Features : Large Aluminum base enhances great thermal conductivity Uses 8 cm fan provides more powerful airflow Silent solution Tool-less clip, easy to install Support AMD socket 754, 939, 940 and AM2 Specifications: Overall dimensions: 80 x 80 x 65mm Fan dimensions: 80 x 80 x 25mm Heatsink material: aluminum Rated voltage: 12V Rated current: 0.11A +/- 10% Power consumption: 1.32W +/- 10% Rated speed: (add heatsink to fan) 2,650 +/- 10%rpm Rated speed: 2,500 +/- 10%rpm Airflow: 27.16 CFM Static pressure: 0.07 InchH2O Noise level: <27.4dBA No. of pole: 4 pole Rotation direction: clockwise Bearing type: Ever Lubricate bearing (Long Life bearing) Life time: (ambient temp: 25 deg. C 40,000 hours