The case ventilation system in lockstep, the CPU gives the beat. The ARCTIC F PWM is forwarding the PWM signal from the CPU to the whole case ventilation system. This way, the entire system is cooled quietly, but still offers the performance, when needed. With the standard 25mm frame, the ARCTIC F PWM can be applied as sucking and blowing system fan. Thanks to fluid dynamic bearing and the patented fan holder design, the ARCTIC F PWM is not only quiet, but also highly durable.