CPU Intel Socket 775 Core2 Quad/Core2 Extreme/Core2 Duo/Pentium dual-core/Celeron dual-core / Celeron Processors Chipset Intel P43 / ICH10 Front Side Bus 1600(O.C)/1333/1066/800 MHz Memory 4 x DIMM, Max. 16 GB, DDR2 1066/800/667 Memory Dual Channel memory architecture Expansion Slots 1 x PCIe x16 2 x PCIe x1 3 x PCI Storage Southbridge 6 xSATA 3 Gb/s ports JMicron JMB368 PATA controller 1 xUltraDMA 133/100/66 for up to 2 PATA devices LAN Realtek 8111C, PCIe Gigabit LAN controller featuring AI NET 2 Audio VIA VT1708S 8 -Channel High-Definition Audio CODEC - Support Jack Detection and Multi-streaming - Optical S/PDIF out ports at back I/O USB 12 USB 2.0 ports (6 ports at mid-board, 6 ports at back panel) ASUS Unique Features - ASUS EPU Lite - ASUS CrashFree BIOS 3 - ASUS EZ Flash 2 - ASUS MyLogo 2 - ASUS Express Gate Overclocking Features Precision Tweaker - vDIMM: 64 -step DRAM voltage control - vCore: Adjustable CPU voltage at 50mV increment SFS (Stepless Frequency Selection) - FSB tuning from 200MHz up to 600MHz at 1MHz increment Overclocking Protection - ASUS C.P.R.(CPU Parameter Recall) Back Panel I/O Ports 1 x Parallel 1 x PS/2 Keyboard 1 x S/PDIF Out (Optical) 1 x LAN(RJ45) port 6 x USB 2.0/1.1 1 x COM port 8 -Channel Audio I/O Internal I/O Connectors 3 x USB connectors support additional 6 USB ports 1 x Floppy disk drive connector 1 x IDE connector 6 x SATA connectors 1 x CPU Fan connector 1 x Chassis Fan connector 1 x Power Fan connector 1 x S/PDIF Out Header Front panel audio connector Chassis Intrusion connector System Panel CD audio in 24-pin ATX Power connector 1 x 4-pin ATX 12V Power connector BIOS 8 Mb Flash ROM AMI BIOS, PnP, DMI2.0, WfM2.0, SM BIOS 2.5, ACPI 2.0a Accessories User's manual 1 x UltraDMA 133/100/66 cable 1 x SATA cable I/O Shield Support Disc Drivers ASUS PC Probe II Anti-virus software (OEM version) ASUS Update Form Factor ATX Form Factor 12 inch x 8 inch ( 30.5 cm x 20.4 cm )