MAG A550BN

MSI MAG A550BN | Efficient 550W Bronze ATX PSU

The MSI MAG A550BN UK PSU delivers 550W of reliable power for DIY PC builders in the UK. Featuring 80 Plus Bronze certification, a 12V single-rail design, and DC-to-DC circuitry, this ATX power supply unit offers stable performance for gaming and everyday computing without the need for additional configuration.

Key Specs at a Glance

Stable Power Delivery for Your PC Build

The MAG A550BN uses a 12V single-rail architecture that simplifies installation and ensures consistent power delivery to all components. With a combined +12V output of 546W, it handles modern CPUs and GPUs with ease. The DC-to-DC circuit design stabilises voltage output, reducing fluctuations that can affect system performance during demanding tasks.

Efficient Performance Meets Quiet Operation

Earning 80 Plus Bronze certification, this PSU operates at up to 85% efficiency, reducing energy waste and lowering electricity costs over time. The 120mm fan with sleeve bearing provides effective cooling while maintaining low noise levels, making it suitable for quiet home office setups or gaming rigs where acoustic performance matters.

Comprehensive Protection for Peace of Mind

Built-in safety features include over-current protection (OCP), over-voltage protection (OVP), short-circuit protection (SCP), over-power protection (OPP), and over-temperature protection (OTP). These mechanisms safeguard your valuable components from electrical damage, ensuring reliable operation throughout the PSU’s service life.

Box Contents

• MSI MAG A550BN PSU unit
• UK power cord
• Mounting screws
• User manual

Check Before You Buy

• Confirm your case supports standard ATX PSU dimensions (150 x 140 x 86 mm)
• Verify your system’s total power draw stays under 550W
• Check that your motherboard uses a 20+4 pin ATX connector
• Ensure you have enough SATA and Molex connectors for your drives and peripherals

Frequently Asked Questions

Q: Is this PSU suitable for gaming PCs?

A: Yes, the 550W capacity and single 12V rail make it suitable for mid-range gaming systems with modern components.

Q: Does it come with a UK plug?

A: Yes, the MAG A550BN includes a UK power cord as standard.

Q: Are the cables sleeved?

A: Yes, the non-modular cables feature black sleeves for improved appearance and cable management.

Q: What are the dimensions of this PSU?

A: It measures 150mm wide, 140mm deep, and 86mm high, fitting standard ATX cases.

Q: How many PCIe connectors does it have?

A: The PSU includes two 6+2 pin PCIe connectors for graphics card power.

The Consultant’s Verdict & Warranty

The MSI MAG A550BN represents excellent value for UK-based PC builders seeking a dependable, efficient power supply without unnecessary complexity. Its 80 Plus Bronze certification, comprehensive protection features, and quiet operation make it particularly suitable for first-time system builders or upgrades where reliability matters more than premium features. Covered by the standard manufacturer warranty.