be quiet! Silent Wings Pro 4 120mm PWM 3000 RPM Premium Low Noise Cooling Fan | 4-Pin | BL098

Optimized fan blades for the highest performance on radiators and heat sinks | Speed switch allows changing maximum PWM speed between medium-speed, high-speed and ultra-high-speed (up to 3000 rpm) | Small tip clearance and a fan frame with a funnel-shaped air outlet for extremely high air pressure | Virtually inaudible operation at regular speed | 6-pole fan motor and fluid-dynamic bearing for less vibration and very smooth operations