EVGA SuperNOVA 650W G1 80Plus Gold Power Supply Unit (120-G1-0650-XR) - 120 V AC, 230 V AC Input Voltage - 3.3 V DC, 5 V DC, 12 V DC, -12 V DC, 5 V DC Output Voltage - 1 Fans - Internal - Modular - ATI CrossFire Supported - NVIDIA SLI Supported - 90% Efficiency - 650 W