Power supply unit power 500 watt noise emission 301 db pci express connectors 8 pin 2 serial ata connections 6 cable management non modular mains voltage 200 240 volt mains frequency 50 60 hz efficiency 20 86 efficiency 50 87 efficiency 100 83 cooling system active max fans 1 fan diameter 120 mm rpms 2 100 rpm power factor correction active mtbf 100 000 hours motherboard power connectors atx12v 204 pins combined power