Thermaltake SMART Series SP-550PCBUS 550W ATX 12V 2.3 SLI Ready CrossFire Ready 80 PLUS BRONZE Certified Active PFC Power Supply Fans: 1 Main Connector: 24Pin +12V Rails: Single PCI-Express Connector: 2 x 6+2-Pin SATA Power Connector: 6 Over Voltage Protection: Yes Input Voltage: 100 - 240 V Input Frequency Range: 47 - 63 Hz