Zalman CPU Cooler for Intel Socket 1155/1156/1366/775 and AMD Socket FM1/AM3+/AM3/AM2+/AM2 CNPS7XLED Material: Pure Copper and Aluminum Fan: Ultra Quiet 92mm Blue LED PWM Fan Performance Mode (without RC33P): 1,500 ~ 1,950rpm +/- 10%, Quiet Mode (with RC33P): 1,250 ~ 1,500rpm +/- 10% Performance Mode (without RC33P): 20 ~ 25dBA +/- 10%, Quiet Mode (with RC33P): 17 ~ 20dBA +/- 10% Rated Voltage: 12V