By adopting digital pulse-width modulation (PWM), the ASRock motherboard can provide CPU Vcore voltage more efficiently & smoothly. Compared to analog PWM, digital PWM can optimize the CPU power solution & provide a proper & stable Vcore for the processor. Greater air flow, faster heat dissipation! ASRock X-fan allows the motherboard to breathe smoothly. It will be automatically activated only when the system rises to a certain temperature under heavy-loading. Normally, ASRock X-fan will remain deactivated to give users the quietest computing experience.