We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Black 120mm PWM case fan with 25mm frame and all-black finish

be quiet!

be quiet! BL098 Silent Wings Pro 4 120mm PWM case fan

SKU CH-N8B8-77AGX MPN BL098

120 mm PWM case fan with fluid-dynamic bearing, three selectable speed profiles up to 3 000 rpm and 83-142 CFM airflow at 35-40 dBA

  • Fan Counts1 Fan
  • Fan ControllerNo Controller
  • TypeCase Fan
  • CompatibilityCase
  • Fan Size120mm
  • Fan Thickness25mm

Option 120mm PWM

Struck-through versions exist but are not stocked here.

Color Black

  • Black
  • White

Struck-through versions exist but are not stocked here.

  • Optimised blades deliver highest performance on radiators and heat sinks
  • Speed switch selects 1,600, 2,500 or 3,000 rpm maximum PWM speed
  • Small tip clearance plus funnel-shaped frame creates extremely high air pressure
  • 6-pole motor with fluid-dynamic bearing reduces vibration and power consumption
  • Separate mounting kits included for case or radiator installation

Silent Wings Pro 4 120mm PWM

The be quiet! BL098 is a 120mm PWM case fan built for system builders who want strong airflow with low acoustic output. It suits radiator, heatsink or chassis intake and exhaust positions where static pressure matters.

Fluid-dynamic bearing and 4-pin PWM control

The fan mounts in standard 120mm locations using the included hardware for either case or radiator installation. A three-position speed switch on the frame lets the builder cap the maximum PWM curve at 1600, 2500 or 3000 rpm without software. The 4-pin connector provides motherboard speed regulation and monitoring, while the fluid-dynamic bearing reduces friction for smooth long-term operation.

35-40 dBA at 83-142 CFM with 6-pole motor

At regular speeds the fan runs virtually inaudible, reaching 35 to 40 dBA across its operating range while moving 83 to 142 CFM. The 6-pole motor cuts vibration and power draw, and the funnel-shaped frame with small tip clearance focuses airflow for high static pressure on dense fin stacks.

Highlights

  • Optimised blades deliver highest performance on radiators and heat sinks
  • Speed switch selects 1,600, 2,500 or 3,000 rpm maximum PWM speed
  • Small tip clearance plus funnel-shaped frame creates extremely high air pressure
  • 6-pole motor with fluid-dynamic bearing reduces vibration and power consumption
  • Separate mounting kits included for case or radiator installation

Specifications

Brandbe quiet!
SeriesSILENT WINGS PRO 4
Model120mm PWM
Fan Counts1 Fan
Fan ControllerNo Controller
TypeCase Fan
CompatibilityCase
Fan Size120mm
Fan Thickness25mm
Bearing TypeFluid Dynamic
RPM3000-3499 RPM
Air Flow83-142 CFM
Noise Level35 - 40 dBA
Power Connector4 Pin
ColorBlack
Shipping weight0.41 kg
Package size193 × 146 × 32 mm

Other versions of this model

1 more in the same range

Same family, different memory, cooler or clock — compare before you commit.

Questions about this item

At what airflow does the 120 mm PWM fan hit its 35–40 dBA noise ceiling?

The fan reaches 35–40 dBA while delivering 83–142 CFM across its speed range.

How much power does the 4-pin PWM connector draw when the fan runs at 3 000 rpm all day?

The 6-pole motor keeps vibration and power consumption low even at the 3 000 rpm ultra-high setting.

What mounting hardware must already be in the case for the included radiator brackets to work?

Standard 120 mm case-fan holes or radiator screw patterns accept the supplied mounting systems.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.