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

Compact 90mm PWM case fan

The BGears b-PWM 90 Red is a single 90mm case fan built for systems that need focused airflow in tight spaces. It uses a 2 ball bearing rated for high-speed operation and includes a 4-pin PWM connector with a 3-to-4-pin Molex adapter for flexible motherboard or controller connection. Fifteen translucent red blades and matching red LEDs give a distinct look inside the chassis. The fan measures 90.00 by 90.00 by 25.00 millimetres and is sold as a new unit.

Speed range defines cooling ceiling

The decisive specification is the 500 to 4000 RPM range with a ten percent tolerance, which pushes 88 CFM at the top end while producing 39 dBA of noise. That wide span lets the fan run near-silent at idle and ramp to maximum airflow when components demand it, but the peak output is fixed by those RPM and CFM figures. No controller is bundled, so speed curves depend entirely on the motherboard or external fan hub.

Suits small-form-factor builds needing high static

Builders fitting a 90mm mount in compact cases, HTPC enclosures or dense radiator stacks will benefit from the broad PWM range and durable bearing. Buyers who need larger frame sizes, lower maximum noise or bundled fan controllers should look elsewhere. The red LED illumination is fixed, so systems requiring a different colour theme or no lighting at all are not a match.