Model: XT-964 Intel: Socket 1366/775/Core i7 (Nehalem)/Core 2 Extreme/Quad/Duo/Pentium Extreme Edition/Celeron D AMD: Socket AM2/754/939/940/Athlon 64/FX/X2/Opteron/Sempron 4 pcs High Performance U Type Heat-pipe Touch w/ CPU Chip Easy installation Direct H.T.C. (Heat-pipe Touch Chip) Technology 4 Copper Heatpipes 92 mm NDB Fan Aluminum fin Light weight Tool-Free clip Universal Application: 1366/LGA775 push-pin & AM2/K8 Tool-Less Clip