CORSAIR CV Series 750 Watt 80 Plus Bronze ATX Power Supply80 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 operation at lower loads. Compact 125mm long casing ensures an easy fit