ECS Elitegroup SOCKET 939, NFORCE4,ATX NFORCE4-A939 (V1.0) SKT 939 for AMD Athlon 64 x2 Dual-Core/ Athlon 64/ Athlon 64 FX processor. Dual-Channel DDR 400/333/266; FSB 2000 MT/S; PCI-E GIGA LAN; USB 2.0; 4 X SATA; RAID 0, 1, 0+1; 6-Channel Audio NVIDIA Firewall protects your PC from intruders by filtering unauthorized traffic nTune - Easy, safe and high performance overclocking available for NVIDIA NFORCE. Performance wizards allow automatic tuning for optimal performance or the quietest operation.