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Black 90mm square case fan, translucent blades, 4-pin connector

BGears

BGears b-PWM 90 Black 90mm case fan 4000 RPM 88CFM 2 Ball

SKU CH-F1X7-BKXYE MPN b-PWM 90 Black

90mm PWM case fan delivering up to 88CFM airflow at 4000RPM with dual ball bearings and 15 translucent blades

  • Fan size90 mm
  • Number of fans1 Fan
  • Fan controlNo Controller
  • Fan depth25 mm
  • Bearing design2 Ball
  • Rotational speed4,000 RPM
  • High airflow up to 88CFM for demanding cooling
  • 2 ball bearing built for high-speed durability
  • PWM control from 500 to 4000 RPM for quiet or maximum performance
  • 15 aerodynamic blades optimise airflow and stability
  • 4-pin connector with 3-to-4-pin adapter for broad compatibility

Compact 90mm PWM case fan

The BGears b-PWM 90 Black is a single 90mm case fan built for systems that need focused airflow in tight spaces. It uses a 4-pin PWM connector so the motherboard can vary speed automatically from 500 to 4000 RPM. The dual ball bearing is rated for sustained high-speed operation. Fifteen translucent black blades move up to 88 CFM at a listed 39 dBA.

Builders with restricted mounting points

This fan suits small-form-factor cases or side-panel mounts where only a 90mm frame fits and strong static pressure is required. The included 3-to-4-pin Molex adapter lets it run from a PSU when a PWM header is absent. Buyers needing RGB lighting or larger 120mm and 140mm frame sizes should look at other models in the same series.

4000 RPM peak speed with dual ball bearing

The 4000 RPM ceiling and 2-ball bearing combine to deliver the highest airflow this 90mm frame can produce. PWM control keeps noise low at idle while the bearing tolerates continuous maximum speed. If your thermal target can be met at lower RPM, a quieter sleeve-bearing alternative may be preferable.

How it compares

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

Price $11.99
Cheaper than about 85% of the 8,339 comparable items (median $19.99).
Fan size 90 mm
Lower than about 70% of the 1,114 comparable items (median 120 mm).

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Specifications

Product
Brand nameBgears
Model nameb-PWM 90 Black
Product typeCase Fan
Product colorBlack
Performance
Rotational speed4,000 RPM
Airflow rateup to 88CFM
Power
Power input connector4 Pin
Size & build
Fan size90 mm
Number of fans1 Fan
Fan depth25 mm
Bearing design2 Ball
Shipping weight0.13 kg
Package size203 × 141 × 39 mm
Compatibility
Compatible withCase
More details
Fan controlNo Controller

Other versions of this model

2 more in the same range

Questions about this item

How long will the 2 ball bearing last before it needs replacement?

The 2 ball bearing is designed for high speed high performance and typically outlasts sleeve bearings, though exact lifespan depends on operating conditions and duty cycle.

At 4000 RPM and 88 CFM, what limit appears first during continuous operation?

The 39 dBA noise level at maximum speed becomes the practical ceiling before thermal or mechanical limits are reached under sustained load.

What noise, heat and power draw should I expect when this 90 mm fan runs all day at full PWM?

At 4000 RPM it produces 39 dBA; PWM control lets it drop to 500 RPM for quieter idle, and the 4 pin connector draws only the current needed for the selected speed.

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