No part of this manual, including the products and software described in it, may be reproduced,
transmitted, transcribed, stored in a retrieval system, or translated into any language in any form or by any
means, except documentation kept by the purchaser for backup purposes, without the express written
permission of ASUSTeK COMPUTER INC. (“ASUS”).
Product warranty or service will not be extended if: (1) the product is repaired, modied or altered, unless
such repair, modication of alteration is authorized in writing by ASUS; or (2) the serial number of the
product is defaced or missing.
ASUS PROVIDES THIS MANUAL “AS IS” WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS
OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OR CONDITIONS OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL ASUS, ITS
DIRECTORS, OFFICERS, EMPLOYEES OR AGENTS BE LIABLE FOR ANY INDIRECT, SPECIAL,
INCIDENTAL, OR CONSEQUENTIAL DAMAGES (INCLUDING DAMAGES FOR LOSS OF PROFITS,
LOSS OF BUSINESS, LOSS OF USE OR DATA, INTERRUPTION OF BUSINESS AND THE LIKE),
EVEN IF ASUS HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES ARISING FROM ANY
DEFECT OR ERROR IN THIS MANUAL OR PRODUCT.
SPECIFICATIONS AND INFORMATION CONTAINED IN THIS MANUAL ARE FURNISHED FOR
INFORMATIONAL USE ONLY, AND ARE SUBJECT TO CHANGE AT ANY TIME WITHOUT NOTICE,
AND SHOULD NOT BE CONSTRUED AS A COMMITMENT BY ASUS. ASUS ASSUMES NO
RESPONSIBILITY OR LIABILITY FOR ANY ERRORS OR INACCURACIES THAT MAY APPEAR IN THIS
MANUAL, INCLUDING THE PRODUCTS AND SOFTWARE DESCRIBED IN IT.
Products and corporate names appearing in this manual may or may not be registered trademarks or
copyrights of their respective companies, and are used only for identication or explanation and to the
owners’ benet, without intent to infringe.
ii
Contents
Contents ...................................................................................................................... iii
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 modications 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.
viii
Safety information
Electrical safety
• To prevent electrical shock hazard, disconnect the power cable from the electrical outlet
before relocating the system.
• When adding or removing devices to or from the system, ensure that the power cables
for the devices are unplugged before the signal cables are connected. If possible,
disconnect all power cables from the existing system before you add a device.
• Before connecting or removing signal cables from the motherboard, ensure that all
power cables are unplugged.
• Seek professional assistance before using an adapter or extension cord. These devices
could interrupt the grounding circuit.
• Ensure that your power supply is set to the correct voltage in your area. If you are not sure
about the voltage of the electrical outlet you are using, contact your local power company.
• If the power supply is broken, do not try to x it by yourself. Contact a qualied service
technician or your retailer.
• The optical S/PDIF is an optional component (may or may not be included in your
motherboard) and is dened as a CLASS 1 LASER PRODUCT.
INVISIBLE LASER RADIATION, AVOID EXPOSURE TO BEAM.
• Never dispose of the battery in re. It could explode and release harmful substances into
the environment.
• Never dispose of the battery with your regular household waste. Take it to a hazardous
material collection point.
• Never replace the battery with an incorrect battery type.
• RISK OF EXPLOSION IF BATTERY IS REPLACED BY AN INCORRECT TYPE.
• DISPOSE OF USED BATTERIES ACCORDING TO THE ABOVE BATTERY-RELATED
INSTRUCTIONS.
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 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.
This motherboard should only be used in environments with ambient temperatures between
5°C (41°F) and 40°C (104°F).
• Place the product on a stable surface.
• If you encounter technical problems with the product, contact a qualied service
technician or your retailer.
ix
About this guide
This user guide contains the information you need when installing and conguring the motherboard.
How this guide is organized
This guide contains the following parts:
• Chapter 1: Product introduction
This chapter describes the features of the motherboard and the new technology it
supports.
• Chapter 2: Hardware information
This chapter lists the hardware setup procedures that you have to perform when
installing system components. It includes description of the switches, jumpers, and
connectors on the motherboard.
• Chapter 3: BIOS setup
This chapter tells how to change system settings through the BIOS Setup menus.
Detailed descriptions of the BIOS parameters are also provided.
• Chapter 4: Software support
This chapter describes the contents of the support DVD that comes with the
motherboard package and the software.
• Chapter 5: Multiple GPU technology support
This chapter describes how to install and congure multiple ATI® CrossFireX™ and
NVIDIA® SLI™ graphics cards.
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.
x
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.
Typography
Bold text Indicates a menu or an item to select.
Italic
s 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> + <Del>
xi
P7P55D EVO specications summary
CPULGA1156 socket for Intel® Core™ i7 / Core™ i5 Processors
ManageabilityWfM 2.0, DMI 2.0, WOL by PME, WOR by PME, PXE
Support DVD contentsDrivers
Form factorATX form factor: 12 in. x 9.6 in. (30.5 cm x 24.4 cm)
*Specications are subject to change without notice.
1 x PS/2 mouse port (green)
1 x Clear CMOS button
1 x Coaxial S/PDIF Out port
1 x Optical S/PDIF Out port
1 x IEEE 1394a port
1 x External SATA port
2 x LAN (RJ-45) ports
8 x USB 2.0/1.1 ports
8-channel Audio I/O ports
1 x IDE connector
6 x SATA connectors
2 x Drive Xpert SATA connectors (dark blue and gray)
1 x CPU Fan connector
2 x Chassis Fan connectors (1 x 4-pin, 1 x 3-pin)
1 x Power Fan connector
1 x IEEE1394a connector
1 x COM connector
Front panel audio connector
1 x S/PDIF Out header
CD audio in
24-pin ATX Power connector
8-pin EATX 12V Power connector
System Panel (Q-Connector)
1 x MemOK! button
1 x Power on switch
1 x Reset switch
SM BIOS 2.5, ACPI 2.0a, Multi-language BIOS,
ASUS EZ Flash 2, ASUS CrashFree BIOS 3
ASUS Utilities
ASUS Update
Anti-virus software (OEM version)
xiv
Chapter 1
User Manual
Chapter 1: Product introduction
1.1 Welcome!
Thank you for buying an ASUS® P7P55D EVO motherboard!
The motherboard delivers a host of new features and latest technologies, making it another
standout in the long line of ASUS quality motherboards!
Before you start installing the motherboard, and hardware devices on it, check the items in
your package with the list below.
1.2 Package contents
Check your motherboard package for the following items.
Chapter 1
ASUS P7P55D EVO
motherboard
4 x Serial ATA 3.0 Gb/s cables
1 x ASUS Q-Shield
• If any of the above items is damaged or missing, contact your retailer.
• The illustrated items above are for reference only. Actual product specications may
vary with different models.
User guideSupport DVD
1 x Ultra DMA 133/
100/66 cable
1 x ASUS SLI™ bridge
connector
1 x 2-port USB 2.0 and 1-port
eSATA module
1 x 2-in-1 ASUS Q-Connector
kit
ASUS P7P55D EVO1-1
1.3 Special features
1.3.1 Product highlights
Chapter 1
Intel® LGA1156 Lynneld Processor Ready
This motherboard supports the latest Intel® Lynneld processors in LGA1156 package, which
has memory and PCI Express controller integrated to support 2-channel (4 DIMMs) DDR3
memory and 16 PCI Express 2.0 lanes, providing great graphics performance. Intel® Lynneld
processor is one of the most powerful and energy efcient CPU in the world. Refer to page
2-5 for details.
Intel® P55
The Intel® P55 Express Chipset is the latest one-chipset design to support the latest 1156
socket Intel® Core™ i7 / Core™ i5 processors. Intel® P55 provides improved performance by
utilizing serial point-to-point links, allowing increased bandwidth and stability.
PCIe 2.0
This motherboard supports the latest PCIe 2.0 devices for double speed and bandwidth that
enhances system performance. Refer to page 2-22 for details.
Quad-GPU SLI™ and Quad-GPU CrossFireX™ support!
P7P55D EVO brings you the multi-GPU choice of either SLI™ or CrossFireX™. The
motherboard features the most powerful Intel® P55 platform to optimize PCIe allocation in
multiple GPU congurations. Expect a brand-new gaming style you’ve never experienced
before! Refer to Chapter 5 for details.
Dual-Channel DDR3 2133(O.C.) / 1600 / 1333 / 1066 support
The motherboard supports DDR3 memory that features data transfer rates of 2133(O.C.) /
1600 / 1333 / 1066 MHz to meet the higher bandwidth requirements of the latest 3D graphics,
multimedia, and Internet applications. The dual-channel DDR3 architecture enlarges the
bandwidth of your system memory to boost system performance. Refer to page 2-10 for
details.
Green ASUS
This motherboard and its packaging comply with the European Union’s Restriction on the
use of Hazardous Substances (RoHS). This is in line with the ASUS vision of creating
environment-friendly and recyclable products/packaging to safeguard consumers’ health
while minimizing the impact on the environment.
1-2Chapter 1: Product Introduction
1.3.2 ASUS Xtreme Design—Hybrid Processor
TurboV EVO
The ultimate O.C. processor satises every level of overclockers—from die-hard enthusiasts
to beginners. Auto tuning intelligently pushes the system to the fastest clock speeds while
maintaining stability. Turbo Key boosts performance with just one touch; while TurboV offers
more options to advanced overclockers to achieve world O.C. record. Refer to page 4-10 for
details.
Auto Tuning
Auto Tuning is an intelligent tool that automates overclocking to achieve a total system level
up. This tool also provides stability testing. Even O.C. beginners can achieve extreme yet
stable overclocking results with Auto Tuning! Refer to page 4-11 for details.
1.3.3 ASUS Xtreme Design—Hybrid Phase
T.Probe
The T.Probe microchip detects and balances power phase loading and temperature in real-
time. This feature optimizes the power phase functions, allowing components to run at lower
temperatures and extending their lifespan.
ASUS 12+2 Phase Power Design
The groundbreaking 12+2 phase VRM design is brought to the ASUS motherboards. 12+2
phase power design, 12-phase for vCore and extra 2-phase for Memory controller inside
CPU can provide the highest power efciency, and hence generates less heat to effectively
enhance the overclocking capability. With the high quality power components such as low
RDS (on) MOSFETs, Ferrite core chokes with lower hysteresis loss and 100% Japan-made
high quality conductive polymer capacitors, ASUS 12+2 phase VRM design also ensure
longer component life and minimum power loss.
1.3.4 ASUS Xtreme Design—Hybrid OS
Express Gate
Express Gate is an ASUS exclusive OS that provides you with quick access to the Internet and
key applications before entering the Windows® OS. Refer to page 3-35 and 4-7 for details.
Chapter 1
1.3.5 ASUS Exclusive Features
ASUS Drive Xpert
Without BIOS setups, the ASUS exclusive Drive Xpert is ideal for anyone who needs to
secure data on their hard drives or enhance hard drive performances without the hassles of
complicated congurations. With Drive Xpert’s user-friendly graphical user interface, you can
easily arrange hard drive backups or enhance their hard drive transfer rates—ensuring that
data is looked after every moment, every day. Refer to page 2-33, 3-33 and 4-9 for details.
ASUS P7P55D EVO1-3
MemOK!
Memory compatibility is among the top concerns during computer upgrades. Worry no more.
Chapter 1
MemOK! is the fastest memory booting solution today. This remarkable memory rescue tool
requires nothing but a push of a button to patch memory issues and get your system up and
running in no time. The technology is able to determine failsafe settings that can dramatically
improve your system booting success. Refer to page 2-25 for details.
ASUS EPU
The ASUS EPU (Energy Processing Unit) provides total system power management by
detecting current PC loadings and intelligently moderating power usage for critical PC
components in real-time–helping save power and money! Refer to page 4-6 for details.
ASUS Quiet Thermal Solutions
ASUS Quiet Thermal solution makes system more stable and enhances the overclocking
capability.
ASUS Fanless Design—Heat-pipe solution
The Heat Pipe design effectively directs the heat generated by the vCore area to the
heatsink near the back IO ports, where it can be carried away by existing airow from
CPU fan. The purpose of the innovative heat pipe design on this motherboard is that
the groundbreaking fanless design does not have lifetime problems as a chipset fan
does. The Heat Pipe design is the most reliable fanless thermal solution to date.
Fan Xpert
ASUS Fan Xpert intelligently allows you to adjust both the CPU and chassis fan speeds
according to different ambient temperatures caused by different climate conditions
in different geographic regions and your PC’s loading. The built-in variety of useful
proles offer exible controls of fan speed to achieve a quiet and cool environment.
Refer to page 4-5 for details.
DO NOT uninstall the heat-pipe by yourself. Doing so may bend the tubing and affect the
heat dissipation performance.
ASUS Crystal Sound
This feature can enhance speech-centric applications like Skype, online game, video
conference and recording.
ASUS Noise Filter
This feature detects repetitive and stationary noises like computer fans, air
conditioners, and other background noises then eliminates it in the incoming audio
stream while recording.
1-4Chapter 1: Product Introduction
DTS Surround Sensation UltraPC
DTS Surround Sensation UltraPC delivers exceptional 5.1 surround experience
through the most common PC audio setups—your existing stereo speakers or
headphones. In addition to virtual surround, “Bass enhancement” provides stronger low
frequency bass sound, and “Voice clarication” provides clear human dialogue even
with loud background sound. With these technologies, you may experience a better
home-theater audio with ease.
ASUS EZ DIY
ASUS EZ DIY feature collection provides you with easy ways to install computer components,
update the BIOS or back up your favorite settings.
ASUS Onboard Switch
With an easy press during overclocking, the exclusive onboard switches allow gamers
to effortless ne-tune the performance without having to short the pins! Refer to page
2-24 for details.
ASUS Q-Design
ASUS Q-Design enhances your DIY experience. All of Q-LED, Q-Slot and Q-DIMM
design speed up and simplify the DIY process!
ASUS Q-Shield
ASUS Q-Shield’s special design makes it convenient and easy to install on your
motherboard. With better electric conductivity, it ideally protects your motherboard
against static electricity and shields it against Electronic Magnetic Interference (EMI).
ASUS Q-Connector
ASUS Q-Connector allows you to easily connect or disconnect the chassis front panel
cables to the motherboard. This unique module eliminates the trouble of connecting
the system panel cables one at a time and avoiding wrong cable connections. Refer to
page 2-40 for details.
ASUS EZ-Flash 2
ASUS EZ Flash 2 is a user-friendly utility that allows you to update the BIOS without
using a bootable oppy disk or an OS-based utility. Refer to page 3-4 for details.
ASUS O.C. Prole
The motherboard features the ASUS O.C. Prole that allows you to conveniently store
or load multiple BIOS settings. The BIOS settings can be stored in the CMOS or a
separate le, giving you the freedom to share and distribute your favorite settings.
Refer to page 3-32 for details.
Chapter 1
ASUS MyLogo2™
This feature allows you to convert your favorite photo into a 256-color boot logo for a more
colorful and vivid image on your screen.
ASUS Multi-language BIOS
The multi-language BIOS allows you to select the language of your choice from the available
options. The localized BIOS setup menu helps you congure your system easier and faster.
ASUS P7P55D EVO1-5
Chapter 1
1-6Chapter 1: Product Introduction
Chapter 2
Chapter 2: Hardware information
2.1 Before you proceed
Take note of the following precautions before you install motherboard components or change
any motherboard settings.
• Unplug the power cord from the wall socket before touching any component.
• Before handling components, use a grounded wrist strap or touch a safely grounded
object or a metal object, such as the power supply case, to avoid damaging them due
to static electricity.
• Hold components by the edges to avoid touching the ICs on them.
• Whenever you uninstall any component, place it on a grounded antistatic pad or in the
bag that came with the component.
• Before you install or remove any component, ensure that the ATX power supply is
switched off or the power cord is detached from the power supply. Failure to do so
may cause severe damage to the motherboard, peripherals, or components.
Chapter 2
ASUS P7P55D EVO2-1
2.2 Motherboard overview
2.2.1 Motherboard layout
Chapter 2
Refer to
2.7 Connectors
connectors.
2-2Chapter 2: Hardware information
for more information about rear panel connectors and internal
2.2.2 Layout contents
Connectors/Jumpers/SlotsPage
1. ATX power connectors (24-pin EATXPWR, 8-pin EATX12V)
2. LGA1156 CPU Socket
3. DDR3 DIMM slots
4. DRAM overvoltage setting switch (OV_DRAM)
5. CPU, chassis, and power fan connectors (4-pin CPU_FAN,
4-pin CHA_FAN1, 3-pin CHA_FAN2, 3-pin PWR_FAN)
6. Serial port connector (10-1 pin COM1)
7. MemOK! switch
8. IDE connector (40-1 pin PRI_EIDE)
9. Intel
10. JMicron
11. System panel connector (20-8 pin PANEL)
12. USB connectors (10-1 pin USB910, USB1112, USB1314)
13. Reset switch
14. Power-on switch
15. IEEE 1394a port connector (10-1 pin IE1394_2)
16. Optical drive audio connector (4-pin CD)
17. Front panel audio connector (10-1 pin AAFP)
18. Digital audio connector (4-1 pin SPDIF_OUT)
®
P55 Serial ATA 3.0 Gb/s connectors (7-pin SATA1–6 [Blue])2-32
®
JMB322 Serial ATA RAID connectors
(7-pin SATA_E1 [gray], 7-pin SATA_E2 [dark blue])
2-38
2-5
2-10
2-26
2-36
2-35
2-25
2-31
2-33
2-39
2-34
2-24
2-24
2-35
2-34
2-37
2-37
Chapter 2
ASUS P7P55D EVO2-3
2.2.3 Placement direction
When installing the motherboard, ensure that you place it into the chassis in the correct
orientation. The edge with external ports goes to the rear part of the chassis as indicated in
the image below.
2.2.4 Screw holes
Place nine screws into the holes indicated by circles to secure the motherboard to the
chassis.
Chapter 2
DO NOT overtighten the screws! Doing so can damage the motherboard.
Place this side towards
the rear of the chassis
2-4Chapter 2: Hardware information
2.3 Central Processing Unit (CPU)
A
B
The motherboard comes with a surface mount LGA1156 socket designed for the Intel®
Core™ i7 / Core™ i5 processor.
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.
2.3.1 Installing the CPU
To install a CPU:
1. Locate the CPU socket on the motherboard.
Chapter 2
2. Press the load lever with your thumb (A),
and then move it to the right (B) until it is
Load lever
released from the retention tab.
To prevent damage to the socket pins,
do not remove the PnP cap unless you
are installing a CPU.
Retention tab
ASUS P7P55D EVO2-5
3. Lift the load lever in the direction of the
arrow until the load plate is completely
lifted.
Chapter 2
4. Remove the PnP cap from the CPU
socket.
Load plate
PnP cap
5. Position the CPU over the socket,
ensuring that the gold triangle is on the
bottom-left corner of the socket, and then
t the socket alignment keys into the CPU
CPU notches
notches.
The CPU ts in only one correct
orientation. DO NOT force the CPU
into the socket to prevent bending
the connectors on the socket and
damaging the CPU!
2-6Chapter 2: Hardware information
Gold
triangle
mark
Alignment keys
6. Apply some Thermal Interface Material
C
B
A
to the exposed area of the CPU that the
heatsink will be in contact with, ensuring
that it is spread in an even thin layer.
Some heatsinks come with pre-applied
thermal paste. If so, skip this step.
The Thermal Interface Material is
toxic and inedible. DO NOT eat it. If
it gets into your eyes or touches your
skin, wash it off immediately, and seek
professional medical help.
7. Close the load plate (A), and then push
down the load lever (B), ensuring that
the front edge of the load plate slides
under the retention lock (C).
Chapter 2
8. Insert the load lever under the retention
tab.
ASUS P7P55D EVO2-7
2.3.2 Installing the CPU heatsink and fan
The Intel® LGA1156 processor requires a specially designed heatsink and fan assembly to
ensure optimum thermal condition and performance.
Chapter 2
• When you buy a boxed Intel® processor, the package includes the CPU fan and
heatsink assembly. If you buy a CPU separately, ensure that you use only Intel®-certied
multi-directional heatsink and fan.
®
• Your Intel
• Use an LGA1156-compatible CPU heatsink and fan assembly only. The LGA1156
If you purchased a separate CPU heatsink and fan assembly, ensure that the Thermal
Interface Material is properly applied to the CPU heatsink or CPU before you install the
heatsink and fan assembly.
Ensure that you have installed the motherboard to the chassis before you install the CPU
fan and heatsink assembly.
LGA1156 heatsink and fan assembly comes in a push-pin design and does
not require any tool to install.
socket is incompatible with the LGA775 and LGA1366 sockets in size and dimension.
To install the CPU heatsink and fan:
1. Place the heatsink on top of the installed
CPU, ensuring that the four fasteners
match the holes on the motherboard.
B
A
B
2. Push down two fasteners at a time in
a diagonal sequence to secure the
heatsink and fan assembly in place.
A
B
2-8Chapter 2: Hardware information
B
1
A
Orient the heatsink and fan assembly such that the CPU fan cable is closest to the CPU fan
connector.
A
1
3. Connect the CPU fan cable to the connector on the motherboard labeled CPU_FAN.
DO NOT forget to connect the CPU fan connector! Hardware monitoring errors can occur if
you fail to plug this connector.
2.3.3 Uninstalling the CPU heatsink and fan
To uninstall the CPU heatsink and fan:
1. Disconnect the CPU fan cable from the
connector on the motherboard.
2. Rotate each fastener counterclockwise.
3. Pull up two fasteners at a time in a
diagonal sequence to disengage the
heatsink and fan assembly from the
motherboard.
B
A
B
A
Chapter 2
A
B
B
A
4. Carefully remove the heatsink and fan assembly from the motherboard.
ASUS P7P55D EVO2-9
2.4 System memory
2.4.1 Overview
The motherboard comes with four Double Data Rate 3 (DDR3) Dual Inline Memory Modules
(DIMM) sockets.
A DDR3 module has the same physical dimensions as a DDR2 DIMM but is notched
differently to prevent installation on a DDR2 DIMM socket. DDR3 modules are developed for
better performance with less power consumption.
The gure illustrates the location of the DDR3 DIMM sockets:
Chapter 2
Recommended memory congurations
One DIMM:
Install one memory module in slot A1 or B1 rst as a single-channel operation.
Two DIMMs (dual-channel operation):
Four DIMMs (dual-channel operation):
2-10Chapter 2: Hardware information
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