AMD Phenom II X4 820 2.8GHz 4x512KB L2/4MB L3 Socket AM3 Quad-Core CPU AMD Phenom II X4 820 2.80 GHz 4x512KB Socket AM3 Quad-Core CPU General Features: AMD Phenom II X4 820 Quad-Core processor Native quad-core die 2.80 GHz clock speed Supports HyperTransport 3 technology L2 cache: 4 x 512 KB L3 cache: 4 MB shared Bus Speed: 667 MHz Socket AM3 Wattage: 95W CMOS: 45 nm SOI Integrated Memory Controller SSE/SSE2/SSE3/SSE4a