Corsair CP-9020277-NA CX550 550W 80+ Bronze Power Supply

The Corsair CX550 is a straightforward ATX power supply designed for builders who want reliable, efficient power without unnecessary complexity. It delivers a full 550W of continuous power — not peak — backed by 80 PLUS Bronze certification that pushes operational efficiency up to 88%. That efficiency translates directly into less wasted energy as heat, contributing to lower case temperatures and reduced electricity bills over the life of the unit. A 120mm thermally controlled fan manages cooling duties, spinning slowly during light workloads and only increasing speed when the PSU is under sustained heavy load, keeping acoustic output low during everyday use.

At just 125mm long, the CX550 is notably compact for an ATX power supply, giving it broad compatibility with modern mid-tower and even some smaller cases where PSU clearance is tight. The black sleeved cables and powder-coated metal casing help it blend into builds without drawing attention. While the non-modular design means every cable is permanently attached — requiring some cable management effort — it also keeps the unit simple and cost-effective. For office workstations, home PCs, and mid-range gaming rigs that stay within the 550W envelope, the CX550 provides the kind of quiet, stable foundation a build depends on.