Supported processors depending on chipset of your motherboard. Front Side Bus (FSB), Clock speed, and L2 cache should be checked with your motherboard. Email me if you have any questions. Intel AMD AMD Dual Core Intel Dual Core Intel Core 2 Dual & Quad 1066FSB (LGA775 for i965 & i975 chipsets) Quad-Core Intel Xeon Processor 5400 1600FSB series (LGA771) Intel Xeon LGA771, 1066/1333/1600FSB server Intel Core i7 Processor (Nehalem LGA1366) Intel Core 2 Processor (LGA775)