be quiet! Silent Wings Pro 4 120mm PWM Fan BL098
be quiet!
be quiet! Silent Wings Pro 4 120mm PWM Fan BL098
The be quiet! Silent Wings Pro 4 120mm PWM Fan is a high-performance case and radiator fan built for systems that demand both cooling power and quiet operation. It suits PC builders and overclockers who need excellent air pressure on radiators or heat sinks without excess noise. A speed switch lets you choose between medium, high, and ultra-high-speed operation to match your workload.
Why this product
Three selectable speed modes
A physical speed switch lets you change maximum RPM between medium, high, and ultra-high-speed (up to 3000 rpm) without software, so you can match cooling to your workload.
High air pressure for radiators
Small blade-to-frame clearance and a funnel-shaped outlet produce 5.31 mm H₂O of pressure, enough to push air through dense radiator fins.
Quiet at full speed
A 6-pole motor with advanced fluid-dynamic bearing keeps noise to 36.9 dB(A) even at 3000 rpm, and virtually silent in mid-speed operation.
Long bearing life
The fluid-dynamic bearing is rated for up to 300,000 hours of operation while reducing vibration.
Multiple mounting solutions included
Three mounting types come in the box: radiator corners, anti-vibration mounts for cases, and plastic standoffs.
- Size120 × 120 × 25 mm
- Maximum speed3000 rpm
- Air pressure @ 100% PWM5.31 mm H₂O
- Noise @ 100% PWM36.9 dB(A)
- Connector4-pin PWM
- Bearing typeFluid-dynamic (FDB)
- DesignBlack
- SKUBEQ-6658
- EAN4260052188903
- Fits any 120 mm case fan or radiator mount with standard holes.
- 4-pin PWM connector works with any motherboard PWM header or fan controller that supports PWM speed adjustment.
- Radiator-optimized design excels on water cooling radiators, though also suitable for CPU heatsinks and case airflow.
- Speed switch sets maximum PWM speed; actual speed still responds to PWM signal from your controller or motherboard, so full 3000 rpm is available only if the controller allows 100% PWM.
Best for
- Radiator cooling in custom water loops
- High-end PC builds where cooling performance and quiet operation both matter
- Systems with dense radiators or restrictive heatsinks that need pressure
- Builders who want flexible speed control without software
Trade-offs
- Budget builds — the price reflects its engineering and performance; cheaper alternatives exist for basic cooling.
- Airflow-focused case fans — while capable, this fan prioritizes pressure for radiators; high-airflow designs move more air in open spaces.
- Passive or fanless systems — it is an active cooler and requires 12V power and PWM control.
Silent Wings Pro 4 120mm PWM is the most progressive, performant and versatile fan by be quiet!
The fan blades are what makes a fan. It is for this reason that the fan blades of Silent Wings Pro 4 120mm PWM have been developed newly from scratch. The new blade arrangement enables a performance second to none for all possible operations. Be it in a case, on radiators or heat sinks.
Silent Wings Pro 4 120mm PWM makes for extraordinary air pressure and therefore, significantly increases the system's performance. The decreased distance between the fan blades and the frame enables an extraordinarily high air pressure. By that, the Silent Wings Pro 4 120mm PWM allows the user to run even the most demanding applications.
The speed switch makes switching between medium, high-speed and ultra-high-speed of maximum RPM levels quick and easy. The Silent Wings Pro 4 120mm PWM alters its application with a simple slide to the right. Medium-speed is suitable for any operation that requires regular cooling performance. High-speed lets the fan spin faster, providing more cooling power. Ultra-high-speed ultimately offers enough rpm to cool even the most demanding hardware in high-end PC builds.
Silent Wings Pro 4 120mm PWM has 3 mounting options in the scope of delivery. The pre-installed radiator corners are specially designed for radiators on which the incomparable performance of this high-end fan completely shines. On the other hand, for chassis use, the anti-vibration mounting is the first choice as they reduce vibrations to a minimum. The plastic mountings round up the scope.
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 Pro 4 120mm PWM.
6-pole fan motor with 3 phases for very low power consumption, less vibration and therefore quiet max. operation of 36.9dB(A). Equipped with this state-of-the-art technology the fan is virtually inaudible when operated in mid-speed.
The all-black design combined with a high-grade fan sticker makes Silent Wings Pro 4 120mm PWM a highlight in any system.
Fan
| Brand | be quiet! |
|---|---|
| Model | Silent Wings Pro 4 120mm PWM |
| Part number | BL098 |
| Size | 120 × 120 × 25 mm |
| Color | Black |
| Weight | 0.227 kg |
Performance
| Maximum speed | 3000 rpm |
|---|---|
| Airflow @ 100% PWM | 142.5 m³/h (83.9 CFM) |
| Air pressure @ 100% PWM | 5.31 mm H₂O |
| Bearing technology | Fluid-dynamic (FDB) |
| Motor type | 6-pole, 3-phase |
| Bearing life | Up to 300,000 hours |
Acoustics & power
| Noise @ 100% PWM | 36.9 dB(A) |
|---|---|
| Voltage | 12V |
| Connector | 4-pin PWM |
| Cable length | 500 mm |
Included
| Mounting options | Radiator corners, anti-vibration mounts, plastic mountings |
|---|---|
| Speed switch | Medium, high, ultra-high-speed modes |
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.