Cpu socket a for amd athlon xp / sempron processor fsb 400(oc)/333/266 mhz chipset sis746 fx / 963(l) memory 2 x 184-pin dimm sockets support two 2.5v ddrams (ddr400/333/266/200) maximum: 2gb expansion slots 1 x agp 8x 4 x pci lan via vt6103l 10/100mbps fast ethernet phy audio alc655 6-channel audio codec compliant with ac'97 2.3 specification ide 2 x ultradma 133/100/66 back panel i/o ports 1 x ps/2 keyboard 1 x ps/2 mouse 1 x parallel port 1 x serial port 4 x usb 2.0 ports 1 x rj 45 port 1 x audio i/o (line-in, line-out and mic-in) internal i/o connectors & headers 20-pin atx power supply connector 1 x floppy connector-support 360k~2.88mb fdds 1 x cd in header 1 x speaker header 1 x usb header support additional 2 usb2.0 ports 1 x front panel switch/led header cpu / chs fan headers 1 x front panel audio header 1 x usb card reader header system bios ami 2mb flash rom supports plug and play 1.0a, apm 1.2, multi boot, dmi full support for acpi revision 1.0 specification form factor atx form factor, 305*190mm