Type: Fan & Heatsinks RPM: 1200 RPM (NF-P14 PWM), 1300 RPM (NF-P12 PWM) (+/- 10%) 900 RPM (NF-P14 PWM), 900 RPM (NF-P12 PWM) (with Low-Noise Adaptor +/- 10%) Air Flow: 110.3m³/h (NF-P14 PWM), 92.3m³/h (NF-P12 PWM) 83.7m³/h (NF-P14 PWM), 63.4m³/h (NF-P12 PWM) with Low-Noise Adaptor Noise Level: 19.6 dB(A) (NF-P14 PWM), 19.8 dB(A) (NF-P12 PWM) 13.2 dB(A) (NF-P14 PWM), 12.6 dB(A) (NF-P12 PWM) with Low-Noise Adaptor Heatsink Material: Copper (base and heat-pipes), aluminium (cooling fins), soldered joints & nickel plating Compatibility: LGA 2011 Fan Dimensions: 140 x 140 x 25 mm 120 x 120 x 25 mm Heatsink Dimensions: 158 x 126 x 120 mm(with fan)