AMD ATHLON II X2 260 We are testing the Athlon II X2 260 CPU against the Athlon II X2 255 CPU. The Athlon II X2 260 is clocked at 3200Mhz while the Athlon II X2 255 is clocked at 3100Mhz which is 4% slower. The Athlon II X2 260 supports MMX+, 3DNow+, SSE, SSE2, SSE3, SSE4A, x86-64 and AMD-V. We will be using some interesting Benchmarks for testing the Athlon II X2 260 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."