BitFenix 80 Plus Gold Full Modular 550W PSU , BWG550M Fans: 1 x 135mm FDB fan Main Connector: 20+4Pin PCI-Express Connector: 2 x 6+2-Pin SATA Power Connector: 8 Efficiency: 92% Over Voltage Protection: Yes Input Voltage: 100 - 240 V Input Frequency Range: 47 - 63 Hz