Corsair CV Series, CV650, 650 Watt

80 PLUS Bronze certified efficiency provides up to 88% operational efficiency, generating less heat and lowering your energy costs. CORSAIR CV Series power supplies are guaranteed to deliver their full rated wattage of continuous power. A 120mm thermally controlled low-noise cooling fan only spins at high speed when your power supply is under heavy stress, slowing down for quieter operationat lower loads.