Multiple support bracket system For Socket 2011/1366/1156/1155/775 & AM2/AM3.The Best C/P CPU Cooler for Overclockers & Gamer!Proprietary through holes on fins for efficient ventilation.Fanless design for low-noise operation.Including one Thermalright TY-140 Utra-low noise 900~1300RPM PWM-Fan (MAX21 dBA).Convex copper base design, to ensure the highest thermal conducting thermal efficiency between the cpu and the heatsink.