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Black 90 mm square case fan, 38 mm thick, three-pin connector, no LED

BGears

BGears b-Blaster 90x38 90 mm 38 mm 4500 RPM 108 CFM 3-pin case fan

SKU CH-KG4N-2PVM4 MPN b-Blaster 90x38

Thick 90 mm case fan spins at 4500 RPM, pushing 108 CFM through cases or CPU coolers via a 3-pin connector

  • Fan size90 mm
  • Number of fans1 Fan
  • Fan controlNo Controller
  • Fan depth38 mm
  • Bearing design2 Ball
  • Rotational speed4,500 RPM
  • Extended life with 2 ball bearing design
  • High airflow of 108 CFM at 4500 RPM
  • Fits cases and CPU coolers with 90 mm size
  • Speed monitoring via 3 pin connector signal
  • Ready to install with four included screws

90 mm 38 mm high-speed case fan

The BGears b-Blaster 90x38 is a 90 mm square, 38 mm thick case fan built for extreme airflow. It spins at 4500 RPM and delivers 108 CFM through a dual ball-bearing motor. The 3-pin connector supplies 12 VDC power and a speed signal. Mounting screws are included.

Suits compact cases and CPU heatsinks needing

Builders who prioritise raw cooling capacity over quiet operation will benefit from the high static pressure. The 45 dBA noise level makes it unsuitable for silent or noise-sensitive builds. Systems without 3-pin headers or with strict acoustic targets should look elsewhere.

108 CFM at 4500 RPM with 38 mm depth

This airflow rating handles dense heatsink fins and restricted chassis vents comfortably. The 38 mm thickness provides extra motor torque for sustained high speed. Headroom diminishes when the fan is voltage-reduced for quietness, as both flow and pressure drop sharply below rated RPM.

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
Product lineBlaster Series
Model nameb-Blaster 90 × 38
Product typeCase Fan
Product colorBlack
Performance
Rotational speed4,500 RPM
Airflow rate108 CFM
Power
Power input connector3 Pin
Size & build
Fan size90 mm
Number of fans1 Fan
Fan depth38 mm
Bearing design2 Ball
Product dimensions90 × 90 × 38 mm
Shipping weight0.16 kg
Package size179 × 132 × 47 mm
Compatibility
Compatible withCase, CPU
In the box
In the boxFan and 4 screws
Environment & compliance
Operating noise45 dbA
More details
Fan controlNo Controller
LED lightingNon-LED

Questions about this item

Does my case have a 90 mm mounting pattern to fit this 90.00 x 90.00 mm frame?

The fan measures 90.00 x 90.00 x 38.00 mm, so your case or heatsink must provide four mounting holes on a 90 mm square with enough depth for the 38 mm thickness.

Will the 3-pin connector let my older motherboard header report the 4500 RPM speed signal?

Yes, the 3-pin lead includes a tachometer wire so a compatible 3-pin header can read the 4500 RPM signal, though voltage control — not PWM — will set the actual speed.

After installation, how can I confirm the fan is delivering the rated 108 CFM airflow?

With the fan running at full 12 V you should hear a noticeable 45 dBA rush of air; checking the BIOS or monitoring software for a steady 4500 RPM reading confirms the motor is spinning at spec.

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