AMD ATHLON II X2 270 We are testing Athlon II X2 270 CPU against Athlon II X2 255 CPU. Athlon II X2 270 is clocked at 3400Mhz while Athlon II X2 255 is clocked at 3100Mhz which is 3% slower. Athlon II X2 270 supports MMX+, 3DNow+, SSE, SSE2, SSE3, SSE4A, x86-64 and AMD-V. We will be using some interesting Benchmarks for testing Athlon II X2 270 and Athlon II X2 255 which are:- Windows Experience, Cinebench, Computmark, Everest, Geekbench, Nuclearus and Performance Test. Games are Hawk 2, Lost Planet 2, Mafia 2, Metro 2033 and Resident Evil 5."