StarTech.com 550 Watt ATX12V 2.3 80 Plus Computer Power Supply with Active PFC ATX2PW550WH Reduce operation cost and energy consumption with an 80 Plus certified power supply Universal compatibility supporting EPS and ATX Intel/AMD motherboards 80 Plus Certified Active Power Factor Correction (A-PFC) Support for Intel and AMD Systems Complies with ATX 12V rev: 2.3 Complies with Intel EPS 12V rev: 2.8/2.92 Protection: Short Circuit Protection (SCP), Over Voltage Protection (OVP), Over Current Protection (OCP), Over Power Protection (OPP)