AMD Athlon II X4 640 3.0GHz Quad-Core Desktop CPU Processor ADX640WFK42GM Socket AM3 2MB 95W Bus speed:667 MHz Memory controller,One 2000 MHz 16-bit HyperTransport link. Clock multiplier:15,Sockets:Socket AM2+, Socket AM3. 4 cores, L2 cache:4 x 512 KB,Thermal Design Power:95 Watt. Warranty:3 months, fully tested in perfect working condition. Please consult us whether support your motherboard before buying.