Zalman Ultra Quiet CPU Cooler for Intel LGA2011/1366/1156/1155/775 and AMD Socket FM1/AM3+/AM3/AM2+/AM2 CNPS14X Material: Pure Copper and Aluminum Dissipation Area: 10.466 cm2 Fan: 140mm Ultra Quiet Fan Speed: 950 ~ 1,350 rpm +/- 10% Noise Level: 17 ~ 21 dBA +/- 10%