Xigmatek Desktop Computer Heatsink Cooling Fan AEGIR SD128264 H.D.T. (Heat-pipe direct touch) technology Support for LGA775/1156/1366; AM2/AM2+/AM3. Dual fan installed option and Anti-vibration rubbers attached. Double layer HDT & Double performance. 2pcs X8mm & 4pcs X6mm high performance heat-pipes. PWM fan to adjust the power of the fan efficiently Anti-vibration rubbers prevent vibration and absorb noise.