Technical specs from Asus.

CPU
AMD Socket AM2+ / AM2 Phenom™ X4/Phenom™ X3/Athlon™ /Athlon™ X2/Sempron™ AMD 140W CPU Support
AMD Cool 'n' Quiet™ Technology
Support AM3 Phenom™ II / Athlon™ X4 / Athlon™ X3 / Athlon™ X2 Processors
Support 45nm Phenom™ II CPU
Chipset
NVIDIA nForce 750a SLI
System Bus
Up to 5200 MT/s HyperTransport™ 3.0 interface for AM3/AM2+ CPU
2000 / 1600 MT/s for AM2 CPU
Memory
4 x DIMM, Max. 16 GB, DDR2 1300(O.C.)/1200(O.C.)/1066*/800/667 ECC,Non-ECC,Un-buffered Memory
Dual Channel memory architecture
*Due to AMD CPU limitation, DDR2 1066 is supported by AM3/AM2+ CPU for one DIMM per channel only. Refer to www.asus.com for the memory QVL (Qualified Vendors Lists).
**Due to OS limitation, 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
2 x PCIe 2.0 x16 (Single x16 or Dual x8)
2 x PCIe x1
2 x PCI 2.2
Multi-GPU Support
Support NVIDIA® SLI™ Technology at x8 link
Storage

NVIDIA nForce 750a SLI chipset
- 1 x Ultra DMA 133 / 100
- 6 x SATA 3Gb/s ports (Legacy IDE operation is only supported on drives 1–4.)
- NVIDIA® MediaShield™ RAID supports RAID 0, 1, 0+1, 5, and JBOD
LAN
Realtek 8211CL Gigabit/10 LAN controller featuring AI NET 2
Audio
VIA1708S 8 -Channel High Definition Audio CODEC
- Supports Jack-Detection, Multi-Streaming, and Front Panel Jack-Retasking
- Optical S/PDIF Out ports at back I/O
- ASUS Noise Filtering
IEEE 1394
VIA VT6315N controller supports 2 x 1394a ports
USB
12 xUSB 2.0 ports (6 ports at mid-board, 6 ports at back panel)
ASUS Unique Features

ASUS Power Saving Solutions:
- 8+1 Phase Power Design
- ASUS Anti-Surge Protection
ASUS Green Design:
- EPU
*ASUS EPU is supported by AM3/AM2+ CPU only
- ASUS AI Nap
Express Gate
ASUS Quiet Thermal Solution:
- ASUS Fanless Design:stylish heatsink solution
- ASUS Q-Fan2
ASUS EZ DIY:
- ASUS Q-Connector
- ASUS CrashFree BIOS 2
- ASUS O.C. Profile
- ASUS EZ Flash 2
Overclocking Features
Intelligent overclocking tools
- AI Overclocking (intelligent CPU frequency tuner)
-TurboV
-Turbo Key
SFS (Stepless Frequency Selection)
- FSB tuning from 200MHz up to 600MHz at 1MHz increment
- Memory tuning from 533MHz up to 1066MHz
Overclocking Protection
- ASUS C.P.R.(CPU Parameter Recall)
Special Features
100% All High-quality Conductive Polymer Capacitors! (5000hrs VRM, over 57 years operation lifespan at 65∘C)
ASUS MyLogo 2
Back Panel I/O Ports
1 x PS/2 Keyboard
1 x PS/2 Mouse
1 x S/PDIF Out (Optical)
1 x IEEE 1394a
1 x LAN(RJ45) port
6 x USB 2.0/1.1
8 -Channel Audio I/O
Internal I/O Connectors
3 x USB connectors (6 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 S/PDIF Out connector
Front panel audio connector
Chassis Intrusion connector
1 x COM connector
CD audio in
24-pin ATX Power connector
4-pin ATX 12V Power connector
System Panel (Q-Connector)
BIOS
8 Mb Flash ROM
AMI BIOS, PnP, DMI2.0, WfM2.0, SM BIOS 2.5, ACPI 2.0, ASUS EZ Flash 2, CrashFree BIOS 2
Accessories
User's manual
1 x UltraDMA 133/100/66 cable
4 x SATA cable
I/O Shield
Support Disc
Drivers
ASUS PC Probe II
Express Gate
ASUS AI Suite
Anti-virus software (OEM version)
ASUS Update
Form Factor
ATX Form Factor
12 inch x 9.6 inch ( 30.5 cm x 24.4 cm )