The ARCTIC AF 12Pro PWM fan outperforms other 120mm fans in the market, in regards to its performance and noise ratio. With efficient central cooling, the ARCTIC F 12Pro PWM fans offer excellent cooling and noise control performance for the system. Bearing Type: Fluid Dynamic RPM: 400 - 1500 RPM (controlled by PWM) Air Flow: 57 CFM Noise Level: 0.5 Sone Power Connector: 4 Pin PWM Color: White Compatibility: Case Dimensions: 120 x 120 x 34mm