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White 120mm case fan with nine blades and smooth frame

be quiet!

be quiet! BL115 Silent Wings 4 120mm PWM 2500 RPM White case fan

SKU CH-9FPW-00HHC MPN BL115

A 120 mm PWM case fan with fluid-dynamic bearing spins up to 2500 RPM, delivering 75-80 CFM airflow at 31.2 dBA and rated for 300000 hours

  • Fan Counts1 Fan
  • TypeCase Fan
  • Fan Size120mm
  • Bearing TypeFluid Dynamic Bearing
  • RPM2500 RPM
  • Air Flow75-80 CFM

Option 120mm PWM high-speed

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Color White

  • High static pressure from funnel frame and tight tip clearance
  • Quiet 31.2 dBA at full 2500 RPM speed
  • Strong 75-80 CFM airflow for radiators and heatsinks
  • Smooth, low-vibration running via 6-pole motor and fluid-dynamic bearing
  • Flexible mounting with anti-vibration push pins and screw option

120mm PWM high-speed case fan

The be quiet! Silent Wings 4 BL115 is a single 120mm case fan built for users who want strong airflow with very low noise. Its fluid-dynamic bearing and 6-pole motor deliver smooth operation at speeds up to 2500 RPM. The all-white, non-LED design suits clean, light-themed builds.

Fits standard 120mm mounts

The fan uses a standard 4-pin PWM connector for automatic speed control via motherboard headers. Anti-vibration mounts are included for both push-pin and screwed installation, reducing resonance transfer to the chassis. The funnel-shaped frame outlets and minimal tip clearance make it effective on radiators and dense heat sinks where static pressure matters.

Delivers 75-80 CFM at 31.2 dBA maximum noise

At full speed the fan moves 75 to 80 CFM while peaking at 31.2 dBA, leaving headroom for quiet operation under typical loads. The design targets high static pressure, so it handles restrictive radiators and heatsink fins comfortably. It is not suited for builds needing RGB illumination or airflow above 80 CFM.

商品特色

  • High static pressure from funnel frame and tight tip clearance
  • Quiet 31.2 dBA at full 2500 RPM speed
  • Strong 75-80 CFM airflow for radiators and heatsinks
  • Smooth, low-vibration running via 6-pole motor and fluid-dynamic bearing
  • Flexible mounting with anti-vibration push pins and screw option

商品規格

Brandbe quiet!
Fan Counts1 Fan
TypeCase Fan
Fan Size120mm
Bearing TypeFluid Dynamic Bearing
RPM2500 RPM
Air Flow75-80 CFM
Noise Level31.2 dBA at max RPM
Power Connector4-pin PWM
ColorWhite
LEDNon-LED
出貨重量0.45 kg
包裝尺寸203 × 140 × 38 mm

其他版本

同系列還有 5 款

同系列產品，記憶體、散熱器或時脈不同 — 下單前請先比較。

商品問答

At what point does the 2500 RPM motor hit its airflow ceiling under sustained load?

The fan delivers 75-80 CFM at its maximum 2500 RPM, so sustained airflow tops out in that range.

How loud and hot does the fluid-dynamic bearing get when the fan runs at 2500 RPM all day?

Noise is rated at 31.2 dBA at max speed; the 6-pole motor and fluid-dynamic bearing are designed for low vibration and smooth long-term operation.

What motherboard header must I already have to control this 4-pin PWM fan?

A standard 4-pin PWM header is required for speed control and monitoring.

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