- The CORSAIR 140 mm fan is perfect for high-end setups, thanks to its 1700 rpm speed- It's PWM controlled, so it'll adjust the speed based on the temperature of your hardware - AirGuide technology creates a concentrated airflow that's easy to direct at the hottest components - The super-quiet magnetic dome bearing ­keeps the friction and noise to a minimum- Zero RPM mode keeps the fans silent during low-load conditions for a noise-free experience