be quiet! BL119 Silent Wings Pro 4 140mm PWM White case fan

Purpose and audience

The be quiet! BL119 Silent Wings Pro 4 is a 140mm PWM case fan designed for builders who prioritise low noise and strong static pressure. Its fluid-dynamic bearing and 6-pole motor deliver smooth operation at speeds up to 2400 RPM. The white, non-LED frame suits clean, light-themed builds without adding visual distraction.

Who it suits and who it doesn't

This fan suits radiator and heatsink mounting where high static pressure matters, thanks to optimised blades and a funnel-shaped outlet. The three-position speed switch lets users cap RPM at medium, high or ultra-high levels. Buyers needing RGB illumination or a different frame colour should look elsewhere, as this model is strictly white with no lighting.

Capacity and headroom

Maximum airflow reaches 95-100 CFM at 36.8 dBA, providing ample headroom for dense fin stacks or restrictive radiators. At reduced speeds the fan becomes virtually inaudible while still moving useful air volume. The single 4-pin PWM connector limits control to one header per fan, so multi-fan arrays require a splitter or hub.