MSI MAG A550BN 550W PSU - 80 Plus Bronze, Non-Modular
MSI
MSI MAG A550BN 550W PSU - 80 Plus Bronze, Non-Modular
The MSI MAG A550BN is an entry-level ATX power supply designed for budget-conscious builders and gamers who need reliable power delivery without modular cable management. It combines 80 Plus Bronze efficiency, a 120mm low-noise fan, and comprehensive protection circuits in a compact, straightforward package.
Why this product
80 Plus Bronze efficiency
Certified for up to 85% energy conversion efficiency, reducing power waste and operating costs over time.
120mm low-noise fan with sleeve bearing
Maintains effective cooling while keeping system noise minimal during gaming and everyday use.
DC-DC circuit design
Stabilises output voltage across all rails, reducing the risk of component damage from power fluctuations.
Five-layer protection suite
OCP, OVP, OPP, OTP, and SCP safeguards protect connected hardware from overload, overvoltage, and thermal faults.
Non-modular design
All cables are permanently attached, simplifying build complexity and reducing assembly time.
- Power output550W
- Efficiency rating80 Plus Bronze (up to 85%)
- Form factorATX
- ModularNo
- Fan size120mm
- Dimensions140 x 150 x 86 mm
- SKUMSI-7262
- EAN4719072870485
- Works with standard ATX motherboards via 24-pin main power connector and single 4+4 pin EPS connector for CPU power.
- Supports two PCIe 6+2 pin connectors for graphics cards up to dual-slot configurations.
- Provides five SATA connectors for solid-state drives, mechanical drives, and other legacy SATA peripherals.
- Non-modular cabling means all cables are permanently attached; excess cables must be routed and managed within the case.
- 550W capacity suits mid-range systems; high-end graphics cards and multi-GPU builds may require higher wattage.
Best for
- Budget builds and entry-level gaming rigs
- Straightforward system builders who prefer simplicity over modular convenience
- Compact or small-form-factor cases where non-modular cabling is manageable
- Users prioritising reliability and protection over premium features
Trade-offs
- High-end or multi-GPU systems: 550W is insufficient for flagship graphics cards or power-hungry CPUs paired together.
- Cable-management perfectionists: Non-modular design means all cables remain attached, requiring more case space and routing work.
- Premium efficiency seekers: 80 Plus Bronze is entry-level; Gold or Platinum units offer higher efficiency at higher cost.
The MAG A550BN provides players with a safe, reliable, and efficient entry-level power supply option. After installation, gamers can immediately enjoy a reliable performance experience without additional settings.
80 PLUS BRONZE CERTIFIED
The 80 PLUS BRONZE certification promises lower energy consumption and higher efficiency.
120mm LOW NOISE FAN
The fan's sleeve bearing reduces the noise generated while maintaining excellent heat dissipation.
DC TO DC CIRCUIT DESIGN
Adopted DC-DC circuit design reduces the instability of output voltage, and adds stability to the supply of power.
General
| Brand | MSI |
|---|---|
| Model | MAG A550BN |
| Form factor | ATX |
| Modular design | No |
Power & efficiency
| Total output | 550W |
|---|---|
| Efficiency rating | 80 Plus Bronze (up to 85%) |
| PFC type | Active PFC |
| +12V rail output | 45.5A |
| +5V rail output | 20.0A |
| +3.3V rail output | 20.0A |
Cooling & protection
| Fan size | 120mm |
|---|---|
| Fan bearing type | Sleeve Bearing |
| Protection circuits | OCP, OVP, OPP, OTP, SCP |
| Circuit design | DC-DC |
Connectors
| ATX 24-pin | 1 |
|---|---|
| EPS 4+4 pin (CPU) | 1 |
| PCIe 6+2 pin | 2 |
| SATA 15-pin | 5 |
| Molex 4-pin | 2 |
| FDD 4-pin | 1 |
Physical
| Dimensions (D x W x H) | 140 x 150 x 86 mm |
|---|---|
| Input voltage range | 100–240 VAC |
| Input frequency | 50–60 Hz |
Shipping
All our products are shipped from the United Kingdom within 24 to 48 hours of purchase. See our Shipping and Returns page for full details.
Returns
- Tech Syndicate offers a full money-back guarantee on all purchases made in our store. If you are not satisfied with your purchase, we will provide a full refund, no questions asked.
- Refunds are available within 45 days of delivery.
- After the 45-day period you are no longer eligible for a refund, so we encourage you to try the product within the first few weeks to make sure it fits your needs.