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A square 90mm case fan with 15 translucent blue blades, blue LED lighting, and a 25mm thick black frame

BGears

BGears b-PWM 90 Blue 90mm case fan 500-4000 RPM 88 CFM 39 dBA 2 Ball

SKU CH-K5YG-WRC1B MPN b-PWM 90 Blue

A 90 mm PWM case fan with 15 translucent blue blades, 500 to 4000 RPM speed range, 88 CFM airflow and 39 dBA noise using dual ball bearings

  • Fan size90 mm
  • Number of fans1 Fan
  • Fan controlNo Controller
  • Fan depth25 mm
  • Bearing design2 Ball
  • Rotational speed500 to 4,000 RPM +/- 10%
  • Wide speed range from 500 to 4000 RPM for flexible cooling
  • High airflow of 88 CFM moves heat quickly from the case
  • Low 39 dBA noise keeps the system quiet at load
  • Dual ball bearing rated for long life at high speeds
  • 15 translucent blue blades with PWM control and 4-pin connector

Compact 90 mm PWM case fan

The BGears b-PWM 90 Blue is a single 90 mm case fan built for systems that require a slim 25 mm profile. It uses a dual ball bearing rated for high speed operation and a 4 pin PWM connector that also fits 3 pin headers. Fifteen translucent blue blades and matching blue LEDs give a distinctive look while moving air through tight spaces.

Suited for small form factor builds

This fan suits builders working in compact cases or upgrading legacy chassis that only accept 90 mm mounts. The 500 to 4000 RPM range lets the motherboard balance airflow against noise automatically. Buyers who need higher static pressure for dense radiators or heatsinks should consider alternative designs.

88 CFM maximum airflow

At full speed the fan delivers 88 CFM while producing 39 dBA, a level that remains audible in quiet rooms. The 10 percent RPM tolerance means actual peak flow can vary slightly between units. If your thermal target demands more airflow than 88 CFM at 90 mm, this model will not meet it.

How it compares

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

Price $7.99
Cheaper than about 93% 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 Blue
Product typeCase Fan
Product colorBlue
Performance
Rotational speed500 to 4,000 RPM +/- 10%
Airflow rate88 CFM
Power
Power input connector3 / 4 Pin
Size & build
Fan size90 mm
Number of fans1 Fan
Fan depth25 mm
Bearing design2 Ball
Product dimensions90 × 90 × 25 mm
Shipping weight0.13 kg
Package size206 × 145 × 3 mm
Compatibility
Compatible withCase
Environment & compliance
Operating noise39 dBA
More details
Fan controlNo Controller

Other versions of this model

2 more in the same range

Questions about this item

Does my case have a 90 mm mounting area for this fan?

The fan measures 90.00 x 90.00 x 25.00 mm and includes four screws, so it fits any standard 90 mm case opening.

Will the 4-pin PWM connector work with my older 3-pin motherboard header?

Yes, the fan ships with a 3-to-4-pin Molex adapter and can also plug directly into a standard mini 3-pin header.

How can I confirm the fan is running within its 500 to 4000 RPM range after installation?

Check the RPM reading in BIOS or monitoring software; it should stay between 500 and 4000 RPM with a tolerance of ±10 %.

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