Thermaltake Silent Boost RX CL-P0296 for AMD Opteron, Athlon 64, Athlon 64 FX, Sempron Socket 939, 754, M2 Designed for AMD Opteron, Athlon 64, Athlon 64 FX, Sempron Socket 939, 754, M2 All-copper heatsink, larger area for improving heat dissipation Support 9 or 8cm fan Tool-free metal clip that is easy to install Unique Reversed Fan reduces the noise from air-rebounding and create better air flow for heat dissipation