AMD Phenom II x2 B55 3.0ghz Business Dual Core Processor CPU AMD Phenom II X2 B55 dual-core processor, 3.0 GHz clock speed 6 MB L3 cache, 2 x 512 KB L2 cache, 2 x 128 KB L1 cache Socket AM3 (backwards compatible with AM2+) C2 Revision Heat sink and fan not included