MSI MAG A550BN 550W ATX Power Supply 80 PLUS Bronze

The MSI MAG A550BN is a 550W ATX desktop computer power supply built around 80 PLUS Bronze efficiency certification, making it a solid, no-nonsense foundation for a first-time PC build or a budget-conscious upgrade.

Stable, Efficient Power Without the Complexity

• 550W output with a single 12V rail delivers clean, consistent power to your components
• 80 PLUS Bronze certified efficiency reduces wasted energy and keeps electricity costs in check
• DC-to-DC circuit design tightens output voltage regulation for improved system stability
• Active PFC improves power factor and helps protect against input voltage fluctuations
• 120mm low-noise fan with sleeve bearing keeps thermals under control without adding distracting sound

The MAG A550BN suits builders putting together an entry-level gaming PC, a home office desktop, or any mid-range ATX system where reliable, efficient power delivery matters more than modular cables or extreme wattage headroom.