Cooler Master S2N-7DDLS-L6-GPApplication: 2U+ Active SolutionSupported CPU Frequency: All 775 Socket up to 95WSocket Type: LGA 775Heat Sink: Copper inserted + Al Stacked FinFastener: Screw + SpringInterface Material: Shin Etsu 7762Fan Speed: 4000 RPMFan Dimension: 70x70x15 MMFan Air Flow: 38.11 CFMFan Life Expectancy: 70000 hrsFan Bearing Type: Dual Ball BearingVoltage Rating: 12 VNoise Level: 42 dBAConnector: 4-Pin with PWMBack Plate: IncludedThermal Resistance: 0.45 °C/W for Pentium 4 / 0.33 °C/W for Pentium D