Building a Socket 775 system? Add this Deepcool ALPHA 400 ST heat sink and fan to your desktop computer and help keep your Intel CPU cool for maximum performance! The IC4100AST features an aluminum fin heat sink with a copper base and super silent 3.62-inch (92 mm) Hydro Bearing fan. Plus, with four copper heatpipes built into the heat sink, the IC4100AST provides excellent heat transfers! This CPU cooler supports Intel Core 2 Extreme, Core 2 Quad, Core 2 Duo, Pentium Dual-Core, Pentium D, Pentium 4, Celeron Dual-Core, Celeron D and Celeron Socket 775 processors up to 95-watts. Keep your CPU cool with the Deepcool ALPHA 400 ST heat sink and fan!