MSI MAG A550BN 550W 80+ Bronze Non-Modular Power Supply Unit

550W Non-Modular ATX PSU — 80 PLUS Bronze (up to 85% efficiency), Single +12V Rail (546W), DC-DC Circuit Design, 120mm Low-Noise Fan, Active PFC, 5-Year Warranty.

The MSI MAG A550BN is a 550W non-modular ATX power supply designed for entry-level and mid-range gaming PCs. With 80 PLUS Bronze efficiency up to 85%, a single +12V rail delivering up to 546W, and a 120mm low-noise sleeve bearing fan, it provides stable and efficient power for modern mainstream CPUs and GPUs. DC-to-DC circuit design, active PFC, and full industrial-grade protection (OCP, OVP, OPP, OTP, SCP) ensure reliable operation, making the MAG A550BN a solid choice for budget-conscious gaming and office builds.[web:377][web:378][web:380][web:381]

>80 PLUS Bronze Efficiency — Up to 85% efficiency under typical loads reduces wasted power and heat, improving system efficiency and lowering electricity usage.[web:378][web:380][web:386] >Single +12V Rail — Delivers up to 45.5A / 546W on the +12V rail for stable power to the CPU and GPU, ideal for mainstream gaming builds.[web:377][web:380][web:381] >DC-to-DC Circuit Design — Improves voltage stability on the minor rails and helps maintain reliable power delivery under changing loads.[web:378][web:379][web:387] >120mm Low-Noise Fan — 120mm sleeve-bearing fan balances cooling and acoustics for quiet operation during gaming and everyday use.[web:378][web:382][web:387] >Active PFC — Active power factor correction reduces reactive power and improves input power quality.[web:378][web:380][web:386] >Industrial-Grade Protections — Includes OCP, OVP, OPP, OTP, and SCP to safeguard your system against electrical faults.[web:378][web:380][web:382] >Non-Modular Design — Fixed cables reduce cost and complexity, suitable for budget builds where ultimate cable minimization is not critical.[web:380][web:382] >5-Year Warranty — Backed by MSI with a 5-year limited warranty, indicating confidence in long-term reliability.[web:378][web:379][web:387]