be quiet! Silent Wings 4 140mm PWM High-Speed Fan BL097
be quiet!
be quiet! Silent Wings 4 140mm PWM High-Speed Fan BL097
The be quiet! Silent Wings 4 140mm PWM High-Speed Fan is designed for users who need both quiet operation and high performance in demanding cooling applications. It combines low noise output with powerful airflow for case, radiator, and heat sink installations.
Why this product
Dual mounting options included
Comes with pre-installed anti-vibration mounting for cases and a plastic mounting option for radiators and heat sinks, reducing vibration-induced noise in either configuration.
High air pressure for demanding tasks
Small tip clearance and funnel-shaped frame outlets deliver 2.36 mmH2O of static pressure, enabling effective cooling even under sustained high loads.
Exceptionally long bearing life
Advanced fluid-dynamic bearing rated for 300,000 hours of operation—approximately 34.2 years—while reducing vibration for quieter sustained use.
Low maximum noise at full speed
Reaches only 29.3 dB(A) at maximum RPM, with quieter operation at mid-speed thanks to a 6-pole, 3-phase motor design.
- Size140mm
- Maximum Speed1900 RPM
- Maximum Airflow78.4 CFM / 133.2 m³/h
- Static Pressure2.36 mmH2O
- Noise Level (Max)29.3 dB(A)
- Bearing TypeFluid Dynamic Bearing (FDB)
- Rated Current400 mA
- SKUBEQ-940
- EAN4260052188897
- PWM speed control via 4-pin connector for automatic fan curve regulation on compatible motherboards and fan controllers.
- Fits 140mm fan mounting locations in PC cases, on water cooling radiators, and on large CPU or GPU heatsinks.
- Works with any radiator or heatsink that accepts a standard 140mm fan, regardless of brand.
Best for
- Water-cooled systems requiring high-performance radiator fans that remain audibly quiet even under load.
- Acoustically sensitive builds where case airflow must scale with CPU or GPU heat without introducing noticeable noise.
- Long-running server or workstation cooling where bearing longevity and minimal vibration matter.
- High-performance builds stacked with multiple radiators or demanding cooling configurations that need both static pressure and silent operation.
Trade-offs
- Extremely tight mounting spaces; at 25mm depth, it requires clearance typical of standard 140mm fans but may conflict with very shallow radiator designs.
- Setups requiring external voltage regulation; PWM control is native, but non-PWM fan headers cannot automate speed adjustment.
Silent Wings 4 140mm PWM high-speed combines all features of a virtually inaudible with an extremely performant fan for the most demanding applications.
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.
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.
Fan
| Brand | be quiet! |
|---|---|
| Model | BL097 |
| Size | 140mm |
| Depth | 25mm |
| Color | Black |
| Connector | 4-pin PWM |
| Mounting Options | 2 (anti-vibration mounting pre-installed; plastic mounting included) |
Performance
| Maximum Speed | 1900 RPM |
|---|---|
| Airflow (Max) | 78.4 CFM / 133.2 m³/h |
| Static Pressure (Max) | 2.36 mmH2O |
Acoustics & Power
| Motor Design | 6-pole, 3-phase |
|---|---|
| Noise Level (Max) | 29.3 dB(A) |
| Rated Current | 400 mA |
| Bearing Type | Fluid Dynamic Bearing (FDB) |
| Fan Life | 300,000 hours (approx. 34.2 years) |
Shipping
All our products are shipped from the United Kingdom within 24 to 48 hours of purchase. See our Shipping and Returns page for full details.
Returns
- Tech Syndicate offers a full money-back guarantee on all purchases made in our store. If you are not satisfied with your purchase, we will provide a full refund, no questions asked.
- Refunds are available within 45 days of delivery.
- After the 45-day period you are no longer eligible for a refund, so we encourage you to try the product within the first few weeks to make sure it fits your needs.