Power Factor Control (PFC) Cooling: 12cm Red Fan New Version ATX2.2/2.3 Silent with better ventilation ATX 12V compliant for most CPUs and... The ACE 750W PSU features a 120mm fan for quiet operation and ATX compliance, ensuring compatibility with most CPUs. It also includes Power Factor Control (PFC) and a new version ATX2.2/2.3 design for improved ventilation and silence.