About MSI MAG A550BN 550 W 80 Plus Bronze Non‑Modular PSU
The MSI MAG A550BN is intended for gamers and regular PC users on a tight budget who want dependable power without going overboard. Under typical operating conditions, its 80 Plus Bronze certification allows it to achieve up to 86–88% efficiency, which keeps your system cool and your power bills low.
This non-modular unit has a solid single 12 V rail rated at approximately 45 A, an active PFC, and DC-to-DC voltage regulation. It complies with ATX 2.4 standards. It has a silent 120 mm fluid dynamic bearing fan that stays quiet under loads until it reaches about 300 W, and it has all the necessary protections, including OVP, OCP, OPP, SCP, and OTP, despite its low build cost. Internally, MSI collaborated with a respectable OEM (CWT) and struck a balance between price and quality; users and reviewers praise its consistent performance and general effectiveness. For common desktop builds, the 5-year warranty offers good peace of mind.
Features of the MSI MAG A550BN 550 W 80 Plus Bronze Non‑Modular PSU
| Feature | Specification |
|---|---|
| Wattage | 550 W continuous output |
| Efficiency | 80 Plus Bronze (~86–88% at typical loads) |
| PFC & Regulation | Active PFC, DC-to-DC design |
| Rail Design | Single 12 V rail (≈45 A) |
| Fan | 120 mm fluid dynamic bearing, quiet under 300 W load |
| Cabling | Flat non-modular cables: ATX, EPS, 2× PCIe, 5× SATA, Molex, FDD |
| Protections | OVP, UVP, OCP, OPP, SCP, OTP |
| Form Factor | Compact ATX – 140 × 150 × 86 mm |
| Warranty | 5 years |
| Connector Set | 1× 20 4 pin ATX, 1× 4 4 CPU, 2× PCIe 6 2, 5× SATA, 2× Molex, 1× FDD |
Ideally Best For
- Entry-level to mid-range gaming builds
- Office and general-purpose desktops
- Users who need a compact, non-budget PSU under standard loads
- Quiet PC setups due to low fan noise under light use
- Builders valuing long-term peace of mind with a 5-year warranty
Buy MSI MAG A550BN 550 W 80 Plus Bronze Non‑Modular PSU – Compact ATX, 5‑Year Warranty Online Today.
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