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Square black 70mm frame 15mm thick three-pin case fan

BGears

BGears b-Blaster 70 70mm 15mm 4500 RPM 48 CFM 24 dBA 3-pin case fan

SKU CH-J1MS-8HD6M MPN b-Blaster 70

A 70 mm case fan with dual ball bearings spins at 4500 RPM to deliver 48 CFM airflow at 24 dBA noise

  • Fan size70 mm
  • Number of fans1 Fan
  • Fan controlNo Controller
  • Fan depth15 mm
  • Bearing design2 Ball
  • Rotational speed4,500 RPM
  • Extended lifespan from dual ball bearing design
  • High airflow of 48 CFM at 4500 RPM
  • Quiet operation at 24 dBA noise level
  • Standard 3-pin connector with speed signal
  • Compact 70mm by 15mm size fits tight spaces

Compact 70 mm case fan

The BGears b-Blaster 70 is a 70 mm by 15 mm case fan that spins at 4500 RPM and delivers 48 CFM of airflow at a rated 24 dBA. It uses a dual ball-bearing design and a standard three-pin connector with speed signal output. Four mounting screws are included for direct installation.

Upgrade from sleeve-bearing or slower 70 mm fans

This model replaces older 70 mm fans that use sleeve bearings or run at lower speeds, offering longer service life and higher static pressure for tight spaces. The jump is worth it when a chassis, power supply or CPU heatsink demands more airflow than a standard low-speed fan can provide.

Builders fitting 70 mm mounts in cases.

It suits anyone needing a high-speed 70 mm replacement with a three-pin header and ball-bearing reliability. Buyers who require PWM speed control, larger fan frames or lower noise levels should look at other options.

How it compares

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

Price $12.99
Cheaper than about 80% of the 8,339 comparable items (median $19.99).
Fan size 70 mm
Lower than about 80% of the 1,114 comparable items (median 120 mm).

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Specifications

Product
Brand nameBgears
Model nameb-Blaster 70
Product typeCase Fan
Performance
Rotational speed4,500 RPM
Airflow rate48 CFM
Power
Power input connector3 Pin
Size & build
Fan size70 mm
Number of fans1 Fan
Fan depth15 mm
Bearing design2 Ball
Product dimensions70 × 70 × 15 mm
Shipping weight0.05 kg
Package size112 × 99 × 18 mm
Environment & compliance
Operating noise24 dBA
More details
Fan controlNo Controller

Questions about this item

Will the 70 mm by 15 mm frame and four included screws fit a standard 70 mm case mount?

Yes — the fan measures 70.00 x 70.00 x 15.00 mm and ships with four mounting screws that match standard 70 mm hole spacing.

How do I connect the 3-pin lead so the motherboard reads the 4500 RPM speed signal?

Align the three-pin connector with the motherboard header tab, press it straight on, then enable fan monitoring in BIOS so the tachometer wire reports the 4500 RPM speed.

When should I expect to replace the 2 ball bearing fan that runs at 4500 RPM?

The dual ball bearing design is rated for extended life at 4500 RPM; plan replacement when noise rises above the specified 24 dBA or airflow drops below 48 CFM.

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