AMD X2 260 Amd X2 260 vs Amd X2 255 to find out which is the fastest using Octane, Nuclearus, Sunspider. Amd X2 260 is 3.2Ghz and Amd X2 255 is 3.1Ghz. Amd X2 260 is Regor and Amd X2 255 is Regor. Amd X2 260 is Dual Core and Amd X2 255 is Dual Core."