CPU
Intel Socket 775 Core2 Quad/Core2 Extreme/Core2 Duo/Pentium Extreme/Pentium D/Pentium 4 Compatible with Intel 05B/05A/06 processors
Support Intel 45nm CPU

Chipset
Intel X48 Intel ICH9R
Intel Fast Memory Access Technology
Front Side Bus    1600/1333/1066/800 MHz
Memory    4 x DIMM, Max. 8 GB, DDR3 2000(O.C.)/1800(O.C.)/1600/1333/1066/800 ECC,Non-ECC,Un-buffered Memory
Dual Channel memory architecture
Supports Intel Extreme Memory Profile (XMP)
* Overclocking speed
** For the X.M.P. support, CPUs with FSB 1333 or above are recommended.
*** Refer to www.asus.com or this user manual for the Memory QVL (Qualified Vendors List).
****When installing total memory of 4GB capacity or more, Windows 32-bit operation system may only recognize less than 3GB. Hence, a total installed memory of less than 3GB is recommended.

Expansion Slots
3 x PCIe x16 (blue @PCIe2.0 x16 mode, black @PCIe x4 or x1 mode) supports CrossFire Technology
1 x PCIe x1
2 x PCI

Storage    Southbridge
6 xSATA 3 Gb/s ports Intel Matrix Storage Technology Support RAID 0,1,5,10
JMicron JMB363 PATA and SATA controller
1 xUltraDMA 133/100/66 for up to 2 PATA devices
2 xExternal SATA 3.0 Gb/s port (SATA On-the-Go)
Support RAID 0,1,JBOD

LAN
Dual Gigabit LAN controllersMarvell 88E8056 PCIe Gigabit LAN controller featuring AI NET2
Realtek RTL8110SC PCI Gigabit LAN controller featuring AI NET2

Wireless LAN
ASUS WiFi-AP @n
- 300Mbps* IEEE 802.11n (Draft) and backwards compatible with IEEE 802.11g / b
- Software Access Point mode
*300Mbps is IEEE 802.11n draft specification. Actual throughput will vary depending on the wireless environment and other parameters

Audio
ADI AD1988B 8 -Channel High Definition Audio CODEC
Coaxial / Optical S/PDIF out ports at back I/O
Support Jack-Sensing, Enumeration, Multi-streaming
AI Audio 2

IEEE 1394
Agere L-FW3227 1394a controller supports 2 x 1394a ports (one at midboard; one at back panel)

USB
10 USB 2.0 ports (4 ports at mid-board, 6ports at back panel)

ASUS Unique Features
ASUS Power Saving Solution
- ASUS EPU (Energy Processing Unit)
- ASUS 3rd Generation 8-phase Power
- ASUS AI Nap

ASUS AI Lifestyle
- ASUS Express Gate

- ASUS WiFi-AP @n
- ASUS AI Direct Link

ASUS Quiet Thermal Solution
- ASUS Fanless Design: Pure Copper Heat-pipe solution
- ASUS Fanless Design: Stack Cool 2
- ASUS Q-Fan 2
- ASUS Optional Fan for Water-cooling or Passive-Cooling only

ASUS Crystal Sound
- ASUS Noise Filter
- ASUS AI Audio 2

ASUS EZ DIY
- ASUS Q-Connector
- ASUS Q-Shield
- ASUS O.C. Profile
- ASUS CrashFree BIOS 3
- ASUS EZ Flash 2
- ASUS AI Slot Detector

Overclocking Features
Intelligent overclocking tools
- ASUS AI Booster Utility

Precision Tweaker 2
- vDIMM: 65 -step DRAM voltage control
- vCore: Adjustable CPU voltage at 0.00625V increment
- vChipset (N.B.): 49-step voltage control
- vFSB Termination: 16-step reference voltage control
- vCPU PLL: 65-step CPU PLL voltage control

SFS (Stepless Frequency Selection)
- FSB tuning from 200MHz up to 800MHz at 1MHz increment
- Memory tuning from 800MHz up to 3200MHz
- PCI Express frequency tuning from 100MHz up to 150MHz at 1MHz increment

Overclocking Protection
- ASUS C.P.R.(CPU Parameter Recall)

Special Features
Multi-language BIOS
ASUS MyLogo 3

Back Panel I/O Ports
1 x PS/2 Keyboard
2 x External SATA
1 x S/PDIF Out
1 x IEEE 1394a
2 x LAN(RJ45) port
6 x USB 2.0/1.1
8 -Channel Audio I/O
2 x WiFi-AP @n antenna jack

Internal I/O Connectors   
2 x USB connectors support additional 4 USB ports
1 x Floppy disk drive connector
1 x IDE connector
6 x SATA connectors
1 x IEEE 1394a connector
1 x CPU Fan connector
1 x Chassis Fan connector
1 x Power Fan connector
1 x COM connector
1 x S/PDIF Out connector
2 x 4-pin ATX 12V Power connector
24-pin Power connector

Front panel audio connector
Chassis Intrusion connector
CD/AUX audio in
System Panel
BIOS    16 Mb Flash ROM
DMI 2.0
AMI BIOS
PnP
WfM 2.0
SM BIOS 2.3
ACPI 2.0a
Multi-language BIOS
ASUS EZ Flash 2
ASUS CrashFree BIOS 3

Manageability
WfM 2.0,DMI 2.0,WOL by PME,WOR by PME, PXE
Accessories
UltraDMA 133/100/66 cable
FDD cable
6 x Serial ATA cables
1 x 2-port Serial ATA power cable
ASUS Q-Shield
User's manual
ASUS WiFi-AP @n manual
3 in 1 Q-connector
1 x 2-port USB2.0 / 1-port IEEE1394 module
2 x Optional Fan for Water-Cooling or Passive-Cooling only
ASUS WiFi-AP @n omni-directional antenna
Support Disc    Drivers
ASUS PC Probe II
ASUS AI Suite
Anti-virus software (OEM version)
ASUS Update
ASUS WiFi-AP @n Wizard
Image-Editing Suite
Form Factor
ATX Form Factor
12 inch x 9.6 inch ( 30.5 cm x24.4 cm )

It is highly recommended to always use the most recent driver version available.
Do not forget to check with our site as often as possible in order to stay updated on the latest drivers, software and games.
Try to set a system restore point before installing a device driver. This will help if you installed a wrong driver. Problems can arise when your hardware device is too old or not supported any longer.