Lightweight copper heatpipe and aluminum fin hybrid design Ball bearing fan for extended life. Performance is compatible with: Intel socket 478 Celeron , Celeron D, Celeron M, Pentium & Pentium M AMD socket 754, 939 & 940 Sempron , Turion , Opteron , Athlon 64 & 64FX Air Flow 30 CFM Acoustic Noise 34.9 dBA (max)