be quiet!
be quiet! Silent Wings Pro 4 140mm PWM High Speed 2400 RPM Premium Low Noise Cooling Fan | 4-Pin | BL099
*Price sourced from Amazon.com. Last updated 2026-06-06. Price and availability subject to change.
Bottom line: The be quiet! Silent Wings Pro 4 140mm PWM High Speed 2400 RPM Premium Low Noise Cooling Fan | 4-Pin | BL099 is a category leader on buyer feedback in the power supplies category, priced around $29.90, rated 4.7★ across 2,628 verified Amazon reviews. A confident buy for most shoppers in this category.
SpecPicks Verdict
SpecPicks classifies be quiet! Silent Wings Pro 4 140mm PWM High Speed 2400 RPM Premium… as a category leader on buyer feedback in the power supplies category, based on 2,628 verified Amazon reviews and our ranking model that weights rating × review-volume × price-fit. be quiet!'s positioning sits comfortably above the category median. Use the Compare tool to put it side-by-side with two or three close alternatives before clicking through to Amazon.
Common buyer scenarios for power supplies 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 Amazon listing before purchase. Prices, stock, and Prime eligibility update directly from Amazon's catalog and may have moved since this page was last verified.
Pros & Cons
Pros
- ✓ Highly rated — 4.7★ average across customer reviews
- ✓ Large, well-vetted feedback pool (2,628 reviews)
- ✓ Optimized fan blades for the highest performance on radiators and heat sinks
- ✓ Backed by be quiet!'s warranty and support channels
- ✓ Ships via Amazon with Prime eligibility and the standard returns policy
Cons
- ✗ Confirm socket / form-factor / power-rating compatibility against your build before ordering
- ✗ Price, stock, and Prime eligibility update from Amazon and may have changed since this page was last verified
Key Features
- Optimized fan blades for the highest performance on radiators and heat sinks
- Speed switch allows changing maximum PWM speed between medium-speed, high-speed and ultra-high-speed (up to 2400 rpm)
- Small tip clearance and a fan frame with a funnel-shaped air outlet for extremely high air pressure
- Virtually inaudible operation at regular speed
- 6-pole fan motor and fluid-dynamic bearing for less vibration and very smooth operations
Full Specifications
| Brand | be quiet! |
|---|---|
| Model | BL099 |
| Voltage | 12 Volts |
| Wattage | 3.04 watts |
| Material | Copper |
| Set Name | PWM Pro Version |
| Unit Count | 1.0 Count |
| Noise Level | 36.8 Decibels |
| Part Number | BL099 |
| Compatibility | Switch |
| Material Type | Copper |
| Cooling Method | Fan |
| Number of Items | 1 |
| Vibration/Rumble | Yes |
Ready to buy?
be quiet! Silent Wings Pro 4 140mm PWM High Speed 2400 RPM Premium Low Noise Cooling Fan | 4-Pin | BL099 is available on Amazon with Prime shipping and the full Amazon returns policy. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.
*Price sourced from Amazon.com. Last updated 2026-06-06. Price and availability subject to change.
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