AMD Athlon 64 X2 5400+ 2.8GHz 2x512KB Socket AM2 Dual-Core CPU AMD Athlon 64 X2 5400+ 2.8GHz 2x512 KB Socket AM2 Dual-Core CPU General Features: AMD Athlon 64 X2 5400+ Dual-Core Processor 2800 MHz (2.8 GHz) frequency 512 x 2 KB L2 cache Socket AM2 HyperTransport technology AMD64 technology AMD Cool'n'Quiet technology Enhanced Virus Protection 32/64-bit oeprating mode