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Black 90mm square case fan with transparent blades and 3-pin connector

BGears

BGears b-Blaster 90 90mm 3500 RPM 78 CFM 39 dBA 3-pin case fan

SKU CH-4BPR-S3CMA MPN b-Blaster 90

90 mm dual-ball-bearing case fan spinning at 3500 RPM for 78 CFM airflow at 39 dBA with 3-pin connector and Molex adapter included

  • Fan size90 mm
  • Number of fans1 Fan
  • Fan controlNo Controller
  • Fan depth25 mm
  • Bearing design2 Ball
  • Rotational speed3,500 RPM
  • High airflow of 78 CFM at 3500 RPM
  • Low noise output of 39 dBA under load
  • Dual ball bearing design for extended lifespan
  • 90 mm frame fits standard case mounts
  • 3-pin connector with included Molex adapter

90mm high-speed case fan

The BGears b-Blaster 90 is a 90mm case fan built for high airflow in tight spaces. It spins at 3500 RPM to move up to 78 CFM while producing 39 dBA of noise. A dual ball-bearing design supports extended life and consistent performance. The 3-pin connector provides a speed signal to the motherboard.

Suits compact builds needing strong airflow

This fan fits 90mm mounts in cases, power supplies or CPU heatsinks where maximum air movement matters more than silence. The included 3-to-4-pin Molex adapter allows direct connection to a power supply. It is not suited for builders who require PWM control via a 4-pin header or mounts larger than 90mm.

3500 RPM airflow rating

At 3500 RPM the fan delivers its rated 78 CFM, which determines whether it can meet the cooling demand of a given component or chassis. The 39 dBA noise level at that speed is the trade-off to evaluate against acoustic targets.

How it compares

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

Price $10.99
Cheaper than about 90% 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-Blaster 90
Product typeCase Fan
Product colorBlack
Performance
Rotational speed3,500 RPM
Airflow rate78 CFM
Power
Power input connector3 Pin
Size & build
Fan size90 mm
Number of fans1 Fan
Fan depth25 mm
Bearing design2 Ball
Product dimensions90 × 90 × 25 mm
Shipping weight0.14 kg
Package size204 × 144 × 38 mm
Compatibility
Compatible withCase
Environment & compliance
Operating noise39 dBA
More details
Fan controlNo Controller

Questions about this item

How do I install the b-Blaster 90 in my case, and what step is often missed?

Mount the 90 mm frame with four screws, then plug the 3-pin header into the motherboard or use the included 3-to-4 pin Molex adapter for direct PSU power; the step often missed is connecting the third wire so the board can read the 3500 RPM speed signal.

What maintenance or replacement will this fan need over time?

The dual ball-bearing design is rated for extended life, but after years of continuous 3500 RPM operation the bearings can wear; expect to replace the whole 90 mm unit when noise rises above the specified 39 dBA or airflow drops below 78 CFM.

What limit appears first when the fan runs at full speed for long periods?

At the fixed 3500 RPM the motor hits its acoustic ceiling of 39 dBA before thermal throttling becomes an issue, so sustained noise is the first practical limit you will notice.

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