Full Details from Amazon.com : http://www.amazon.com/gp/product/B0078IWQ2M?tag=onigi-20
Xigmatek Desktop Computer Heatsink Cooling Fan AEGIR SD128264
HDT Heat-pipe direct touch technology
Support for LGA77511561366 AM2AM2AM3
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
