ARCTIC Alpine 11 Pro Rev. 2 CPU Cooler - Intel, Supports Multiple Sockets, 92mm PWM Fan at 23dBA Series: Alpine 11 Pro Rev. 2 Type: Fan & Heatsinks RPM: 500 - 2000 RPM (PWM) Air Flow: 36.7 CFM Noise Level: 0.4 Sone Power Connector: 4 Pin Compatibility: LGA 775 / 1155 / 1156 / 1150 Fan Mounting Types to Heatsink: Vertical |