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.
vii
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.
viii
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.
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.
ix
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>
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 /iP5QDT.ROM
x
P5QD Turbo specications summary
CPULGA775 socket for Intel® Core™2 Extreme /
ChipsetIntel® P45 / ICH10R with Intel® Fast Memory Access (FMA)
non-ECC, un-buffered memory
Dual channel memory architecture
* Refer to www.asus.com or user manual for the Memory QVL
(Qualied Vendors Lists).
** When you install a total memory of 4 GB capacity or more,
Windows® 32-bit operating system may only recognize less
than 3 GB. We recommend using a maximum of 3 GB system
memory if you are using a Windows® 32-bit OS.
3 x PCI Express x1 slots
2 x PCI slots
- 5 x SATA 3.0 Gb/s ports
®
- Intel
support
JMicron® JMB361 SATA and PATA controller:
- 1 x UltraDMA 133 / 100 / 66 for up to 2 PATA devices
- 1 x External SATA 3.0 Gb/s port (SATA On-the-Go)
- Supports EZ Backup and Super Speed functions
* Drive Xpert function is available only when the hard disk dirves
- Supports Jack-Detection and Multi-Streaming
- Optical S/PDIF Out port at back I/O
- ASUS Noise Filter
(one at midboard; one at back panel)
Matrix Storage Technology with RAID 0, 1, 5, and 10
are set as data drives.
(continued on the next page)
xi
P5QD Turbo specications summary
ASUS special featuresASUS Exclusive Features:
Other features100% High-quality conductive polymer capacitors
ASUS exclusive
overclocking features
Back panel I/O ports1 x PS/2 keyboard port (purple)
- ASUS 8-Phase Power Design
- ASUS Express Gate
ASUS Power Saving Solutions:
- ASUS EPU
ASUS Quiet Thermal Solutions:
- ASUS Fanless Design: Stylish heatsink solution
- ASUS Fan Xpert
ASUS EZ DIY
- ASUS Drive Xpert
- ASUS CrashFree BIOS 3
- ASUS Q-Shield
- ASUS Q-Connector
- ASUS O.C. Prole
- ASUS EZ Flash 2
2oz Copper PCB
ASUS MyLogo 2™
Intelligent overclocking tools:
- AI Overclocking (intelligent CPU frequency tuner)
- TurboV
- Turbo Key
Precision Tweaker 2:
- vCore: Adjustable CPU voltage at 0.00625V increment
- vDIMM: 64-step DRAM voltage control
- vChipset: 55-step chipset voltage control
- vCPU PLL: 64-step CPU PLL voltage control
- vFSB Termination: 35-step reference voltage control
SFS (Stepless Frequency Selection):
- FSB tuning from 200 MHz up to 800 MHz at 1 MHz increment
- PCI Express frequency tuning from 100 MHz to 180 MHz
at 1 MHz increment
Overclocking protection:
- ASUS C.P.R. (CPU Parameter Recall)
1 x PS/2 mouse port (green)
1 x Optical S/PDIF Out port
1 x IEEE 1394a port
1 x External SATA port
1 x LAN (RJ-45) port
6 x USB 2.0/1.1 ports
8-channel Audio I/O ports
(continued on the next page)
xii
P5QD Turbo specications summary
Internal I/O connectors3 x USB connectors support additional 6 USB ports
BIOS features8 Mb AMI BIOS, PnP, DMI 2.0, WfM 2.0, SM BIOS 2.5, ACPI 3.0,
ManageabilityWOL by PME, WOR by PME, WOR by Ring, PXE
Support DVD contentsDrivers
Form factorATX form factor: 12 in. x 9.2 in. (30.5 cm x 23.4 cm)
*Specications are subject to change without notice.
1 x IDE connector
1 x COM connector
5 x SATA connectors (red)
2 x Drive Xpert SATA connectors (orange and white)
1 x CPU Fan connector
2 x Chassis Fan connectors
1 x Power Fan connector
1 x IEEE1394a connector
Front panel audio connector
1 x S/PDIF Out header
Chassis Intrusion connector
CD audio in
24-pin ATX Power connector
8-pin ATX 12V Power connector
System Panel (Q-Connector)
ASUS EZ Flash 2, ASUS CrashFree BIOS 3
Express Gate
ASUS PC Probe II
ASUS Update
ASUS AI Suite
Anti-virus software (OEM version)
xiii
xiv
Chapter 1
User Manual
Chapter 1: Product introduction
1.1 Welcome!
Thank you for buying an ASUS® P5QD Turbo 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 P5QD Turbo
motherboard
4 x Serial ATA signal cables
• 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 Q-Connector kit
1 x ASUS Q-Shield
ASUS P5QD Turbo1-1
1.3 Special features
1.3.1 Product highlights
Chapter 1
LGA775 Intel® Core™2 Processor Ready
This motherboard supports the latest Intel® Core™2 processors in the LGA775 package. It
also supports Intel® 45nm multi-core CPUs. With the new Intel® Core™ microarchitecture and
1600 / 1333 / 1066 / 800 MHz FSB, Intel® Core™2 processor is one of the most powerful and
energy efcient CPU in the world.
1333/1066/800 MHz FSB (Front Side Bus), PCIe 2.0, and multi-core CPUs. It especially
includes Intel® Fast Memory Access technology that signicantly optimizes the use of available
memory bandwidth and reduces the latency of the memory accesses.
Dual-Channel DDR2 1300 support
The motherboard supports DDR2 memory that features data transfer rates of 1300 /1200
/ 1066 / 800 / 667 MHz to meet the higher bandwidth requirements of the latest operation
system, 3D graphics, multimedia, and Internet applications. The dual-channel DDR2
architecture doubles the bandwidth of your system memory to boost system performance,
eliminating bottlenecks with peak bandwidths of up to 20.8 GB/s.
100% high-quality conductive polymer capacitors
This motherboard uses all high-quality conductive polymer capacitors for durability, improved
lifespan, and enhanced thermal capacity.
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.
1.3.2 ASUS special features
ASUS 8-Phase Power Design
With power efciency so important to operating temperatures, ASUS 8-Phase VRM design
leads the industry with its 96% power efciency. High quality power components such as low
RDS (on) MOSFETs for minimum switching loss & lower temperatures, Ferrite core chokes
with lower hysteresis loss, and high quality Japanese-made conductive polymer capacitors
all add up to ensure longer component life and lower power loss—creating more energy
efciency.
1-2Chapter 1: Product Introduction
Express Gate
Taking only 5 seconds to bootup, Express Gate is the one-stop gateway to instant fun! It’s a
unique motherboard built-in OS. You can utilize the most popular Instant Messengers (IM)
like MSN, Skype, Google talk, QQ, and Yahoo! Messenger to keep in touch with friends,
or quickly check on the weather and e-mails just before leaving your house. What’s more,
the user-friendly picture manager lets you view your pictures without entering Windows at
anytime!
The actual boot time is subject to hardware congurations and product models.
ASUS Power Saving Solution
ASUS Power Saving solution intelligently and automatically provides balanced computing
power and energy consumption.
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!
ASUS Quiet Thermal Solutions
ASUS Quiet Thermal solutions make the system more stable and enhance the overclocking
capability.
Fanless Design—Unique stylish heatsink
The brand new 2-color heatsink features 0-dB thermal solution that offers users a
noiseless PC environment. The Paten Pending 2-color design within the beautifully
curved ns upgrades the visual enjoyment for the motherboard users, and also
effectively cools down hot airows generated by the north bridge chipset. Combined
with usability and aesthetics, the ASUS Patent 2-color Wing heatsink will give users an
extremely silent and cooling experience with the elegant appearance!
Chapter 1
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.
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 Drive Xpert
Without drivers or 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.
ASUS P5QD Turbo1-3
ASUS CrashFree BIOS 3
ASUS CrashFree BIOS 3 allows you to restore corrupted BIOS data from a USB ash
disk containing the BIOS le. This protection eliminates the need to buy a replacement
Chapter 1
ROM chip.
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.
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.
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.
1.3.3 ASUS exclusive overclocking features
TurboV
Feel the adrenaline rush of real-time OC—now a reality with the ASUS TurboV. This easy OC
tool allows you to overclock without exiting or rebooting the OS; and its user-friendly interface
makes overclock with just a few clicks away. Moreover, the ASUS OC proles in TurboV
provides the best O.C. settings in different scenarios.
Turbo Key
ASUS Turbo Key allows you to turn the PC power button into a physical overclocking button.
After the easy setup, Turbo Key can boost performances without interrupting ongoing work or
games, simply through pressing the button
Precision Tweaker 2
Allows you to adjust the CPU voltage in 0.00625v steps and NB/DRAM voltage in 0.02v
steps to ne-tune voltage to achieve the most precise setting for the ultimate overclocking
conguration.
C.P.R. (CPU Parameter Recall)
The BIOS C.P.R. feature automatically restores the CPU default settings 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 parameters to their default settings.
1-4Chapter 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.
Onboard LED
The motherboard comes with a standby power LED. The green LED lights up to indicate
that the system is ON, in sleep mode, or in soft-off mode. This is a reminder that you should
shut down the system and unplug the power cable before removing or plugging in any
motherboard component. The illustration below shows the location of the onboard LED.
Chapter 2
ASUS P5QD Turbo2-1
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. Keyboard/mouse power (3-pin PS2_USBPW56)
2. USB device wake-up (3-pin USBPW1-4, USBPW7-10, USBPW1112)
3. ATX power connectors (24-pin EATXPWR, 8-pin EATX12V)
4. LGA775 CPU socket
5. DDR2 DIMM slots
6. CPU, chassis, and power fan connectors
(4-pin CPU_FAN, 3-pin CHA_FAN1–2, 3-pin PWR_FAN)
7. CPU overvoltage setting (3-pin OV_CPU)
8. IDE connector (40-1 pin PRI_EIDE)
9. ICH10R Serial ATA connectors (7-pin SATA1–5 [Red])
10. Standby power LED (SB_PWR)
11. Silicon Image
(7-pin SATA_E1 [orange, port 0], 7-pin SATA_E2 [white, port 1])
12. Clear RTC RAM (3-pin CLRTC)
13. System panel connector (20-8 pin PANEL)
14. Chassis intrusion connector (4-1 pin CHASSIS)
15. USB connectors (10-1 pin USB78, USB910, USB1112)
16. IEEE 1394a port connector (10-1 pin IE1394_2)
17. Serial port connector (10-1 pin COM1)
18. Optical drive audio connector (4-pin CD)
19. Front panel audio connector (10-1 pin AAFP)
20. Digital audio connector (4-1 pin SPDIF_OUT)
®
Sil5723 Serial ATA RAID connectors
2-24
2-24
2-35
2-5
2-10
2-33
2-22
2-25
2-29
2-1
2-30
2-21
2-37
2-34
2-31
2-32
2-32
2-31
2-36
2-34
Chapter 2
ASUS P5QD Turbo2-3
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 six 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)
The 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.
• If installing a dual-core CPU, connect the chassis fan cable to the CHA_FAN1
connector to ensure system stability.
• Due to the chipset limitation, we recommend that you use FSB 800MHz CPU or
above.
• 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
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.
2.3.1 Installing the CPU
To install a CPU:
Chapter 2
1. Locate the CPU socket on the motherboard.
Before installing the CPU, ensure that the cam box is facing towards you and the load lever
is on your left.
ASUS P5QD Turbo2-5
2. Press the load lever with your thumb
(A), then move it to the left (B) until it is
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
A
B
Load lever
3. Lift the load lever in the direction of the
arrow to a 135º angle.
Chapter 2
4. Lift the load plate with your thumb and
forenger to a 100º angle (4A), then
push the PnP cap from the load plate
window to remove (4B).
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 key into the CPU
notch.
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!
4B
3
CPU notch
PnP cap
Load plate
4A
Gold triangle
mark
Alignment key
2-6Chapter 2: Hardware information
6. Apply some 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.
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.
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.
Chapter 2
A
B
ASUS P5QD Turbo2-7
2.3.2 Installing the CPU heatsink and fan
The Intel® LGA775 processor requires 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®-certied
multi-directional heatsink and fan.
®
• Your Intel
Ensure that you have installed the motherboard to the chassis before you install the CPU
fan and heatsink assembly.
LGA775 heatsink and fan assembly comes in a push-pin design and
requires no tool to install.
Chapter 2
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.
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.
A
B
B
A
A
B
B
1
A
1
Orient the heatsink and fan assembly such that the CPU fan cable is closest to the CPU fan
connector.
2-8Chapter 2: Hardware information
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 P5QD Turbo2-9
2.4 System memory
2.4.1 Overview
The motherboard comes with four Double Data Rate 2 (DDR2) Dual Inline Memory Modules
(DIMM) sockets.
A DDR2 module has the same physical dimensions as a DDR DIMM but has a 240-pin
footprint compared to the 184-pin DDR DIMM. DDR2 DIMMs are notched differently to
prevent installation on a DDR DIMM socket.
The gure illustrates the location of the DDR2 DIMM sockets:
Chapter 2
Recommended memory congurations
One DIMM:
You may install one memory module in any slot as a single-channel operation.
Two DIMMs (dual-channel operation):
Four DIMMs (dual-channel operation):
2-10Chapter 2: Hardware information
2.4.2 Memory congurations
You may install 512MB, 1GB, 2GB and 4GB unbuffered ECC and non-ECC DDR2 DIMMs
into the DIMM sockets.
• You may install varying memory sizes in Channel A and Channel B. The system maps
the total size of the lower-sized channel for the dual-channel conguration. Any excess
memory from the higher-sized channel is then mapped for single-channel operation.
• We recommend that you install the memory modules from the yellow slots for better
overclocking capability.
• Always install DIMMs with the same CAS latency. For optimum compatibility, it is
recommended that you obtain memory modules from the same vendor.
• Due to the memory address limitation on 32-bit Windows OS, when you install 4GB
or more memory on the motherboard, the actual usable memory for the OS can be
about 3GB or less. For effective use of memory, we recommend that you do any of the
following:
- Use a maximum of 3GB system memory if you are using a 32-bit Windows OS.
- Install a 64-bit Windows OS when you want to install 4GB or more on the
motherboard.
• This motherboard does not support DIMMs made up of 256 megabit (Mb) chips or
less.
• The default memory operation frequency is dependent on its Serial Presence Detect
(SPD), which is the standard way of accessing information from a memory module.
Under the default state, some memory modules for overclocking may operate at a
lower frequency than the vendor-marked value. To operate at the vendor-marked or at
a higher frequency, see section 3.5 Ai Tweaker menu for manual memory frequency
adjustment.
• For system stability, use a more efcient memory cooling system to support a full