ZALMAN Computer Noise Prevention System with Pure Copper Heatpipe Heatsink CPU Cooler CNPS9300AT 100% copper heat sink with aerodynamically optimized "tunnel" design for maximum cooling efficiency. Patented "figure 8" heat pipe design for cooling performance of up to 4heatpipes with the use of just 2. Compatible with all Intel Socket 775 based Single, Dual, and Quad Core CPUs, and all AMD Socket AM2+, AM2, 754, 939, 940 based Single, Dual, and Quad Core CPUs.