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White 140 mm PWM case fan with nine white blades and a white frame

be quiet!

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

SKU CH-7GWG-93VKQ MPN BL119

A 140mm PWM case fan delivering 95-100 CFM airflow at 2400 RPM with a fluid-dynamic bearing for quiet 36.8 dBA operation and a speed switch for three performance modes

  • Fan size140 mm
  • Number of fans1 Fan
  • Bearing designFluid Dynamic Bearing
  • Rotational speed2,400 RPM
  • Airflow rate95-100 CFM
  • Operating noise36.8 dBA at max RPM

Model 140mm PWM

Color White

  • Optimized blades deliver highest performance on radiators and heatsinks
  • Speed switch selects medium, high or ultra-high speed up to 2400 rpm
  • Small tip clearance and funnel-shaped outlet create extremely high air pressure
  • 6-pole motor with fluid-dynamic bearing reduces vibration for smooth operation
  • Separate mounting kits included for case or radiator installation

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.

How it compares

Measured against everything we stock in PC Cooling Fans, at today’s prices. Recalculated every night.

Price $28.99
Pricier than about 72% of the 8,339 comparable items (median $19.99).
Fan size 140 mm
Higher than about 80% of the 1,114 comparable items (median 120 mm).

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Specifications

Product
Brand namebe quiet!
Product typeCase Fan
Product colorWhite
Performance
Rotational speed2,400 RPM
Airflow rate95-100 CFM
Power
Power input connector4-pin PWM
Size & build
Fan size140 mm
Number of fans1 Fan
Bearing designFluid Dynamic Bearing
Shipping weight0.45 kg
Package size203 × 140 × 38 mm
Environment & compliance
Operating noise36.8 dBA at max RPM
More details
LED lightingNon-LED

Other versions of this model

3 more in the same range

Questions about this item

Does the 4-pin PWM connector on this fan plug straight into a standard motherboard fan header?

Yes, the 4-pin PWM connector is compatible with standard motherboard fan headers for automatic speed control.

Will the 140mm frame and supplied mounting hardware let me replace an older 140mm fan on my radiator without new screws?

The fan includes individual mounting systems for both case and radiator use, so it fits standard 140mm radiator screw holes.

How can I verify the speed switch is actually changing the maximum RPM up to 2400 rpm after installation?

Use monitoring software or the BIOS to observe the reported fan speed; the switch selects medium, high or ultra-high profiles that top out at 2400 rpm.

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