be quiet! Silent Wings Pro 4 140mm PWM
Expert rating9 / 10
- Fan Size:
- 140mm
- Airflow:
- 78.8 CFM
- Static Pressure:
- 2.42 mmH2O
- Noise Level:
- 29.4 dBA
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Disclaimer: The price and specification of the given product may differ from the actual product. Please confirm on the retailer's website before buying.
Manufacturer: be quiet! Last updated: 2026-09-12
Where to buy
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be quiet! Silent Wings Pro 4 140mm PWM (140mm/78.8 CFM/2.42 mmH2O Static Pressure/1900 RPM Max/29.4 dBA/Fluid Dynamic Bearing/No RGB/PWM) Review
For a 140mm fan built to push through a 280mm or 420mm radiator rather than just move open air, the Silent Wings Pro 4 140mm is be quiet!'s pressure-tuned answer.
We'd use it on any large-format AIO where the standard Silent Wings 4 or a generic case fan struggles once fin density goes up, since the extra pressure holds up better under restriction.
Where It Excels
The 140mm Pro 4 keeps the same six-pole motor and pressure-tuned blade as its 120mm sibling, scaled up, so it moves more absolute air while still handling restriction better than an airflow-tuned 140mm fan.
Comparison to Alternatives
Against the be quiet! Light Wings 140mm PWM high-speed already in this catalog, the Pro 4 gives up the ARGB lighting entirely but wins clearly on static pressure, so radiator duty should default here and lighting-focused intake duty to the Light Wings. Against the Arctic P14 PWM PST in the catalog, the Pro 4 costs more but runs quieter at a comparable pressure figure, which is the trade-off to weigh for a multi-fan radiator loadout.
Specifications
Identity and packaging
| Brand | be quiet! |
|---|---|
| Model | Silent Wings Pro 4 140mm PWM |
| Fan Thickness | 25 mm |
Design
| Fan Size | 140 mm |
|---|---|
| Bearing Type | Fluid Dynamic |
| Lighting | No RGB |
Performance
| Static Pressure | 3.64 mmH2O |
|---|---|
| Max Speed | 2400 RPM |
| Noise Level | 36.8 dBA |
| PWM Control | Yes |
Performance at maximum speed
| Airflow | 97.4 CFM |
|---|
Motor and bearing
| Rated Life | 300000 hours |
|---|
Power and control
| Max Power Draw | 6 W |
|---|
Connection and daisy chain
| Connector Type | 4-Pin PWM |
|---|---|
| Lighting Connector | None |
Lighting
| RGB Lighting | No |
|---|---|
| Lighting Type | None |
Physical and finish
| Colorway | Black |
|---|---|
| Cable Length | 500 mm |
| Weight | 258 g |
Market
| Warranty | 5 years |
|---|---|
| Positioning | Premium |
| Source URL | https://www.bequiet.com/en/casefans/3706 |
|---|
Expert Review
Reviewed by Burooj Alam. Rated by us, not by users.
Expert rating9 / 10
One of the strongest 140mm radiator fans available, at the cost of skipping RGB entirely.
Best for
- 280mm and 420mm AIO radiators
- Quiet high-pressure builds
- Large-format air cooler intake duty
Not for
- RGB-focused builds
- Open mesh cases where pressure is wasted
- Tight budgets buying six or more fans
FAQs
What are the key specifications of the be quiet! Silent Wings Pro 4 140mm PWM (140mm/78.8 CFM/2.42 mmH2O Static Pressure/1900 RPM Max/29.4 dBA/Fluid Dynamic Bearing/No RGB/PWM)?
The be quiet! Silent Wings Pro 4 140mm PWM (140mm/78.8 CFM/2.42 mmH2O Static Pressure/1900 RPM Max/29.4 dBA/Fluid Dynamic Bearing/No RGB/PWM) is a case fan from be quiet!. Key specs: Fan Size 140, Bearing Type Fluid Dynamic, Lighting No RGB, Airflow 78.8, Static Pressure 2.42.
Will the be quiet! Silent Wings Pro 4 140mm PWM (140mm/78.8 CFM/2.42 mmH2O Static Pressure/1900 RPM Max/29.4 dBA/Fluid Dynamic Bearing/No RGB/PWM) work with my current setup?
The be quiet! Silent Wings Pro 4 140mm PWM (140mm/78.8 CFM/2.42 mmH2O Static Pressure/1900 RPM Max/29.4 dBA/Fluid Dynamic Bearing/No RGB/PWM) lists Fan Size is 140. Check that against the hardware you already own before buying, since this is the field that most often decides whether a part fits.
Who is the be quiet! Silent Wings Pro 4 140mm PWM (140mm/78.8 CFM/2.42 mmH2O Static Pressure/1900 RPM Max/29.4 dBA/Fluid Dynamic Bearing/No RGB/PWM) best suited to?
It suits 280mm and 420mm aio radiators, quiet high-pressure builds, large-format air cooler intake duty.
What are the drawbacks of the be quiet! Silent Wings Pro 4 140mm PWM (140mm/78.8 CFM/2.42 mmH2O Static Pressure/1900 RPM Max/29.4 dBA/Fluid Dynamic Bearing/No RGB/PWM)?
It is a poor fit for rgb-focused builds, open mesh cases where pressure is wasted, tight budgets buying six or more fans.
Compare and read more
- be quiet! Silent Wings Pro 4 140mm PWM (140mm/78.8 CFM/2.42 mmH2O Static Pressure/1900 RPM Max/29.4 dBA/Fluid Dynamic Bearing/No RGB/PWM) vs Noctua NF-A12x25 PWM chromax.black.swap (120mm/60.1 CFM/2.34 mmH2O Static Pressure/2000 RPM Max/22.6 dBA/SSO2 Bearing/No RGB/PWM)
- be quiet! Silent Wings Pro 4 140mm PWM (140mm/78.8 CFM/2.42 mmH2O Static Pressure/1900 RPM Max/29.4 dBA/Fluid Dynamic Bearing/No RGB/PWM) vs Noctua NF-F12 PWM (120mm/53.7 CFM/2.61 mmH2O Static Pressure/1500 RPM Max/22.4 dBA/SSO2 Bearing/No RGB/PWM)
- be quiet! Silent Wings Pro 4 140mm PWM (140mm/78.8 CFM/2.42 mmH2O Static Pressure/1900 RPM Max/29.4 dBA/Fluid Dynamic Bearing/No RGB/PWM) vs Cooler Master MobiusLink ARGB Fan (120mm/62.0 CFM/2.4 mmH2O Static Pressure/2000 RPM Max/30.0 dBA/Loop Dynamic Bearing/ARGB/PWM)
- be quiet! Silent Wings Pro 4 140mm PWM (140mm/78.8 CFM/2.42 mmH2O Static Pressure/1900 RPM Max/29.4 dBA/Fluid Dynamic Bearing/No RGB/PWM) vs Corsair iCUE Link RX120 (120mm/61.5 CFM/1.83 mmH2O Static Pressure/1700 RPM Max/26 dBA/Rifle Bearing/No RGB/PWM)
- be quiet! Silent Wings Pro 4 140mm PWM (140mm/78.8 CFM/2.42 mmH2O Static Pressure/1900 RPM Max/29.4 dBA/Fluid Dynamic Bearing/No RGB/PWM) vs EK-Loop Fan FPT 120 (120mm/74.55 CFM/3.36 mmH2O Static Pressure/2200 RPM Max/32 dBA/Fluid Dynamic Bearing/D-RGB/PWM)