Zalman CPU Cooler for Intel Socket 2011/1155/1156/1366/775 and AMD Socket FM1/AM3+/AM3/AM2+/AM2 CNPS12X Material: Pure Copper and Aluminum Dissipation Area: 9635 cm2 Fan: 120mm Low Noise Blue LED Fan Speed: 850 ~ 1100 rpm +/- 10% (w/ RC5); 950 ~ 1200 rpm +/- 10% (w/o RC5) Noise Level: 22 dBA +/- 10% (w/ RC5); 24 dBA +/- 10% (w/o RC5) Heat pipes: 6 Rated Voltage: 12V