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be quiet! Silent Wings 4 140mm PWM High Speed 1900 RPM Premium Low Noise Cooling Fan | 4-Pin | BL097
be quiet!

be quiet! Silent Wings 4 140mm PWM High Speed 1900 RPM Premium Low Noise Cooling Fan | 4-Pin | BL097

Bottom line: The be quiet! Silent Wings 4 140mm PWM High Speed 1900 RPM Premium Low ($24.90 on Amazon as of 2026-10-06): Rated 29.3 dB(A) at maximum speed, not just at idle RPM; main trade-off: high-speed 1900 RPM variant costs more than standard Silent Wings 4.

$24.90

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Buy on Amazon — $24.90 Compare to similar retro cpu coolers & fans

By , Founder & Editor-in-Chief · Listing data updated

Mike Perry — Hardware researcher since 2014. For retro PC hardware and period-correct parts, synthesises manufacturer documentation, community compatibility lists and marketplace listings rather than first-hand lab testing. Core beat: GPU performance across gaming, rendering, and local-LLM inference.

*Price sourced from Amazon.com. Last updated 2026-10-06. Price and availability subject to change.

Pros & Cons

Pros

  • ✓ Rated 29.3 dB(A) at maximum speed, not just at idle RPM
  • ✓ 300,000-hour fluid-dynamic bearing rating suits 24/7 builds
  • ✓ Funnel-shaped frame plus tight blade gap raises static pressure
  • ✓ Ships with both anti-vibration and rigid radiator mounts

Cons

  • ✗ High-speed 1900 RPM variant costs more than standard Silent Wings 4
  • ✗ 140mm only - no 120mm mounting without an adapter bracket
  • ✗ All-black design has no RGB or addressable lighting
  • ✗ Audible at full 1900 RPM despite the low-noise branding

Manufacturer description

The be quiet! Silent Wings 4 140mm PWM High Speed is built for the cases where a standard 140mm fan runs out of headroom: dense radiators, thick heatsink fin stacks, and restrictive front panels. Its funnel-shaped frame and tightened blade-to-frame clearance push static pressure up, so airflow actually makes it through the obstruction instead of spilling around it. The 6-pole, 3-phase motor keeps power draw and vibration low, and be quiet! rates maximum operation at 29.3 dB(A) - meaning the fan stays effectively inaudible through the middle of its PWM curve and only becomes noticeable at…

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SpecPicks Verdict

SpecPicks scored be quiet! Silent Wings 4 140mm PWM High Speed 1900 RPM Premium Low… using a rating × review-volume × price-fit model applied to published specs and reviews across the retro cpu coolers & fans category. be quiet!'s retro cpu coolers & fans lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for retro cpu coolers & fans of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.

Frequently Asked Questions

How loud is the Silent Wings 4 140mm high speed at full RPM?

be quiet! rates maximum operation at 29.3 dB(A). The 6-pole, 3-phase motor design keeps it virtually inaudible at mid-speed, with noise rising toward the 1900 RPM ceiling.

Is this fan good for radiators or just case airflow?

Both. The reduced blade-to-frame distance and funnel-shaped frame generate high static pressure for radiators and heatsinks, and the box includes rigid plastic mounts specifically for that use alongside case mounting.

What mounting hardware comes in the box?

Two options: pre-installed anti-vibration mounts that damp chassis vibration, and separate plastic mounts intended for radiators and heat sinks. No extra purchase is needed for either scenario.

How long will this fan last?

The advanced fluid-dynamic bearing (FDB) is rated for up to 300,000 hours of service life. The same bearing reduces vibration transfer, which is part of why the fan stays quiet over time.

Will it work with a 3-pin fan header?

This is a 4-pin PWM fan (model BL097), so PWM speed control requires a 4-pin header. Check your motherboard or fan controller documentation for header type and any voltage-control fallback behavior.

Key Features

  • Silent Wings 4 140mm PWM high-speed is the fan of choice for all possible operations. Be it in a case, on radiators or heat sinks – Features like the silence-optimized fan blades and the funnel shaped fan frame make Silent Wings 4 140mm PWM high-speed a fan that makes no compromises between very quiet operation and highest performance.
  • Silent Wings 4 140mm PWM high-speed makes for extraordinary air pressure and, therefore, significant increases in the system’s performance. The decreased distance between the fan blades and the frame makes it possible. By that, the Silent Wings 4 140mm PWM high-speed allows the user to run even the most demanding applications.
  • Silent Wings 4 140mm PWM high-speed has 2 mounting options in the scope of delivery. The pre-installed anti-vibration mounting reduces noise-generating vibrations to a minimum. For radiators and heat sinks, the plastic mounting is the first choice. Both solutions have in common that they enable virtually inaudible operation at regular speed.
  • The key for virtually inaudible operation when needed 6-pole fan motor with 3 phases for very low power consumption, less vibration and therefore quiet max. operation of 29.3dB(A). Equipped with this state-of-the-art technology the fan is virtually inaudible when operated in mid-speed.
  • The advanced fluid-dynamic bearing (FDB) enables a super long fan life of up to 300,000 hours. In addition, it reduces the vibrations significantly and supports the virtually inaudible operation of Silent Wings 4 140mm PWM high-speed.
  • Be it as a radiator fan or in the case: Silent Wings 4 140mm PWM high-speed always makes a good impression. The all-black design combined with the high-grade fan sticker makes the fan shine in any system. This makes Silent Wings 4 140mm PWM high-speed a high performant and an incredibly good-looking fan.

Full Specifications

Brandbe quiet!
ModelBL097
Voltage12 Volts (DC)
Wattage5.7 watts
MaterialCopper
Set NamePWM High-Speed
Unit Count1.0 Count
Noise Level29.3 Decibels
Part NumberBL097
Material TypeCopper
Cooling MethodFan
Number of Items1
Vibration/RumbleYes
Air Flow Capacity78.4 Cubic Feet Per Minute
Compatible DevicesRadiator, Desktop, Graphic Cards
Power Connector Type4-Pin
Warranty Description1 year
Maximum Rotational Speed1900 RPM
Item Dimensions L x W x H5.51"L x 5.51"W x 0.98"H
Global Trade Identification Number04260052188897

Ready to buy?

be quiet! Silent Wings 4 140mm PWM High Speed 1900 RPM Premium Low Noise Cooling Fan | 4-Pin | BL097 is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

Buy on Amazon — $24.90

*Price sourced from Amazon.com. Last updated 2026-10-06. Price and availability subject to change.

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be quiet! Silent Wings 4 140mm PWM High Speed 1900 RPM Premium Low Noise Cooling Fan | 4-Pin | BL097
$24.90
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