ChipsetNVIDIA nForce 520LECPU SUPPORTAMD Athlon™ X2 Dual-Core Processor AMD Athlon™ 64 X2 Dual-Core Processor AMD Athlon™ 64 FX Processor AMD Athlon™ 64 Processor AMD Sempron™ Processor HTSupport HT 2G MEMORYSupport Dual Channel DDR2 533/667/800 MHz 4 x DDR2 DIMM Memory Slot Max. Supports up to 8GB Memory EXPANSION SLOT1 x PCI-E x16 Slot 2 x PCI-E x1 Slot 3 x PCI Slots STORAGE2 x SATA2 Connector 1 x IDE Connector Support SATA RAID: 0,1 USB4 x USB 2.0 Port 2 x USB 2.0 Header LANRealtek RTL8201CL - 10/100 PHY CODECRealtek ALC861VD 6-Channel HD Audio REAR I/O1 x PS/2 Mouse 1 x PS/2 Keyboard 4 x USB 2.0 Port 1 x COM Port 1 x RJ-45 Port 3 x Audio Connector INTERNAL I/O1 x Printer Header 2 x USB 2.0 Header 2 x SATA2 3Gb/s Connector 1 x IDE Connector 1 x Floppy Connector 1 x Front Audio Header 1 x Front Panel Header 1 x CD-IN Header 1 x S/PDIF-OUT Header 1 x CPU FAN Header 1 x System FAN Header DIMENSIONATX Form Factor Dimension: 20.cm X 29.3cm ( W x L ) OS SUPPORTSupport Windows 2000 / XP / Vista /Vista 64 ACCESSORIES1 x IDE Cable 1 x FDD Cable 1 x SATA Cable 1 x I/O Shield 1 x CD Driver 1 x User Manual FEATURESSupports BIOS-Flasher