CORSAIR CX550 80 PLUS Bronze Non Modular Low-Noise ATX 550 Watt Power Supply - UK - Black80 PLUS Bronze Certified: Provides up to 88% operational efficiency, generating less heat and lowering your energy costs. Full Continuous Power: CORSAIR CX Series power supplies are guaranteed to deliver their full rated wattage of continuous power. Low Noise Cooling: 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