be quiet! Pure Wings 3 BL109 140mm PWM Case Fan 1800 RPM

140mm PWM case fan for demanding cooling

The be quiet! Pure Wings 3 BL109 is a 140mm case fan built for desktop systems that need strong airflow. It spins up to 1800 RPM and delivers 70-75 CFM while keeping noise at 30.5 dBA at maximum speed. A 4-pin PWM connector allows precise speed control down to a very low minimum RPM for quiet idle operation.

Upgrade from stock or smaller fans

This fan replaces basic case fans or 120mm units when a build needs more air volume through a larger frame. The rifle bearing is rated for 80000 hours of life, making the step up worthwhile for systems that run continuously or push high thermal loads. The frame outlet is shaped to reduce leaks, which helps when the fan is mounted on a radiator.

High airflow headroom for radiators and dense meshes

The seven optimised blades push enough air to handle restrictive radiator fins or tight front-panel meshes without stalling. At full speed the fan moves 70-75 CFM, giving headroom for overclocked CPUs or multi-GPU setups. In wide-open cases with little restriction the extra pressure is less critical, so the benefit drops off.