Corsair ML140 PRO LED CO-9050047-WW 140mm case fan RED

140 mm magnetic-levitation PWM fan

This 140 mm case fan uses magnetic-levitation bearings and a custom rotor to balance static pressure with airflow. A single four-pin PWM connector allows motherboard speed control from 400 to 2,000 RPM. Red LEDs provide illumination while the fan moves 20 to 97 CFM at 16 to 37 dBA. The 25 mm thick frame fits standard mounting points.

Builders who need quiet, adjustable cooling

The wide speed range suits systems that run silent at idle and ramp up under load, while the magnetic bearing reduces wear for long-term reliability. Users who require a bundled fan controller or multi-colour lighting should look at other models, as this unit includes neither a controller nor RGB LEDs. Builders with tight clearances under 25 mm will need a slimmer alternative.

Sustained-load acoustic and thermal behaviour

Under continuous load the fan can maintain its upper RPM limit, delivering 97 CFM while noise settles at the rated 37 dBA. Magnetic levitation eliminates physical contact, so bearing noise does not increase over time and performance remains consistent during extended sessions. The PWM curve lets the motherboard hold a steady speed rather than cycling, keeping temperatures stable without sudden acoustic spikes.