be quiet! Silent Wings Pro 4 120mm PWM High-Speed Gaming PC Case Fan
- 120mm PWM 4-pin fan, 12 volts
- 3000 rpm maximum speed
- 83.9 cfm airflow
- 36.9 db noise level
- 6-pole motor, fluid dynamic bearing
- 3 watts
- Non-RGB, black
- 310 g
Last refreshed Oct 2, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A high-speed PWM case fan with a six-pole motor and a fluid dynamic bearing, made for airflow in a gaming PC case. The listing gives no static pressure figure, and its compatible devices field is over-broad.
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ASIN: B0B746VB2FModel: BL098Category: Case Fans
Overview
Cooling a PC case with a PWM-controlled fan, this black unit uses a six-pole motor and a fluid dynamic bearing to move air quietly at low speeds and strongly at the top speed. It has no lighting.
Choose it for a plain, unlit fan that can ramp to high airflow when the case needs it. The limit is that the listing gives no static pressure rating, the compatible devices field lists laptops and servers, and the copper material field is odd.
Who it's for
A builder replacing case fans with a clean, unlit look will use the PWM range and the bearing. Buyers who want RGB, or who need proof of performance on a radiator or dust filter, should look elsewhere.
Pros and cons
- High airflow at top speed
- PWM speed control
- Fluid dynamic bearing
- Low vibration design
- No static pressure figure
- Compatibility field is over-broad
- Material field says copper
Performance notes
A PWM signal lets the motherboard vary speed, so the fan can idle quietly and ramp up under load. Airflow rises with speed, and so does noise, which is why the stated noise level and the top speed belong together. A fluid dynamic bearing and a low vibration design limit mechanical hum.
Where it stands among case fans
- #9 most-searched brand and model of the 17 case fans lines we track (by search demand, not sales).
From the specs of the 15 case fans we list; not a test result.
Specifications
| Brand | be quiet! |
|---|---|
| Model | BL098 |
| Dimensions & fit | |
| Item dimensions L x W x H | 4.72"L x 4.13"W x 4.72"H |
| Item weight | 310 g |
| Capacity & performance | |
| Air flow capacity | 83.9 cfm |
| Maximum rotational speed | 3000 rpm |
| Noise level | 36.9 db |
| Wattage | 3 watts |
| Power & efficiency | |
| Power connector type | 4-Pin |
| Voltage | 12 volts |
| Compatibility & installation | |
| Compatible devices | Desktop, Laptop, Server, Graphic Cards, Electronic Enclosures, Other Cooling Systems |
| Warranty & support | |
| Warranty | 1 year |
| Other details | |
| Set name | PWM Pro Version |
| Features | Non-RGB 12V Computer Fan, 6-Pole Motor, Fluid Dynamic Bearing, Low Vibration, High Airflow |
Frequently asked questions
Does the be quiet! Silent Wings Pro 4 work in a laptop?
The compatible devices field lists desktop, laptop and server, but a fan with a 4-pin connector is made for a desktop case or cooler. Check the available space first.
What connector does the Silent Wings Pro 4 use?
A 4-Pin connector at 12 volts, with PWM speed control.
Does the Silent Wings Pro 4 have RGB lighting?
No. The highlights call it a Non-RGB 12V computer fan.