CORSAIR Power Supply - Cx Series Cx550 Unit 550 W 24-pin ATX Black

The Corsair CX Series CX550 is a 550 W power supply unit designed for standard PC builds. It provides stable power delivery with a 24-pin ATX connector, supports 100–240 V AC input at 47–63 Hz, and features a compact 125 mm depth casing to fit most modern computer cases. The unit uses non-modular cables and includes a thermally controlled 120 mm fan with active cooling to maintain operating temperatures. The CX550 holds an 80 PLUS Bronze efficiency rating to reduce energy loss and heat generation.

Advantages

The CX550 offers up to 88% operational efficiency under typical loads thanks to its 80 PLUS Bronze certification, which lowers energy consumption and heat output. Its thermally controlled 120 mm fan adjusts speed according to load for reduced noise during light operation. The compact 125 mm-long casing allows easy installation in most modern PC cases, and the 24-pin ATX connector ensures compatibility with standard motherboards.

Suitable for

• Everyday desktop and office PCs
• Entry-level to mid-range gaming systems
• Home builds and system upgrades

Key specifications

• Total power: 550 W
• Motherboard power connector: 24-pin ATX
• 80 PLUS certification: 80 PLUS Bronze (up to ~88% efficiency)
• Fan diameter: 120 mm, thermally controlled
• Input voltage: 100–240 V AC, 47–63 Hz
• Casing depth: 125 mm
• Product colour: Black

How to use

Install the CX550 into a compatible PC case following standard safety precautions: disconnect mains power before installation, secure the PSU with the case screws, connect the 24-pin ATX connector to the motherboard and attach any required peripheral connectors. Ensure adequate case ventilation and route cables to avoid obstructing airflow. Use the PSU with systems whose total power draw does not exceed the rated 550 W.

Recommendations

For reliable operation, operate the power supply within its specified AC input range (100–240 V, 47–63 Hz), keep the 120 mm fan and ventilation areas free of dust, and avoid prolonged operation near the PSU's maximum rated load to extend component lifespan.