - - • • •
SAMSUNG M378B2873DZ1-CH9 1024MB SS SAMSUNG SEC 846 HCH9 K4B1G08460 - - • • •
SAMSUNG M378B2873EH1-CH9 1024MB SS SAMSUNG SEC 913 HCH9
K4B1G0846E
- - • • •
SAMSUNG M378B5673DZ1-CH9 2048MB DS SAMSUNG K4B1G0846D-HCH9 - - • • •
SAMSUNG M378B5673EH1-CH9 2048MB DS SAMSUNG SEC 913 HCH9
K4B1G0846E
- - • • •
Transcend TS256MLK64V3U 2048MB DS Micron 9GF27D9KPT - - • • •
Transcend TS256MLK64V3U 2048MB DS - SEC816HCH9K4B1G0846D - - • • •
ASINT SLY3128M8-EDJ 1024MB SS ASINT DDRII1208-DJ 0844 - - • • •
ASINT SLY3128M8-EDJE 1024MB SS ELPIDA J1108BASE-DJ-E - - • • •
BUFFALO FSX1333D3G-K2G 1024MB SS - Heat-Sink Package 7-7-7-20 - • • •
Century PC3-10600 DDR3-1333 9-9-9 2048MB DS Micron 8DD22D9JNM - - • • •
Elixir M2Y2G64CB8HA9N-CG 2048MB DS - Heat-Sink Package 7-7-7-20 - • • •
Elixir M2Y2G64CB8HC9N-CG 2048MB DS Elixir Heat-Sink Package - - • • •
Kingtiger 2GB DIMM PC3-10666 2048MB DS SAMSUNG SEC 904 HCH9
K4B1G0846D
- - • • •
DDR3-1333MHz capability
1-5ASUS P7H55-M SI

DDR3-1333MHz capability
DDR3-1066MHz capability
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 either the blue or black slots as one
pair of Dual-channel memory conguration.
• C*: Supports two pairs of modules inserted into both the blue and black slots as two
pairs of Dual-channel memory conguration.
Visit the ASUS website at www.asus.com for the latest QVL.
Vendor Part No. Size SS/DS Chip Brand Chip No.
Timing
DIMM
(BIOS)
Voltage
DIMM
Support
A* B* C*
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 • • •
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 K4B1G0846E - - • • •
SAMSUNG M378B5273BH1-CF8 4096MB DS SAMSUNG 846 K4B2G0846B-HCF8 - - • • •
Elixir M2Y2G64CB8HC5N-BE 2048MB DS Elixir N2CB1G80CN-BE - - • • •
Elixir M2Y2G64CBHA9N-BE 2048MB DS - Heat-Sink Package 7-7-7-20 - • • •
Elixir M2Y2G64CBHC9N-BE 2048MB DS Elixir Heat-Sink Package - - • • •
Kingtiger 2GB DIMM PC3-8500 2048MB DS Hynix H5TQ1G83AFP G7C - - • • •
Vendor Part No. Size SS/
DS Chip Brand Chip No.
Timing
DIMM
(BIOS)
Voltage
DIMM
Support
A* B* C*
Kingtiger KTG2G1333PG3 2048MB DS - Heat-Sink Package - - • • •
PATRIOT PSD31G13332H 1024MB DS - Heat-Sink Package 9 - • • •
PATRIOT PSD31G13332 1024MB DS Patriot PM64M8D38U-15 - - • • •
PATRIOT PSD32G13332H 2048MB DS - Heat-Sink Package - - • • •
PATRIOT PDC34G1333ELK 4096MB(Kit of 2 ) DS - Heat-Sink Package 9-9-9-24 1.5V • • •
SILICON
POWER
SP001GBLTU133S01 1024MB SS NANYA NT5CB128M8AN-CG 9 - • • •
SILICON
POWER
SP001GBLTU133S02 1024MB SS elixir N2CB1680AN-C6 9 - • • •
SILICON
POWER
SP002GBLTU133S02 2048MB DS elixir N2CB1680AN-C6 9 - • • •
TAKEMS TMS1GB364D081-107EY 1024MB SS - Heat-Sink Package 7-7-7-20 1.5V • • •
TAKEMS TMS1GB364D081-138EY 1024MB SS - Heat-Sink Package 8-8-8-24 1.5V • • •
TAKEMS TMS2GB364D081-107EY 2048MB DS - Heat-Sink Package 7-7-7-20 1.5V • • •
TAKEMS TMS2GB364D081-138EY 2048MB DS - Heat-Sink Package 8-8-8-24 1.5V • • •
TAKEMS TMS2GB364D082-138EW 2048MB DS - Heat-Sink Package 8-8-8-24 1.5V • • •
Chapter 1: Product introduction1-6

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.
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 x1 slot
This motherboard supports PCI Express x1 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.
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.
1-7ASUS P7H55-M SI

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.
P7H55-M SI
P7H55-M SI Clear RTC RAM
1 2 2 3
Normal
(Default)
Clear RTC
CLRTC
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.
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.
Chapter 1: Product introduction1-8

1.7 Connectors
1.7.1 Rear panel ports
1. PS/2 Mouse port. This port is for a PS/2 mouse.
2. COM port. 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.
25 6
7
3
11
4
810 9
1
12
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
LAN port LED indications
LAN port
SPEED
LED
ACT/LINK
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
1-9ASUS P7H55-M SI

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. 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. 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.
P7H55-M SI
P7H55-M SI 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 8-channel audio, use the chassis with HD audio module in the front panel to
support 8-channel audio output.
Chapter 1: Product introduction1-10