MSI MAG A550BN, Non-Modular Compact 550W Power Supply, 80+ Bronze, Low-Noise Fan, Active PFC Design, 5 Year Warranty
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AI Verdict
A 550W 80 Plus Bronze non-modular ATX power supply for budget PC builds, but expect basic cable management and potential fan noise under load.
This 550W 80 Plus Bronze power supply with a 5-year warranty is a viable option for basic, entry-level PC builds. Its non-modular design and 550W capacity mean it's not suited for high-performance systems or those requiring extensive cable management. It's a budget-friendly choice that gets the job done for less demanding setups.
For more powerful systems, better cable management, or future-proofing, look for a 650W+ 80 Plus Gold or Platinum rated power supply with a fully modular design.
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Pros
- 80 Plus Bronze certified for at least 85% efficiency at 50% load
- Includes a 5-year limited warranty
- Compact size, measuring 14 cm wide and 8.6 cm tall, fitting most cases
- Features comprehensive circuit protection (OCP/OPP/SCP)
- Fan maintains low speed and quiet operation until load exceeds 300 watts
- Offers stable performance for entry-level builds
Cons
- Non-modular design means all cables are permanently attached, creating clutter
- Fan can become audible or produce buzzing noises above 300 watts of load
- Lacks a 12+4 PCI Express connector required for some newer, high-power GPUs
- Some users report efficiency drops under heavy loads
- Warranty support can involve long wait times and poor customer service experiences
Dimension Scores
It meets its 80 Plus Bronze certification with 86.1% average nominal load efficiency at 115 VAC, but some users report efficiency drops under heavy loads.
The low-noise fan stays quiet up to 300 watts, but can become audible or buzz under higher loads, specifically above 300-400 watts.
Many users describe it as 'solid', but Tom's Hardware notes 'limited component quality' and some buyers received defective units.
The non-modular design means all cables are permanently attached, making clean cable management difficult and potentially leading to clutter.
Best For
- Entry-level gaming PCs with less demanding GPUs
- Office or general-purpose PCs with integrated graphics
- Budget-conscious PC builders prioritizing initial cost
- Systems with estimated wattage around 230W, allowing for slight upgrades
Not Recommended For
- High-end gaming rigs or systems with power-hungry GPUs needing a 12+4 pin PCIe connector
- Users who prioritize silent operation under sustained heavy system loads
- PC builders who demand pristine cable management without extra effort
Watch Out For
- Non-modular cables are permanently attached, making cable routing and tidiness challenging in smaller cases.
- The fan can become audible or produce buzzing noises when the power supply load exceeds 300 watts.
- Some users have reported that the 80 Plus Bronze efficiency drops under heavy system loads.
- Warranty claims might involve long wait times and poor customer service, according to some user experiences.
- This unit does not include a 12+4 PCI Express connector, limiting compatibility with the latest high-power graphics cards.
Full Specifications
| ASIN | B0991W1HKT |
| Brand | msi |
| Series | FBAMSIA550BN |
| Voltage | 220 |
| Wattage | 550 watts |
| Language | English, English, English, English |
| Batteries | 1 D batteries required. |
| Model Name | FBAMSIA550BN |
| Form Factor | ATX |
| Item Weight | 4.4 pounds |
| Manufacturer | MSI |
| Connector Type | ATX |
| Cooling Method | Air |
| Output Wattage | 550 |
| Item model number | 306-7ZP2A11-CE0 |
| Compatible Devices | Personal Computer |
| Product Dimensions | 5.91 x 5.51 x 3.39 inches |
| Computer Memory Type | DIMM |
| Item Dimensions LxWxH | 5.91 x 5.51 x 3.39 inches |
| Item dimensions L x W x H | 5.91 x 5.51 x 3.39 inches |
| Standing screen display size | 16 Inches |
| Is Discontinued By Manufacturer | No |
What Buyers Say
Many users find this 550W 80 Plus Bronze power supply easy to install and appreciate its compact size. While generally quiet at lower loads, some report fan noise or buzzing when the system draws more than 300 watts. The non-modular cables are a common point of frustration, leading to messy builds, and it lacks the 12+4 pin PCIe connector for modern high-end GPUs. Some buyers also noted issues with warranty support, including long wait times.
“I just needed something cheap for my basic gaming PC, and it works, but man, these cables are a nightmare to hide, and sometimes I hear a faint buzz when I'm really pushing it.”
Common Praise
- Easy to install in PC cases
- Compact size fits snugly into most builds
- Provides stable performance for budget-oriented systems
- Comes with a 5-year warranty for peace of mind
- Quiet operation at lower power draws (under 300 watts)
Common Complaints
- Non-modular cables are difficult to manage and create clutter inside the case
- Fan becomes audible or produces buzzing noises under heavier system loads
- Efficiency reportedly drops when the unit is under significant stress
- No 12+4 PCI Express connector for compatibility with newer, power-hungry graphics cards
- Experiences with warranty service can involve long wait times and poor customer support
Ownership Tips
- The permanently attached cables are often stiff and challenging to bend for neat routing.
- Fan noise can sometimes develop or become more noticeable after several months of use.
- The 550W limit can quickly become a bottleneck if you plan on upgrading your GPU to a more powerful model.
- The unit tends to run warm under sustained heavy loads, indicating heat dissipation is working but not exceptionally cool.
Frequently Asked Questions
Is the MSI MAG A550BN a modular power supply?
No, it is a non-modular power supply, meaning all cables are permanently attached to the unit and cannot be removed.
How quiet is the fan on this power supply?
It features a low-noise fan that generally operates quietly, maintaining a very low speed until the load exceeds 300 watts. However, some users report it becoming audible or producing buzzing noises under heavier loads.
What kind of warranty does this power supply come with?
The MSI MAG A550BN includes a 5-year limited manufacturer's warranty.
Is this power supply suitable for gaming PCs?
It is suitable for entry-level gaming PCs with less demanding graphics cards. However, it lacks the 12+4 pin PCIe connector needed for the latest high-end GPUs.
What does '80 Plus Bronze Certified' mean for this power supply?
The 80 Plus Bronze certification indicates that the power supply achieves at least 85% efficiency at 50% load (at 115 VAC), meaning less power is wasted as heat compared to unrated units.
Buying Guide
A power supply unit (PSU) is like the heart of your computer, converting the AC power from your wall outlet into the DC power your components need. You need to match its wattage to your PC's total power requirements, plus some headroom for stability and future upgrades. The '80 Plus Bronze' rating tells you how efficiently it does this; higher ratings mean less wasted energy as heat and potentially lower electricity bills.
Wattage (550 watts)
This is the maximum power your PSU can deliver. If your PC's components (CPU, GPU, etc.) demand more power than the PSU can supply, your system will be unstable or won't even turn on. 550W is suitable for entry-level systems, but not for high-end gaming.
80 Plus Bronze
This certification indicates the PSU is at least 85% efficient at 50% load. Think of it like fuel efficiency in a car: a more efficient PSU wastes less power as heat, which can save you a little on your electricity bill and means less heat inside your PC case.
Non-Modular
This refers to the cables. A non-modular PSU has all its cables permanently attached. This can make building your PC and managing cables inside the case more difficult, as you'll have extra cables to hide even if you don't use them all.
Alternatives
If you need more power for a high-end graphics card, desire a cleaner-looking build with easier cable management, or want higher energy efficiency, look for power supplies with 80 Plus Gold or Platinum ratings, fully modular cable designs, and wattages of 650W or more.
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