Atx Amd AM2 NFORCE500 Sli 4DDR2 Gblan 2PCI-E 2PCI Raid Supports 64-bit AMD Sempron, Athlon 64 /Athlon 64 X2 processor (Socket AM2) Four 240-pin DIMM sockets, designed to support up to 8GB of DDR2 800/667/533 MHz Dual channel memory NV RAID supports 4 x SATA II 3.0 Gb/s ports RAID 0 or 1, 0+1, 5, JBOD is supported 1 x Fast ATA-133 IDE controller