Computer case Fan 12 cm 2200 RPM 36.99 dB 80.47 cfm 2.95 mmH2O Fluid Dynamic Bearing (FDB) Pulse-width modulation (PWM) support 120 x 120 x 30 mm Black Air-Concentrating DesignThe well-designed case frame and curves make the airflow stronger, reduce turbulent flow and fan noise and enhance the efficiency.PWM Daisy-Chain DesignTo avoid signal interference, fans are daisy-chained with 3-pin connectors.But the fans fully support the PWM function.Vibration-Absorbing & Anti-Noise PadsThe 8 x 6mm rubber pads can efficiently reduce vibration and noise. Performance Bearing type Fluid Dynamic Bearing (FDB) Pulse-width modulation (PWM) support Yes Maximum air pressure 2.95 mmH2O Minimum air pressure 0.25 mmH2O Maximum airflow 80.47 cfm Minimum airflow (imperial) 18.17 cfm Noise level (high speed) 36.99 dB Rotational speed (max) 2200 RPM Rotational speed (min) 600 RPM Fan diameter 12 cm Type Fan Suitable location Computer case Design Fan connector 4-pin Number of fan blades 7 Number of fans 3 fan