AM2 Athlon 64 X2 Dual-core/athlon 64/SEMPRON, Fsb 1000/667/533 Mhz, Nvidia C51PV (Discontinued by Manufacturer) Processor Support - Support AMDR Athlon 64 X2, Athlon 64 and Sempron in the Socket AM2 package. Supported FSB - HyperTransport supporting speed up to 1GHz (2000MT/s) Chipset - North Bridge: nVidia?C51PVG Chipset , South Bridge: nVidia?MCP51 Chipset LAN - Supports 10/100/1000 Fast Ethernet LAN by Vitesse VSC8601 Memory - Supports DDR2 400/533/667/800 SDRAM (4GB Max), Transfer rate is up to 400Mb