ACTIVE POWER FACTOR CORRECTION
A power supply unit works by taking power directly from the wall or other fixed power source, converting it to the correct output required by the connected components, and then distributing that power to said components. If any part of this process is interrupted or executed poorly, the connected components and the PSU itself could be damaged. Active PFC uses a circuit to correct power factor leading to reduced total harmonics, corrected AC input voltage, and increased overall efficiency output.