CORSAIR CS550M 80+ Gold Semi Modular Power Supply (550W)

The Corsair CS550M is a 550-watt ATX power supply built for mainstream desktop builds where efficiency, quiet operation, and cable tidiness matter. Carrying the 80 Plus Gold certification, it converts mains power with high efficiency, which means less energy is wasted as heat and the internal 120 mm sleeve-bearing fan does not need to spin hard under typical loads, keeping acoustic output low. Cable management is simplified by the semi-modular design: the essential ATX and CPU cables are permanently attached, while the remaining peripheral cables are detachable, so you connect only what your build requires. All cables use a low-profile, all-black flat-sleeved construction that routes cleanly behind motherboard trays and contributes to a neat interior finish. The CS550M meets the ATX12V v2.4 specification and fully supports the low-power sleep states introduced on 4th-generation Intel Core processors, preventing compatibility problems that older power supplies can exhibit with modern CPU C-states. A single EPS12V connector covers the CPU power requirement, while two PCIe connectors serve a single discrete graphics card. Six SATA connectors accommodate multiple storage drives, and a peripheral Molex and one floppy adapter round out the connector set. Corsair rates the unit for continuous 550 W output at up to 40 °C ambient, a meaningful real-world condition for an enclosed PC case. Mean time between failures is rated at 100,000 hours, and the unit carries a 3-year warranty. Key Verified Specifications: – Continuous Power Output: 550 W – 80 Plus Rating: Gold – ATX12V Version: v2.4 – Form Factor: ATX – Modular Type: Semi-modular – Fan Size: 120 mm (sleeve bearing) – Rated Temperature: 40 °C continuous – MTBF: 100,000 hours – ATX Connector: 1 – EPS12V Connector: 1 – PCIe Connectors: 2 – SATA Connectors: 6 – Floppy Connector: 1 – Cable Type: Low-profile, all-black flat-sleeved – Zero RPM Mode: No – iCUE Compatibility: No – Warranty: 3 years