Cooler Master SickleFlow 80 V2 MFX-B8NN-25NPK-R1 80mm case fan

Compact 80 mm PWM fan for tight builds

This 80 mm case fan fits small-form-factor chassis and low-profile air coolers where a 120 mm unit will not mount. The 4-pin PWM connector lets the motherboard regulate speed automatically, so the fan runs only as fast as the thermal load demands. Its all-black, non-LED frame keeps the interior looking clean without added lighting.

Replaces noisy stock 80 mm fans when silence matters

Stock sleeve-bearing fans often whine above 1 000 RPM; this rifle-bearing model stays at 6 dBA at the 650 RPM floor and reaches 25 dBA at the 2 500 RPM ceiling. The jump is worth it when a build lives on a desk or in a media centre and the owner wants measurable airflow — 30 CFM — without an audible turbine. Builders who need more than 30 CFM or a larger mounting pattern should look elsewhere.

Mounts directly to 80 mm screw holes on cases

The 25 mm thick square frame aligns with standard 80 mm mounting points, so no adapter brackets are required. The reinforced ribbed frame reduces turbulent noise, while the two-tier sealed bearing resists dust ingress and oil loss for longer service life. A 4-pin PWM header on the motherboard is the only external connection needed.