Chieftec BDF-650C power supply unit 650 W 20+4 pin ATX PS/2 BlackWith the PROTON Series, CHIEFTEC advances into the new age DC to DC power supply technology. The series allows for energy conservation, as well as a much higher efficiency and power stability, which in turn ensures a higher longevity of installed components. The efficiency of the PROTON Series is certified at 80 PLUS BRONZE thereby fulfilling all ENERGY STAR 5,0 and higher requirements as stipulated by the EU. Chieftec BDF 650C. Total power: 650 W, AC