Antec ATOM B550 550W 80 Plus Bronze Power SupplyThe Antec ATOM B550 is a 550-watt 80 Plus Bronze Certified power supply unit that comes with a 24-pin connector (520mm in length), an 8-pin connector for EPS12V (4+4-pin) (550mm in length), two 8-pin connectors for PCI-E (6+2-pin) (550mm in length), fi..