Thermaltake Venus CL-P0075 Cooler for AMD Opteron, Athlon 64, and Athlon 64 FX55 Designed for AMD Opteron and Athlon 64/Athlon 64 FX55 High density thin fin, more surface area provides excellent heat dissipation Copper base with heatpipe technology Tool-free clip for easy installation Heatpipe technology transfers the heat quickly