The case ventilation in important, the components are the key. The ARCTIC F12 PWM PST sends the PWM signal to the entire ventilation system. All fans in the system work equally quietly and yet sufficiently strong. This has a standard frame with a width of 25mm. It can be mounted to both work as push and pull configuration. Thanks to the fluid dynamic bearing, this fans are not only very quiet while in operation, but also very durable. The PWM signal controls the fan from the motherboard to achieve the ideal temperature for the case. The PST(PWM Sharing Technology) forwards the PWM signal to all fans in the system.