ASRock 550W ATX PSU 90-UXC055-BNGAAA

ASRock Challenger CL-550B | 80+ Bronze ATX Power Supply

The ASRock PSU 550W ATX 90-UXC055-BNGAAA delivers reliable power for mid-range gaming and workstation builds. With 80+ Bronze certification and a fully wired design, this Challenger series unit balances efficiency, quiet operation, and long-term durability for UK PC builders.

Key Specifications

Built for Efficiency and Quiet Operation

The 80+ Bronze certification ensures at least 85 % efficiency under typical loads, reducing wasted energy and heat output. This means lower electricity costs over time and a cooler-running system. The 120 mm golf-blade fan provides effective cooling while maintaining quiet operation, even during extended gaming sessions or heavy workloads.

Fully Wired for Easy Installation

Every cable is pre-attached, eliminating the need to manage modular connections during installation. This fully wired design simplifies setup for first-time builders and speeds up upgrades for experienced users. The ATX 2.52 standard ensures compatibility with modern motherboards and components.

Built-In 5V Boost Function

The integrated 5V boost function delivers stable power to USB and other low-voltage components, preventing brownouts and ensuring consistent performance. This feature is particularly useful for systems with multiple storage drives or high-powered peripherals.

Reliable 5-Year Warranty

Backed by a 5-year manufacturer warranty, the ASRock Challenger CL-550B offers long-term peace of mind. This coverage reflects ASRock’s confidence in the PSU’s build quality and reliability, making it a dependable choice for both home and office systems.

Box contents

• ASRock Challenger CL-550B 550W PSU
• Power cable (UK plug not specified – confirm with seller)
• Mounting screws
• User manual

Check before you buy

• Confirm the PSU includes a UK 3-pin plug or requires an adapter.
• Verify your system’s total power draw is within 550 W capacity.
• Check that your case supports standard ATX PSU dimensions.
• Ensure ATX 2.52 compatibility with your motherboard.

Frequently Asked Questions

Q: Is this PSU suitable for gaming PCs?

A: Yes, the 550 W output and 80+ Bronze rating make it ideal for mid-range gaming systems.

Q: Does it come with all necessary cables?

A: Yes, it is fully wired with all required ATX and peripheral cables pre-attached.

Q: What does 80+ Bronze certification mean?

A: It means the PSU is at least 85 % efficient under typical loads, reducing energy waste.

Q: Can I use this PSU in a small form factor case?

A: It is a standard ATX size; confirm your case supports full-size PSUs before purchase.

Q: Is the fan noisy under load?

A: The 120 mm golf-blade fan is designed for quiet operation even during heavy use.

The Consultant’s verdict & warranty

The ASRock Challenger CL-550B is a dependable choice for UK users building or upgrading mid-range PCs. Its 80+ Bronze efficiency, fully wired convenience, and quiet cooling make it well-suited for gaming, content creation, and everyday use. Covered by the standard manufacturer warranty, this PSU offers solid performance without unnecessary complexity.