Corsair CX Series CX550 550W 80 PLUS Bronze Power Supply - Pre Owned

Dependable 80 PLUS Bronze Efficiency for Everyday Builds

The Corsair CX Series CX550 power supply is designed to provide a steady, continuous supply of electrical power to entry-level and mid-range PC setups. Rated with 80 PLUS Bronze certification, the CX550 operates at up to 88% operational efficiency under typical loads. This level of efficiency keeps electricity consumption down, minimizes waste heat generation within the PC case, and allows the internal cooling fan to run at lower, quieter speeds during regular workloads.

Unlike peak-rated budget power supplies, the CX550 provides a guaranteed continuous 550 Watts of power output. Its single +12V rail design ensures that maximum current is directed smoothly to power-demanding components like modern CPUs and mid-range dedicated graphics cards without unexpected system shutoffs or voltage drops during load spikes.

Optimized Thermal Management and Low Acoustic Noise

Cooling performance inside the Corsair CX550 is managed by a thermally controlled 120mm intake fan. The internal thermal sensor dynamically monitors system temperature and scales fan speed accordingly. During lightweight workloads—such as web browsing, document processing, or media streaming—the fan spins at low RPMs for quiet background operation. When running games or intensive tasks, the fan gradually increases speed to pull cool air across critical power components, maintaining low internal operating temperatures without creating excessive noise.

Clean Design and Black Sleeved Cables

The CX550 features a compact matte-black casing and black sleeved cables that blend seamlessly into any modern dark-themed chassis. The standard ATX housing depth fits easily into almost all mid-tower and compact desktop cases without crowding drive bays or obstructing bottom-panel intake vents. The long cable lengths provide plenty of reach for clean routing through back-panel cutouts, helping keep the main interior space free of clutter and enabling unobstructed airflow across your graphics card and CPU cooler.

Complete Heavy-Duty Circuit Protections

To protect your sensitive desktop components against potential electrical grid instability, the Corsair CX550 incorporates a comprehensive suite of hardware protections:

• Over Voltage Protection (OVP)

• Under Voltage Protection (UVP)

• Short Circuit Protection (SCP)

• Over Temperature Protection (OTP)

• Over Power Protection (OPP)

These safety layers safeguard your motherboard, storage drives, and graphics card against electrical grid spikes, sudden voltage drops, or internal component shorts.

Multi-Point Testing and Refurbishment Workflow

Before being listed for sale, every pre-owned Corsair CX550 power supply in our inventory goes through rigorous testing procedures to guarantee 100% functional reliability:

1. Physical & Visual Inspection: Thorough physical check for casing condition, fan guard integrity, and main power switch operation.

2. Digital Voltage Load Test: Real-time digital testing on +12V, +5V, +3.3V, and +5VSB rails to confirm output accuracy under varying load conditions.

3. Continuous Load Burn-In: Extended load testing to monitor fan curve acoustics, air discharge temperatures, and electrical rail stability.

4. Connector Continuity Check: Every ATX, EPS, PCIe, and SATA connector is checked for clean pinout continuity and secure latching.

Units arrive in clean, pristine condition with minimal to no visible signs of prior use.

Package Contents & Seller Warranty

Included in the package is the pre-owned Corsair CX550 Power Supply Unit along with integrated cabling and AC power cord. Backed by our standard 1-Month Seller Replacement Warranty for total peace of mind.

Technical Specifications