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MSI MAG A550BN, Non-Modular Compact 550W Power Supply, 80+ Bronze, Low-Noise Fan, Active PFC Design, 5 Year Warranty
MSI

MSI MAG A550BN

Bottom line: The MSI MAG A550BN ($54.99 on Amazon as of 2026-10-06): 5-year limited warranty, double the typical budget-PSU term; main trade-off: non-modular: every cable is permanently attached, unused ones included.

$54.99

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Buy on Amazon — $54.99 Compare to similar power supplies & cables

By , Founder & Editor-in-Chief · Listing data updated

Mike Perry — Hardware researcher since 2014. For retro PC hardware and period-correct parts, synthesises manufacturer documentation, community compatibility lists and marketplace listings rather than first-hand lab testing. Core beat: GPU performance across gaming, rendering, and local-LLM inference.

*Price sourced from Amazon.com. Last updated 2026-10-06. Price and availability subject to change.

Pros & Cons

Pros

  • ✓ 5-year limited warranty, double the typical budget-PSU term
  • ✓ Compact chassis fits short-depth and SFF-adjacent cases
  • ✓ Low-noise fan keeps desk-side builds quiet under normal load

Cons

  • ✗ Non-modular: every cable is permanently attached, unused ones included
  • ✗ 550W caps you out of high-draw GPUs like the RTX 4080 and up
  • ✗ Bronze tier sits below Gold and Platinum on efficiency
  • ✗ Fixed cable harness makes clean routing harder in small cases

Manufacturer description

The MSI MAG A550BN is a compact 550W non-modular power supply built for budget desktop and small-form-factor builds where a short chassis and a simple cable run matter more than modularity. It carries 80 PLUS Bronze certification, so it hits the efficiency tier most mainstream builds target, and MSI backs it with a 5-year limited warranty rather than the 1-2 year terms common at this price point. Active PFC handling and a low-noise fan keep the unit unobtrusive under typical desktop loads, which matters in a build sitting on a desk rather than under one. The non-modular design means every…

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SpecPicks Verdict

SpecPicks scored MSI MAG A550BN using a rating × review-volume × price-fit model applied to published specs and reviews across the power supplies & cables category. MSI's power supplies & cables lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for power supplies & cables of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.

Frequently Asked Questions

Is 550W enough for a gaming PC?

550W comfortably covers a mainstream build with a mid-range GPU and a 6-8 core CPU. For high-draw cards in the 300W+ class, step up to a higher-wattage unit and check the GPU maker's recommended PSU rating.

What does 80 PLUS Bronze actually mean here?

Bronze certification means the A550BN meets a defined efficiency threshold at typical load levels, wasting less power as heat than an uncertified unit. It sits below Gold and Platinum tiers but above the uncertified budget field.

How long is the warranty on the MSI MAG A550BN?

MSI lists a 5-year limited warranty on this unit, which is roughly double the 2-3 year coverage common in this price tier. Check the product listing for current terms and regional coverage.

Does non-modular mean I get extra cables I can't remove?

Yes. Every cable is permanently attached to the PSU, so any connectors your build doesn't use have to be tucked away in the case rather than left out of the box.

Is this power supply quiet?

MSI specs a low-noise fan, and owner feedback is broadly positive. Actual noise scales with load and case airflow; specific dBA figures are not published in the listing.

Key Features

  • 80 PLUS Bronze CERTIFIED
  • 5-year limited warranty, guaranteeing long term reliable operation
  • Low Noise Fan

Full Specifications

Size550W
Brandmsi
ColorBlack
Model306-7ZP2A11-CE0
Warranty10 Year Limited Manufacturer
UnitCount1
ReleaseDate2022-03-30T00:00:01Z
ManufacturerMSI
ItemPartNumber306-7ZP2A11-CE0
Full listing titleMSI MAG A550BN, Non-Modular Compact 550W Power Supply, 80+ Bronze, Low-Noise Fan, Active PFC Design, 5 Year Warranty

Ready to buy?

MSI MAG A550BN, Non-Modular Compact 550W Power Supply, 80+ Bronze, Low-Noise Fan, Active PFC Design, 5 Year Warranty is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

Buy on Amazon — $54.99

*Price sourced from Amazon.com. Last updated 2026-10-06. Price and availability subject to change.

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MSI MAG A550BN, Non-Modular Compact 550W Power Supply, 80+ Bronze, Low-Noise Fan, Active PFC Design, 5 Year Warranty
$54.99
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