Socket Type Intel P4/478 Heat Sink Dimension 83 x 68 x 50 mm Heat Sink Material 100% Copper Stacked Fin Fan Dimension 80x80x80 mm Fan Speed 1900~3500 rpm Fan Airflow 12.0~22.1 CFM Fan Air Pressure 3.15 ~ 10.70 mm H2O Fan Life Expectance 50,000 hrs Bearing Type Dual ball bearing Voltage Rating 5.0~13.8V Noise Level 21~41dBA Connector 4 Pin (Power Input), 3 Pin (Speed Detection) Weight 700g Thermal Resistance Rca 0.41~0.35 ℃/W Application Intel Pentium 4 3.4 GHz and Higher