Fans: 1 Main Connector: 20+4Pin +12V Rails: Single PCI-Express Connector: 2 x 6-Pin, 2 x 6+2-Pin SATA Power Connector: 8 Efficiency: 50% Load (92% Efficiency),20% Load (90% Efficiency), 100% Load (89% Efficiency) Over Voltage Protection: Yes Overload Protection: Yes