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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 size120 mm
  • Number of fans1 Fan
  • Fan controlNo Controller
  • Fan depth25 mm
  • Bearing designFluid Dynamic
  • Rotational speed3000-3,499 RPM

Model 120mm PWM

Color Black

  • 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.

How it compares

Measured against everything we stock in PC Cooling Fans, at today’s prices. Recalculated every night.

Price $23.99
Pricier than about 60% of the 8,339 comparable items (median $19.99).
Fan size 120 mm
Typical for this category: the median of 1,114 items is 120 mm.

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Specifications

Product
Brand namebe quiet!
Product lineSILENT WINGS PRO 4
Model name120 mm PWM
Product typeCase Fan
Product colorBlack
Performance
Rotational speed3000-3,499 RPM
Airflow rate83-142 CFM
Power
Power input connector4 Pin
Size & build
Fan size120 mm
Number of fans1 Fan
Fan depth25 mm
Bearing designFluid Dynamic
Shipping weight0.41 kg
Package size193 × 146 × 32 mm
Compatibility
Compatible withCase
Environment & compliance
Operating noise35–40 dBA
More details
Fan controlNo Controller

Other versions of this model

3 more in the same range

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.

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