Noctua NH-U12P SE1366 for Intel LGA 1366 4 Dual Heat-Pipe 120 mm SSO Bearing Quiet CPU Cooler - Retai Noctua NH-U12P SE1366 for Intel LGA 1366, 4 Dual Heatpipe 120mm SSO Bearing Quiet CPU Cooler_ Retail Spec.Type : Fan & Heatsinks Fan Size : 120 x 120 x25mm , Available for Two Fans installed. RPM +/- 10% : 1300 RPM ( standard ), 1100 RPM ( w/ L.N.A ), 900RPM ( w/ U.L.N.A.).Air Flow : 92.3m/h (standard) Acoustical Noise : 19.8 dB(A)/standard, 16.9dB(A)(w/ L.N.A ), 12.6dB(A) ( w/ U.L.N.A.) Features :Award-winning NH-U12P Heatsink, Raised Fin-stack of U-type Design for Perfect airflow direction and excellent compatibility.