The Arctic F8 PWM forwards the PWM signal from the CPU to the whole case ventilation system. With ARCTIC F PWM fan, your entire system delivers the superb performance while being cooled quietly. With the standard 25mm frame, this can be applied as intake or exhaust system fan. Thanks to fluid dynamic bearing and the patented fan holder design, this is not only quiet, but also highly durable. Via the PWM signal, the CPU fan is controlled by the mainboard to reach the ideal temperature for the CPU. The exclusive PST (PWM Sharing Technology) is forwarding the PWM signal to all other fans inside the system. This way, all fans are spinning at the same speed. This provides silent operation in idle mode, but also gives sufficient performance, when required to offer efficient cooling.