Asus P6T WS PRO User manual

Motherboard
P6T WS
Professional

ii
E4175
First Edition
October 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
Contents ...................................................................................................... iii
Notices....................................................................................................... viii
Safety information ...................................................................................... ix
About this guide .......................................................................................... x
P6T WS Professional specications summary....................................... xii
Chapter 1: Product introduction
1.1 Welcome! ...................................................................................... 1-1
1.2 Package contents......................................................................... 1-1
1.3 Special features............................................................................ 1-2
1.3.1 Product highlights ........................................................... 1-2
1.3.2 ASUS Unique features ................................................... 1-3
Chapter 2: Hardware information
2.1 Before you proceed ..................................................................... 2-1
2.2 Motherboard overview................................................................. 2-2
2.2.1 Motherboard layout ......................................................... 2-2
2.2.2 Layout contents............................................................... 2-3
2.2.3 Placement direction ........................................................ 2-4
2.2.4 Screw holes .................................................................... 2-4
2.3 Central Processing Unit (CPU) ................................................... 2-5
2.3.1 Installing the CPU ........................................................... 2-6
2.3.2 Installing the CPU heatsink and fan................................ 2-9
2.3.3 Uninstalling the CPU heatsink and fan ......................... 2-10
2.4 System memory ......................................................................... 2-11
2.4.1 Overview ........................................................................2-11
2.4.2 Memory congurations.................................................. 2-12
2.4.3 Installing a DIMM .......................................................... 2-13
2.4.4 Removing a DIMM ........................................................ 2-13
2.5 Expansion slots.......................................................................... 2-17
2.5.1 Installing an expansion card ......................................... 2-17
2.5.2 Conguring an expansion card ..................................... 2-17
2.5.3 Interrupt assignments ................................................... 2-18
2.5.4 PCI slot ......................................................................... 2-19
2.5.5 PCI-X slots .................................................................... 2-19
2.5.6 PCI Express x1 slot....................................................... 2-19

iv
Contents
2.5.7 PCI Express 2.0 x16 slots............................................. 2-19
2.6 Jumpers ...................................................................................... 2-21
2.7 Connectors ................................................................................. 2-24
2.7.1 Rear panel connectors.................................................. 2-24
2.7.2 Internal connectors ....................................................... 2-26
2.8 G.P. Diagnosis card installation................................................ 2-37
2.8.1 G.P. Diagnosis card layout............................................ 2-37
2.8.2 Installing G.P. Diagnosis card ....................................... 2-37
2.8.3 G.P. Diagnosis card check codes.................................. 2-38
2.9 Starting up for the rst time...................................................... 2-39
2.10 Turning off the computer........................................................... 2-40
2.10.1 Using the OS shut down function.................................. 2-40
2.10.2 Using the dual function power switch............................ 2-40
Chapter 3: BIOS setup
3.1 Managing and updating your BIOS ............................................ 3-1
3.1.1 ASUS Update utility ........................................................ 3-1
3.1.2 ASUS EZ Flash 2 utility................................................... 3-4
3.1.3 Creating a bootable oppy disk....................................... 3-5
3.1.4 AFUDOS utility................................................................ 3-6
3.1.5 ASUS CrashFree BIOS 3 utility ...................................... 3-8
3.2 BIOS setup program .................................................................... 3-9
3.2.1 BIOS menu screen........................................................ 3-10
3.2.2 Menu bar....................................................................... 3-10
3.2.3 Navigation keys............................................................. 3-10
3.2.4 Menu items ....................................................................3-11
3.2.5 Sub-menu items.............................................................3-11
3.2.6 Conguration elds ........................................................3-11
3.2.7 Pop-up window ..............................................................3-11
3.2.8 Scroll bar........................................................................3-11
3.2.9 General help ..................................................................3-11
3.3 Main menu .................................................................................. 3-12
3.3.1 System Time ................................................................. 3-12
3.3.2 System Date ................................................................. 3-12
3.3.3 Language ...................................................................... 3-12
3.3.4 SATA 1-6 ....................................................................... 3-13

v
Contents
3.3.5 Storage Conguration ................................................... 3-14
3.3.6 AHCI Conguration ....................................................... 3-15
3.3.7 System Information ....................................................... 3-16
3.4 Ai Tweaker menu........................................................................ 3-17
3.4.1 Ai Overclock Tuner ....................................................... 3-17
3.4.2 CPU Ratio Setting ........................................................ 3-18
3.4.3 Intel(R) SpeedStep(TM) Tech ...................................... 3-18
3.4.4 Intel(R) Turbo Mode Tech ............................................. 3-18
3.4.5 DRAM Frequency ........................................................ 3-19
3.4.6. DRAM Timing Control .................................................. 3-19
3.4.7 CPU Voltage ............................................................... 3-21
3.4.8 CPU PLL Voltage ......................................................... 3-21
3.4.9 QPI/DRAM Core Voltage ............................................. 3-21
3.4.10 IOH Voltage .................................................................. 3-22
3.4.11 IOH PCIE Voltage ........................................................ 3-22
3.4.12 ICH Voltage .................................................................. 3-22
3.4.13 ICH PCIE Voltage ........................................................ 3-22
3.4.14 DRAM Bus Voltage ...................................................... 3-22
3.4.15 DRAM DATA REF Voltage on CHA/B/C ....................... 3-23
3.4.16 DRAM CTRL REF Voltage on CHA/B/C ...................... 3-23
3.4.17 Load-Line Calibration ................................................... 3-23
3.4.18 CPU Differential Amplitude ........................................... 3-23
3.4.19 CPU Clock Skew .......................................................... 3-23
3.4.20 CPU Spread Spectrum ................................................ 3-24
3.4.21 IOH Clock Skew ........................................................... 3-24
3.4.22 PCIE Spread Spectrum ................................................ 3-24
3.5 Advanced menu ......................................................................... 3-25
3.5.1 CPU Conguration ........................................................ 3-25
3.5.2 Chipset.......................................................................... 3-28
3.5.3 Onboard Device Conguration...................................... 3-29
3.5.4 USB Conguration ........................................................ 3-30
3.5.5 PCIPnP ......................................................................... 3-31
3.6 Power menu................................................................................ 3-32
3.6.1 Suspend Mode ............................................................. 3-32
3.6.2 Repost Video on S3 Resume........................................ 3-32

vi
Contents
3.6.3 ACPI 2.0 Support .......................................................... 3-32
3.6.4 ACPI APIC Support ...................................................... 3-32
3.6.5 APM Conguration........................................................ 3-33
3.6.6 Hardware Monitor ......................................................... 3-34
3.7 Boot menu .................................................................................. 3-36
3.7.1 Boot Device Priority ...................................................... 3-36
3.7.2 Boot Settings Conguration .......................................... 3-37
3.7.3 Security ......................................................................... 3-38
3.8 Tools menu ................................................................................. 3-40
3.8.1 ASUS EZ Flash 2.......................................................... 3-40
3.8.2 Express Gate ............................................................... 3-41
3.8.3 ASUS O.C. Prole......................................................... 3-42
3.8.4 Ai Net 2 ......................................................................... 3-43
3.9 Exit menu.................................................................................... 3-44
Chapter 4: Software support
4.1 Installing an operating system ................................................... 4-1
4.2 Support DVD information ............................................................ 4-1
4.2.1 Running the support DVD ............................................... 4-1
4.2.2 Drivers menu................................................................... 4-2
4.2.3 Utilities menu .................................................................. 4-4
4.2.4 Make disk menu.............................................................. 4-6
4.2.5 Manual menu .................................................................. 4-7
4.2.6 ASUS Contact information .............................................. 4-7
4.2.7 Other information ............................................................ 4-8
4.3 Software information ................................................................. 4-10
4.3.1 ASUS MyLogo 2™........................................................ 4-10
4.3.2 ASUS PC Probe II......................................................... 4-12
4.3.3 ASUS AI Suite............................................................... 4-18
4.3.4 ASUS AI Nap ................................................................ 4-20
4.3.5 ASUS Fan Xpert ........................................................... 4-21
4.3.6 ASUS EPU–6 Engine.................................................... 4-23
4.3.7 ASUS TurboV................................................................ 4-27
4.3.8 SoundMAX® High Denition Audio utility....................... 4-29
4.3.9 ASUS Express Gate ..................................................... 4-35
4.3.10 Realtek Teaming Utility.................................................. 4-44

vii
Contents
4.4 RAID congurations .................................................................. 4-48
4.4.1 RAID denitions ............................................................ 4-48
4.4.2 Installing Serial ATA hard disks ..................................... 4-49
4.4.3 Intel® RAID congurations............................................. 4-49
4.4.4 Marvell® SAS RAID congurations................................ 4-57
4.5 Creating a RAID driver disk....................................................... 4-66
4.5.1 Creating a RAID driver disk without entering the OS.... 4-66
4.5.2 Creating a RAID driver disk in Windows®...................... 4-66
Chapter 5: Multiple GPU technology support
5.1 ATI®CrossFireX™ technology .................................................... 5-1
5.1.1 Requirements.................................................................. 5-1
5.1.2 Before you begin............................................................. 5-1
5.2 Installing CrossFireX™ graphics cards..................................... 5-2
5.2.1 CrossFireX installation .................................................... 5-2
5.3 Software information ................................................................... 5-4
5.3.1 Installing the device drivers............................................. 5-4
5.3.2 Enabling the ATI®CrossFireX™ technology ................... 5-4
5.4 NVIDIA®SLI™ Technology .......................................................... 5-6
5.4.1 Requirements.................................................................. 5-6
5.4.2 Installing SLI™ graphics cards ....................................... 5-6
5.4.3 Installing the device drivers............................................. 5-7
5.4.4 Enabling the NVIDIA®SLI™ technology in Windows®.... 5-7

viii
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.
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.
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.

ix
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 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.
This symbol of the crossed out wheeled bin indicates that the product (electrical,
electronic equipment and mercury-containing button cell battery) should not
be placed in municipal waste. Check local regulations for disposal of electronic
products.

x
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: 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 congure 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.

xi
Conventions used in this guide
To make sure that you perform certain tasks properly, take note of the following
symbols used throughout this manual.
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 /iP6TWS.ROM
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.

xii
P6T WS Professional specications summary
(continued on the next page)
CPU LGA1366 socket for Intel®Core™ i7 Processor Extreme
Edition / Core™ i7 Processor
Supports Intel®Dynamic Speed Technology
* Refer to www.asus.com for Intel CPU support list
Chipset Intel®X58 / ICH10R
System Bus Up to 6.4GT/s; Intel®QuickPath Interconnect
Memory 6 x DIMM, max. 12GB, DDR3 1600(O.C.) / 1333 /
1066 MHz, non-ECC, un-buffered memory
Triple channel memory architecture
Supports Intel® Extreme Memory Prole (XMP)
* Due to Intel spec denition, DIMMs of DDR3-1333 or
above are supported by specic CPU models only.
** Refer to www.asus.com or this user manual for the
Memory QVL (Qualied Vendors Lists)
Expansion Slots 2 x PCI Express 2.0 x16 slots (at x16 / x16 mode)
1 x PCI Express x1 slot
2 x PCI-X slots
1 x PCI 2.2 slot
Multi-GPU Support Supports NVIDIA®SLI™ Technology*
Supports ATI®CrossFireX™ Technology
* SLI support may need BIOS update. Visit www.asus.
com for more details.
Storage Intel®ICH10R Southbridge:
- 6 x SATA 150/300 ports
- Intel®Matrix Storage supporting SATA RAID 0,1,
10, and 5
Marvell 88SE6320 controller:
- 2 x SAS ports supporting SAS RAID 0, 1 and 10*
Marvell 88SE6121 controller:
- 2 x eSATA 150/300 ports (SATA On-the-Go),
supporting SATA RAID 0, 1, 10 and 5**
* A SAS expander (excluded in package) is required
while using RAID 10 on SAS ports.
** A port-multiplier (excluded in package) is required while
using RAID 5 or 10 on eSATA ports.
LAN 2 x Realtek®8111C PCIe Gigabit LAN controllers
supporting teaming function
USB 12 x USB 2.0 ports (6 ports at mid-board, 6 ports at back
panel)
IEEE 1394 LSI®Agere FW3227 controller supports 2 x IEEE 1394a
ports (one at midboard; one at back panel)

xiii
(continued on the next page)
P6T WS Professional specications summary
Audio ADI® AD2000B 8-channel High Denition Audio CODEC
- Supports Jack-Detection, Multi-streaming, and Front
Panel Jack-Retasking technology
- Coaxial / Optical S/PDIF out ports at back I/O
- ASUS Noise Filter
ASUS Special features ASUS Exclusive Features:
- ASUS EPU-6 Engine
- ASUS True 16+2 Phase Power Design
- ASUS AI Nap
ASUS Workstation Unique Features:
- G.P. Diagnosis card
- ASUS SASsaby cards support
- ASUS WS Diag. LED
- ASUS WS Heartbeat
- SAS onboard
ASUS AI Life Features:
- ASUS Express Gate
ASUS Quiet Thermal Solution:
- ASUS Fanless Design: Heat-pipe solution
- ASUS Fanless Design: Stack Cool 2
- ASUS Fan Xpert
ASUS EZ DIY:
- ASUS Q-Shield
- ASUS Q-Connector
- ASUS O.C. Prole
- ASUS CrashFree BIOS 3
- ASUS EZ Flash 2
ASUS Stylish Features ASUS MyLogo 2
Multi-language BIOS
ASUS Exclusive
Overclocking Features
ASUS TurboV utility
Precision Tweaker 2:
- vCore: Adjustable CPU voltage at 0.00625V
increment
- vCPU PLL: 36-step reference voltage control
- vDRAM Bus: 49-step DRAM bus voltage control
- vChipset(N.B.): 31-step chipset voltage control
- vNB-PCIe: 65-step chipset-PCIe bus voltage control
SFS (Stepless Frequency Selection):
- Internal Base Clock tuning from 100MHz up to 500
MHz at 1MHz increment
- PCI Express frequency tuning from 100MHz up to
180MHz at 1MHz increment
Overclocking Protection:
- ASUS C.P.R.(CPU Parameter Recall)

xiv
P6T WS Professional specications summary
*Specications are subject to change without notice.
Back Panel I/O Ports 1 x PS/2 Keyboard / Mouse combo port
1 x S/PDIF Out (Coaxial + Optical)
2 x External SATA ports
1 x IEEE1394a port
2 x RJ45 ports
6 x USB 2.0/1.1 ports
8-channel Audio I/O
Internal I/O Connectors 3 x USB connectors support additional 6 USB ports
6 x SATA connectors (Blue)
2 x SAS connectors (Black)
1 x CPU Fan connector with PWM control
2 x Chassis Fan connectors with Q-fan control
1 x Chassis Fan connector without Q-fan control
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)
1 x TPM connector
BIOS Features 16 Mb AMI BIOS, PnP, DMI 2.0, WfM 2.0, SM BIOS
2.4, Multi-language BIOS
Manageability WOL by PME, WOR by PME, Chassis Intrusion, PXE
Support DVD Contents Drivers
ASUS PC Probe II
ASUS Update
ASUS AI Suite
Image-Editing Suite
Anti-virus software (OEM version)
Form Factor ATX Form Factor, 12”x 9.6” (30.5cm x 24.5cm)

1
Chapter 1: Product
introduction
This chapter describes the motherboard
features and the new technologies it
supports.

ASUS P6T WS Professional
Chapter summary 1
1.1 Welcome! ...................................................................................... 1-1
1.2 Package contents......................................................................... 1-1
1.3 Special features............................................................................ 1-2

ASUS P6T WS Professional 1-1
1.1 Welcome!
Thank you for buying an ASUS®P6T WS Professional 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.
If any of the above items is damaged or missing, contact your retailer.
1.2 Package contents
Check your motherboard package for the following items.
Motherboard ASUS P6T WS Professional
I/O modules 1 x 2-port USB 2.0 / 1-port IEEE1394a module
Cables 2 x Serial ATA power cables
6 x Serial ATA signal cables
2 x SAS + Power cables
Accessories 1 x ASUS Q-Shield (I/O shield)
1 x ASUS Q-Connector Kit (USB, 1394, system
panel; Retail version only)
1 x G.P. Diagnosis Card (Retail version only)
1 x ASUS SLI bridge
Application DVD ASUS motherboard support DVD
Documentation User guide

1-2 Chapter 1: Product Introduction
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/packagings to safeguard
consumers’ health while minimizing the impact on the environment.
Intel®Core™ i7 Processor Extreme Edition /
Core™ i7 Processor support
This motherboard supports the latest Intel®Core™ i7 processors in LGA1366
package with integrated memory controller to support 3-channel (6 DIMMs) DDR3
memory. Supports Intel®QuickPath Interconnect (QPI) with a system bus of up
to 6.4GT/s and a max bandwidth of up to 25.6GB/s. Intel®Core™ i7 processor is
one of the most powerful and energy efcient CPUs in the world. See page 2-5 for
details.
Intel®X58 Chipset
The Intel®X58 Express Chipset is the latest chipset designed to support latest
Intel® Core™ i7 Processors and Intel’s next generation system interconnect
interface, Intel®QuickPath Interconnect (QPI), providing improved performance by
utilizing serial point-to-point links, allowing increased bandwidth and stability. It also
supports up to 36 PCI Express 2.0 lanes providing better graphics performance.
Triple-Channel DDR3 1600(O.C.)/1333/1066 support
The motherboard supports DDR3 memory that features data transfer rates of
1600 (O.C.) /1333 / 1066 MHz to meet the higher bandwidth requirements of the
latest 3D graphics, multimedia, and Internet applications. The triple-channel DDR3
architecture enlarges the bandwidth of your system memory to boost system
performance. See page 2-11 for details.
SLI and CrossFireX on Demand
The P6T WS Professional breaks the boundaries to bring you the multi-GPU
choice of either SLI™ or CrossFireX™. Expect a brand-new gaming style you’ve
never experienced before! See chapter 5 for details.
SLI support may need BIOS update. Visit www.asus.com for more details.

ASUS P6T WS Professional 1-3
1.3.2 ASUS Unique features
ASUS TurboV
Feel the adrenaline rush of real-time OC—now a reality with the ASUS TurboV.
This extreme OC tool lets you set new ambitions on the OC stage with an
advanced and easy-to-use interface—allowing you to overclock without exiting
or rebooting the OS. With micro adjustments of the CPU PLL, NB, NB-PCIe, and
DRAM voltages in 0.02v intervals, there are no limits—only extreme results to
break new OC records! See page 4-27 for details.
ASUS True 16+2 Phase Power Design
The breakthrough technology of 16+2 phase VRM design is bringing to the
ASUS motherboards. 16+2 phase power design (16-phase to vCore; 2-phase to
vDRAM/QPI controller inside CPU) can reach high power efciency, dispel heat
generated by VRM module effectively, and lower more temperature compared to
other VRM solution. 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 16+2 phase VRM design also
ensure longer component life, minimum power loss, and help to reach the superior
overclocking score ever than before.
ASUS Workstation Features
ASUS Workstation features provide complete support to system maintenance and
storage technology.
SAS onboard
This motherboard provides onboard SAS ports for hard drive upgrade
exibility. Faster, safer and more stable, SAS will provide users with a better
choice for storage expansion and upgrade needs. See page 2-28 for details.
Diag LED
Diag LED checks key components (CPU, DRAM, VGA card, and HDD) in
sequence during motherboard booting process. If an error is found, the LED
next to the error device will continue lighting until the problem is solved. This
user-friendly design provides an intuitional way to locate the root problem
within a second.

1-4 Chapter 1: Product Introduction
ASUS Heartbeat
Brightly and vividly lighting LEDs shine around the ASUS brand name on
the motherboard after successful booting process. With the breathing-like
deep blue lighting shining in regular tempo, ASUS Heartbeat makes the
motherboard as vivid as life.
G.P. Diagnosis card
Bundled with P6T WS Professional motherboard (retail version), the G.P.
Diagnosis card assists users in system checking by effortlessly and quickly
providing precise system checks right after they switch on their PCs. See
page 2-37 for details.
ASUS SASsaby cards support
This motherboard is fully compatible with ASUS SASsaby cards (optional).
Faster, safer and more stable, SAS will provide users with a better choice for
storage expansion and upgrade needs.
ASUS Power Saving Solution
ASUS Power Saving solution intelligently and automatically provides balanced
computing power and energy consumption.
ASUS EPU-6 Engine
The new ASUS EPU—the world’s rst power saving engine, has been
upgraded to a new 6 engine version, which provides total system power
savings by detecting current PC loadings and intelligently moderating power
in real-time. With auto phase switching for components (which includes the
CPU, VGA card, memory, chipset, hard drives and CPU cooler / system
fans), the EPU automatically provides the most appropriate power usage via
intelligent acceleration and overclocking - helping save power and money.
See page 4-23 for details.
AI Nap
With AI Nap, the system can continue running at minimum power and noise
when you are temporarily away. To wake the system and return to the OS
environment, simply click the mouse or press a key. See page 4-20 for
details.