EVGA Supernova 850 GS, 80+ Gold 850W, Fully Modular, EVGA ECO Mode, 7 Year Warranty, Includes Free Power On Self Tester Power Supply 220-GS-0850-V1 EVGA 850 GS - "Silence is Golden" 80 PLUS Gold certified, with 90% (115VAC) / 92% (220VAC~240VAC) efficiency or higher under typical loads Fan Size / Bearing: 135mm Teflon Nano-Steal Bearing 7 Year Warranty and unparalleled EVGA Customer Support 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)