Power supply unit power 600 watt max power 650 watt certificates 80 plus bronze noise emission 251 db pci express connectors 8 pin 4 serial ata connections 6 cable management non modular mains voltage 100 240 volt mains frequency 50 60 hz efficiency 20 87 efficiency 50 91 efficiency 100 87 cooling system active max fans 1 fan diameter 120 mm rpms 1 360 rpm power factor correction active special features energy star 60