EVGA SuperNOVA 850 B2 Bronze Power Supply. Input Voltage: 115-240VAC, Input Frequency Range: 50-60Hz. Features: Highest quality Japanese brand capacitors ensure long-term reliability NVIDIA SLI Ready Double Ball Bearing fan for exceptional reliability and quiet operation Heavy-duty protections, including OVP (Over Voltage Protection), UVP (Under Voltage Protection), OCP (Over Current Protection), OPP (Over Power Protection), and SCP (Short Circuit Protection) Unbeatable 5 Year Warranty and unparalleled EVGA Customer Support 80 PLUS Bronze certified, with up to 85% efficiency under typical loads