The Corsair CX550 550 Wattb PSU is a 80 Plus Bronze Certified efficient and is designed for little or no detectable fan noise during regular operation. The CX550 comes with MTBF hours of 100,000. The PSU supports ATX12V 2.4 and EPS12V 2.92 standards. Cooler Master MWE 450 Bronze V2 Power Supply – Non-Modular | 80 Plus Bronze Certified | 120mm HDB Fan | DC-to-DC Circuit Design | ATX 2.52 Version | 450 Watt