Power supply unit power 550 watt serial ata connections 2 cooling system active max fans 1 special feature auto fan control motherboard power connectors atx12v 204 pins floppy 1 peripheral connectors 4 pin 4 current strengths 3 3v 25 a 5v 28 a 12v1 18 a 12v 0 8 a 5vsb 2 a