Asus P5QL SE User manual

Motherboard
P5QL SE

ii
E4159
First Edition V1
September 2008
Copyright © 2008 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.

iii
Contents
Notices......................................................................................................... vi
Safety information ..................................................................................... vii
About this guide ........................................................................................ vii
P5QL SE specications summary............................................................. ix
Chapter 1: Product introduction
1.1 Welcome! ...................................................................................... 1-1
1.2 Package contents......................................................................... 1-1
1.3 Special features............................................................................ 1-1
1.3.1 Product highlights ........................................................... 1-1
1.3.2 ASUS unique features .................................................... 1-2
1.3.3 ASUS Stylish features..................................................... 1-2
1.3.4 ASUS Intelligent Overclocking features .......................... 1-3
1.4 Before you proceed ..................................................................... 1-3
1.5 Motherboard overview................................................................. 1-4
1.5.1 Placement direction ........................................................ 1-4
1.5.2 Screw holes .................................................................... 1-4
1.5.3 Motherboard layout ......................................................... 1-5
1.5.4 Layout contents............................................................... 1-6
1.6 Central Processing Unit (CPU) ................................................... 1-6
1.6.1 Installing the CPU ........................................................... 1-7
1.6.2 Installing the CPU heatsink and fan................................ 1-9
1.6.3 Uninstalling the CPU heatsink and fan ......................... 1-10
1.7 System memory ......................................................................... 1-10
1.7.1 Overview ....................................................................... 1-10
1.7.2 Memory congurations...................................................1-11
1.7.3 Installing a DIMM .......................................................... 1-15
1.7.4 Removing a DIMM ........................................................ 1-16
1.8 Expansion slots.......................................................................... 1-16
1.8.1 Installing an expansion card ......................................... 1-16
1.8.2 Conguring an expansion card ..................................... 1-17
1.8.3 PCI slots........................................................................ 1-17
1.8.4 PCI Express x1 slots..................................................... 1-17
1.8.5 PCI Express x16 slot..................................................... 1-17
1.9 Jumpers ...................................................................................... 1-17

iv
Contents
1.10 Connectors ................................................................................. 1-18
1.10.1 Rear panel connectors.................................................. 1-18
1.10.2 Internal connectors ....................................................... 1-20
1.11 Software support........................................................................ 1-26
1.11.1 Installing an operating system ...................................... 1-26
1.11.2 Support DVD information .............................................. 1-26
Chapter 2: BIOS information
2.1 Managing and updating your BIOS ............................................ 2-1
2.1.1 ASUS Update utility ........................................................ 2-1
2.1.2 Creating a bootable oppy disk....................................... 2-3
2.1.3 ASUS EZ Flash 2 utility................................................... 2-3
2.1.4 AFUDOS utility................................................................ 2-4
2.1.5 ASUS CrashFree BIOS 3 utility ...................................... 2-6
2.2 BIOS setup program .................................................................... 2-8
2.2.1 BIOS menu screen.......................................................... 2-9
2.2.2 Menu bar......................................................................... 2-9
2.2.3 Navigation keys............................................................... 2-9
2.2.4 Menu items ................................................................... 2-10
2.2.5 Sub-menu items............................................................ 2-10
2.2.6 Conguration elds ....................................................... 2-10
2.2.7 Pop-up window ............................................................. 2-10
2.2.8 Scroll bar....................................................................... 2-10
2.2.9 General help ................................................................. 2-10
2.3 Main menu .................................................................................. 2-11
2.3.1 System Time ..................................................................2-11
2.3.2 System Date ..................................................................2-11
2.3.3 Legacy Diskette A ..........................................................2-11
2.3.4 SATA 1-4..........................................................................................2-11
2.3.5 Storage Conguration ................................................... 2-12
2.3.6 System Information ....................................................... 2-13
2.4 Advanced menu ......................................................................... 2-13
2.4.1 JumperFree Conguration ............................................ 2-13
2.4.2 CPU Conguration ........................................................ 2-16
2.4.3 Chipset.......................................................................... 2-17
2.4.4 Onboard Devices Conguration.................................... 2-17

v
Contents
2.4.5 USB Conguration ........................................................ 2-18
2.4.6 PCI PnP ........................................................................ 2-18
2.5 Power menu................................................................................ 2-19
2.5.1 Suspend Mode.............................................................. 2-19
2.5.2 ACPI 2.0 Support .......................................................... 2-19
2.5.3 ACPI APIC Support....................................................... 2-19
2.5.4 APM Conguration........................................................ 2-19
2.5.5 Hardware Monitor ......................................................... 2-20
2.6 Boot menu .................................................................................. 2-21
2.6.1 Boot Device Priority ...................................................... 2-21
2.6.2 Boot Settings Conguration .......................................... 2-21
2.6.3 Security ......................................................................... 2-22
2.7 Tools menu ................................................................................. 2-23
2.7.1 ASUS EZ Flash 2.......................................................... 2-23
2.7.2 AI NET 2........................................................................ 2-23
2.8 Exit menu.................................................................................... 2-24

vi
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.
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.

vii
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 adpater or extension cord. These devices
could interrupt the grounding circuit.
• Make sure 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, make sure 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 setup
This chapter tells how to change system settings through the BIOS Setup menus.
Detailed descriptions of the BIOS parameters are also provided.

viii
Where to nd more information
Refer to the following sources for additional information and for product and software
updates.
1. ASUS websites
The ASUS website provides updated information on ASUS hardware and software
products. Refer to the ASUS contact information.
2. Optional documentation
Your product package may include optional documentation, such as warranty yers,
that may have been added by your dealer. These documents are not part of the
standard package.
Conventions used in this guide
To make sure 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.
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>
Command Means that you must type the command exactly as shown,
then supply the required item or value enclosed in brackets.
Example: At the DOS prompt, type the command line:
afudos /i[lename]
afudos /iP5QLSE.ROM

ix
P5QL SE specications summary
CPU LGA775 socket for Intel®Core™2 Extreme /
Core™2 Quad / Core™2 Duo / Pentium®Dual-Core /
Celeron®Dual-Core / Celeron®processors
Compatible with Intel®05B/05A/06 processors
Supports Intel®45nm multi-core CPU
Chipset Intel®P43 / ICH10 with Intel®Fast Memory Access
Technology
System bus 1600 (O.C.) / 1333 /1066 / 800MHz
Memory Dual-channel memory architecture
- 2 x 240-pin DIMM sockets support unbuffered
non-ECC DDR2 1066 / 800 / 667MHz memory
modules
- Supports up to 8GB system memory
* Refer to www.asus.com or this user manual for the
Memory QVL (Qualied Vendors Lists)
** When you install a total memory of 4GB or more,
Windows® 32-bit operating system may only recognize
less than 3GB. Hence, a total installed memory of less
than 3GB is recommended if you are using a Windows
32-bit operating system.
Expansion slots 1 x PCI Express™ x16 slot
2 x PCI Express x1 slots
3 x PCI slots
Storage Intel ICH10 southbridge supports:
- 4 x Serial ATA 3Gb/s ports
JMB368 PATA controller supports:
- 1 x UltraDMA 133/100/66 for up to 2 PATA devices
LAN PCIe Gigabit LAN controller
Audio Realtek® ALC662 6-channel High-Denition Audio CODEC
- Supports Jack-detect and Multi-streaming
- Onboard S/PDIF header
USB 12 x USB 2.0 ports (6 at mid-board, 6 at back panel)
ASUS unique features ASUS EZ DIY:
- ASUS CrashFree BIOS 3
- ASUS EZ Flash 2
(continued on the next page)

x
P5QL SE specications summary
Other features ASUS MyLogo2
Rear panel ports 1 x PS/2 keyboard port
1 x Parallel port
1 x COM port
1 x LAN (RJ-45) port
6 x USB 2.0/1.1 ports
6-channel audio I/O ports
Internal connectors 3 x USB connectors support 6 additional USB ports
1 x Floppy disk drive connector
1 x IDE connector
4 x Serial ATA connectors
1 x CPU fan connector
1 x S/PDIF Out header
1 x Speaker connector
1 x Front panel audio connector
1 x CD audio in connector
1 x 24-pin ATX power connector
1 x 4-pin ATX 12V power connector
1 x System panel connector
BIOS features 8Mb Flash ROM, AMI BIOS, PnP, DMI 2.0, WfM 2.0,
SM BIOS 2.5, ACPI 2.0a, ASUS EZ Flash 2,
ASUS CrashFree BIOS 3
Manageability WfM 2.0, DMI 2.0, WOL by PME, WOR by PME, PXE
Accessories 1 x UltraDMA 133/100/66 cable
1 x Serial ATA cable
1 x Serial ATA power cable
1 x I/O shield
User Manual
Support DVD Drivers
ASUS PC Probe II
ASUS Update
Anti-Virus software (OEM version)
Form factor ATX form factor: 12 in x 7.6 in (30.5 cm x 19.3 cm)
*Specications are subject to change without notice.

ASUS P5QL SE 1-1
Chapter 1
Product introduction
1.1 Welcome!
Thank you for buying an ASUS®P5QL SE 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.
Motherboard ASUS P5QL SE motherboard
Cables 1 x Serial ATA cable
1 x Serial ATA power cable
1 x Ultra DMA 133/100/66 cable
Accessories 1 x I/O shield
Application CD ASUS motherboard Support DVD
Documentation User Manual
If any of the above items is damaged or missing, contact your retailer.
1.3 Special features
1.3.1 Product highlights
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.
Intel®Core™2 Extreme / Core™2 Quad /
Core™2 Duo CPU support
This motherboard supports the latest Intel®Core™2 Extreme / Core™2 Quad /
Core™2 Duo processors in the LGA775 package. With the latest Intel Core™
microarchitecture technology and 1600(O.C.)/1333/1066/800MHz Front Side Bus (FSB), the
Intel®Core™2 processors are among the most powerful CPUs in the world. See page 1-6 for
details.

1-2 Chapter 1: Product introduction
Intel®P43 chipset
The Intel®P43 Express Chipset is designed to support dual-channel DDR2
1066/800/667MHz architecture, 1333/1066/800 FSB, PCIe 2.0, and multi-core CPUs. It
supports the Intel Fast Memory Access technology that signicantly optimizes the use of
available memory bandwidth and reduces the latency of the memory accesses.
PCIe 2.0 support
This motherboard supports the latest PCIe 2.0 devices for double speed and bandwidth
which enhances system performance.
FSB 1600 (O.C.) support
ASUS’s exclusive overclocking design now unleashes the ultimate potential of the
Intel®Core™2 processors. With the Intel®45nm microarchitecture technology and
1600(O.C.)/1333/1066/800MHz FSB, this motherboard allows you to enjoy the latest
technology supported by one of the most powerful CPUs in the world.
Serial ATA 3Gb/s technology
This motherboard supports hard drives based on the Serial ATA (SATA) 3Gb/s storage
specications, delivering enhanced scalability and doubling the bus bandwidth for high-speed
data retrieval and save.
1.3.2 ASUS unique features
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 CrashFree BIOS 3
The ASUS CrashFree BIOS 3 allows users to restore corrupted BIOS data from a
bootable oppy disk, USB ash disk, or the motherboard Support DVD containing the
original BIOS le. See page 2-6 for details.
ASUS EZ Flash 2
EZ Flash 2 is a user-friendly BIOS update utility. Simply launch this tool and update
BIOS from a USB ash disk before entering the OS. You can update your BIOS only in
a few clicks without preparing a bootable oppy disk or using an OS-based utility. See
pages 2-3 and 2-23 for details.
1.3.3 ASUS Stylish features
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. See page 2-21 for details.

ASUS P5QL SE 1-3
1.3.4 ASUS Intelligent Overclocking features
CPU Parameter Recall (C.P.R.)
The C.P.R. feature of the motherboard BIOS allows automatic re-setting to the BIOS default
settings in case the system hangs due to overclocking failure. When the system hangs due
to overclocking failure, C.P.R. eliminates the need to open the system chassis and clear the
RTC data. Simply shut down and reboot the system, and the BIOS automatically restores the
CPU default settings for each parameter.
1.4 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.
• Use a grounded wrist strap or touch a safely grounded object or a metal object, such
as the power supply case, before handling components 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, and/or components.
Onboard LED
The motherboard comes with a standby power LED that lights up to indicate that the
system is ON, in sleep mode, or in soft-off mode. This is a reminder that you 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.
P5QL SE
Right
P5QL SE CPU socket 775

1-4 Chapter 1: Product introduction
1.5 Motherboard overview
Before you install the motherboard, study the conguration of your chassis to ensure that the
motherboard ts into it.
Ensure that you unplug the power cord before installing or removing the motherboard.
Failure to do so can cause you physical injury and damage motherboard components.
1.5.1 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.
1.5.2 Screw holes
Place six screws into the holes indicated by circles to secure the motherboard to the chassis.
Do not overtighten the screws! Doing so can damage the motherboard.
P5QL SE
Place this side towards
the rear of the chassis

ASUS P5QL SE 1-5
1.5.3 Motherboard layout
P5QL SE
PCIEX16
PCIEX1_1
PCIEX1_2
PCI1
PCI2
PCI3
FLOPPY USB1112 USB910 USB78
AAFP
SPDIF_OUT
CD
ATX12V
EATXPWR
CPU_FAN
Intel®
P43
Lithium Cell
CMOS Power
Super
I/O
AUDIO
RTL
8111C
KB_USB56
8Mb
BIOS
JMB
368
SB_PWR
CLRTC
30.5cm(12.0in)
LGA775
Intel®
ICH10
DDR2 DIMM_A1 (64bit, 240-pin module) DDR2 DIMM_B1 (64bit, 240-pin module)
LPT
COM1
LAN_USB12
USB34
SATA4 SATA2
SATA3 SATA1
19.3cm(7.6in)
ICS
9P946AFLF
PRI_IDE
F_PANEL
SPEAKER
ALC
662
Refer to 1.10 Connectors for more information about rear panel ports and internal
connectors.

1-6 Chapter 1: Product introduction
1.5.4 Layout contents
Connectors/Jumpers/Slots Page
1. ATX power connectors (24-pin EATXPWR, 4-pin EATX12V) 1-24
2. LGA775 CPU Socket 1-6
3. CPU fan connector (4-pin CPU_FAN) 1-22
4. DDR2 DIMM slots 1-10
5. Floppy disk drive connector (34-1 pin FLOPPY) 1-20
6. Serial ATA connectors (7-pin SATA1-4) 1-22
7. IDE connector (40-1 pin PRI_EIDE) 1-21
8. USB connectors (10-1 pin USB78, USB910, USB1112) 1-23
9. Front panel audio connector (10-1 pin AAFP) 1-23
10. Optical drive audio connector (4-pin CD) 1-21
11. Digital audio connector (4-1 pin SPDIF_OUT) 1-20
12. System panel connector (10-1 pin PANEL) 1-25
13. Clear RTC RAM (3-pin CLRTC) 1-17
14. Speaker connector (4-pin SPEAKER) 1-24
1.6 Central Processing Unit (CPU)
This motherboard comes with a surface mount LGA775 socket designed for the
Intel®Core™2 Extreme / Core™2 Quad / Core™2 Duo / Pentium®Dual-Core /
Celeron®Dual-Core / Celeron®processors.
Ensure that all power cables are unplugged before installing the CPU.
• Upon purchase of the motherboard, make sure 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
LGA775 socket.
• The product warranty does not cover damage to the socket contacts resulting from
incorrect CPU installation/removal, or misplacement/loss/incorrect removal of the PnP
cap.

ASUS P5QL SE 1-7
1.6.1 Installing the CPU
To install a CPU:
1. Locate the CPU socket on the motherboard.
P5QL SE
Right
P5QL SE CPU socket 775
Before installing the CPU, ensure that the socket box is facing towards you and the load
lever is on your left.
To prevent damage to the socket
pins, do not remove the PnP cap
unless you are installing a CPU.
2. Press the load lever with your thumb
(A), then move it to the left (B) until it is
released from the retention tab.
A
B
Load lever
Retention tab
4. Lift the load plate with your thumb and
forenger to a 100º angle (4A), then
push the PnP cap from the load plate
window to remove (4B).
3. Lift the load lever in the direction of the
arrow to a 135º angle.
Load plate
PnP cap
4A
4B
3

1-8 Chapter 1: Product introduction
5. Position the CPU over the socket,
ensuring that the gold triangle is on the
bottom-left corner of the socket then t
the socket alignment key into the CPU
notch.
Gold
triangle
mark
Alignment key
CPU notch
6. Apply several drops of Thermal Interface
Material 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.
DO NOT eat the Thermal Interface Material. If it gets into your eyes or touches your skin,
ensure that you wash it off immediately, and seek professional medical help.
Some heatsinks come with pre-
applied thermal paste. If so, skip this
step.
To prevent contaminating the paste, DO NOT spread the paste with your nger directly.
7. Close the load plate (A), then push
the load lever (B) until it snaps into the
retention tab.
A
B
This motherboard supports Intel®
LGA775 processors with the
Intel®Enhanced Intel SpeedStep®
Technology (EIST) and
Hyper-Threading Technology.

ASUS P5QL SE 1-9
1.6.2 Installing the CPU heatsink and fan
The Intel®LGA775 processors require a specially designed heatsink and fan assembly to
ensure optimum thermal condition and performance.
• 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®-certied
multi-directional heatsink and fan.
•Ensure that you have installed the motherboard to the chassis before you install the
CPU fan and heatsink assembly.
• If you purchased a separate CPU heatsink and fan assembly, make sure that you have
properly applied Thermal Interface Material to the CPU heatsink or CPU before you
install the heatsink and fan assembly.
Your Intel®LGA775 heatsink and fan assembly comes in a push-pin design and requires no
tool to install.
Orient the heatsink and fan assembly such that the CPU fan cable is closest to the CPU fan
connector.
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.
2. Push down two fasteners at a time in a
diagonal sequence to secure the heatsink and
fan assembly in place.
A
A
B
B
1
1
AB
BA
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.
CPU_FAN
CPU FAN PWM
CPU FAN IN
CPU FAN PWR
GND
P5QL SE
P5QL SE CPU fan connector

1-10 Chapter 1: Product introduction
1.6.3 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.
A
A
B
B
A
AB
B
4. Carefully remove the heatsink and fan assembly from the motherboard.
1.7 System memory
1.7.1 Overview
The motherboard comes with two Double Data Rate 2 (DDR2) Dual Inline Memory Modules
(DIMM) sockets.
The gure illustrates the location of the DDR2 DIMM sockets:
P5QL SE
P5QL SE 240-pin DDR2 DIMM sockets
DIMM_A1 DIMM_B1
Channel Sockets
Channel A DIMM_A1
Channel B DIMM_B1