Having received more than 250 awards and recommendations from the international press, Noctua"s NH-D14 has become a benchmark in premium quality quiet cooling. The SE2011 version is a special edition for Intel"s Core i7-39xx/38xx (Sandy Bridge-E) high-end platform and comes equipped with the new SecuFirm2 mounting system for LGA2011. Combined with the exquisite NF-P12/NF-P14 dual PWM fan configuration and topped off with Noctua"s renowned NT-H1 thermal compound, the NH-D14 SE2011 is an elite choice for an elite platform. Type: Fan & Heatsinks Fan Size: 140 x 140 x 25mm (NF-P14 PWM) / 120 x 120 x 25mm (NF-P12 PWM) Compatibility: Intel Core i7-39xx/38xx (Socket LGA2011). Bearing Type: SSO-Bearing ( Self-stabilizing oil-pressure bearing ) Blade Geometry: Nine Blade Design with VCN Max. RPM (+/- 10%): 1200 RPM (NF-P14 PWM), 1300 RPM (NF-P12 PWM) Max. RPM with Low-Noise Adaptor (+/- 10%): 900 RPM (NF-P14 PWM), 900 RPM (NF-P12 PWM) Max. Air Flow: 110.3 cubic meter/h (NF-P14 PWM), 92.3 cubic meter/h (NF-P12 PWM)Max. Air Flow with Low-Noise Adaptor: 83.7 cubic meter/h (NF-P14 PWM), 63.4 cubic meter/h (NF-P12 PWM) Acoustical Noise: 19.6 dB(A) (NF-P14 PWM), 19.8 dB(A) (NF-P12 PWM) Acoustical Noise with Low-Noise Adaptor: 13.2 dB(A) (NF-P14 PWM), 12.6 dB(A) (NF-P12 PWM) Input Power: 0.96W (NF-P14 PWM), 0.6W (NF-P12 PWM) Voltage Range: 12VMTBF > 150,000 h. Material: Copper (Base and Heat-pipes), Alum.(cooling Fins),Soldered Joints, Nickel Plated. Dimension: 6.30" x 5.51" x 5.12" ( Without Fan ), 6.30" x 5.51" x 6.22" ( With Fan) Weight: 2.36 Lbs. ( Without Fan ), 2.73 Lbs. ( With Fan ) Package Dimension: 8" x 8" x 9.5" (L x Wx H), 4.5Lbs