be quiet! SILENT WINGS PRO 4 120mm PWM - BL098

be quiet! SILENT WINGS PRO 4 120mm PWM - BL098 is a 120 mm fan, aimed at more demanding configurations – both for cases and water cooling and radiators. The combination of a maximum 3000 RPM, up to 83.9 CFM airflow and 5.31 mmH2O pressure makes it suitable for dense radiators and dense mesh panels. At the same time, it is designed to remain practically inaudible at normal speeds, so you can chase low temperatures without constant humming. The black, clean design without RGB makes it easy to fit into any build.

What you get

This fan is created for scenarios where you need both high static pressure and stable airflow – for example, dense 240/360 mm radiators or cases with limited airflow. At up to 83.9 CFM and 5.31 mmH2O, it can push through filters, grilles, and radiator fins without choking. The Speed switch allows you to physically set a limit on the maximum RPM (medium / high / ultra-high), so you can control the balance between noise and cooling according to the situation – daily work, gaming, stress tests. The 6-pole motor and dynamic fluid bearing reduce vibrations and wear, which is critical if you think the fan will run for years. Add the separate mounting systems for case or radiator, and you get a very flexible solution for any scenarios.

• Size 120 x 120 x 25 mm – standard form factor that fits most cases, radiators, and CPU coolers.
• Speed 550–3000 RPM – wide range, allowing nearly silent operation at low speeds and aggressive cooling when needed.
• Airflow 83.9 CFM – solid airflow that helps effectively expel hot air from the case or blow across a radiator.
• Maximum pressure 5.31 mmH2O – high static pressure, optimized for dense radiators and filtered panels.
• Noise level 36.9 dBA (max) – at normal speeds, the fan is practically inaudible, but you have a reserve in case of extra cooling needs.
• Dynamic fluid bearing and 6-pole motor – less vibration, smoother operation, and longer life under 24/7 load.
• Built-in speed switch – hardware control over the maximum PWM speed: you choose between medium, high, and ultra-high modes according to your needs.
• Individual mounting systems – separate fasteners depending on whether you use it as a case fan or on a radiator, for better sealing and less vibration.
• 4-pin PWM connector – full control via the motherboard or fan controller for precise RPM curves.
• Color: black, no RGB – clean look, ideal for stealth builds and people who do not care about lighting.

Who it is suitable for

It is suitable if you are chasing serious cooling – a high-end gaming build, a powerful workstation, or a custom/ AIO water cooling setup with dense radiators. If you are looking for a fan only for a light office build with minimal noise and no need for high static pressure, its potential may be excessive for you. The lack of RGB also directs it more towards fans of simpler and visually “quiet” configurations.

The strongest point of this model is the combination of a high maximum – up to 3000 RPM, serious airflow and pressure – with the ability to tame it via speed switch and PWM, so that it works as quietly or aggressively as you need.