Msi MAG 850W Fully Modular or Msi MPG 850W Gold ATX? Which Msi Model to Buy
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You are deciding between the msi mag 850w fully modular vs mpg 850w gold atx for your build. Both units offer 850W of power, 80 Plus Gold efficiency, and full modularity. They share the ATX 3.1 standard and PCIe 5.1 readiness with native 12V-2x6 connectors. The main difference lies in their physical dimensions. The MPG model is significantly more compact than the MAG version. This size variation affects compatibility with smaller chassis designs.
Key differences
| Aspect | MSI MAG 850W Fully Modular ATX Power Supply | MSI MPG 850W Gold ATX 3.1 Power Supply |
|---|---|---|
| Width | 8.75 inches | 5.91 inches |
| Height | 4.92 inches | 3.39 inches |
| Length | 12 inches | 5.91 inches |
| Capacitors | not listed | 100% Japanese 105°C |
Which one should you choose?
Choose MSI MAG 850W Fully Modular ATX Power Supply if
- You need a standard ATX size that fits in larger cases with ample clearance.
- You prefer a unit with a longer length that may aid in airflow routing in spacious builds.
- You do not require the compact footprint provided by the MPG series.
Choose MSI MPG 850W Gold ATX 3.1 Power Supply if
- You are building in a small form factor case where width and height are critical.
- You want the shortest possible power supply length for easier cable management.
- You prioritize the listed Japanese 105°C capacitors for potential thermal durability.
Verdict: The MSI MAG 850W is suitable for standard mid-tower cases where size constraints are minimal. The MSI MPG 850W is the better choice for compact builds due to its significantly smaller footprint. Both provide identical performance specifications for gaming systems.
MSI MAG vs MPG 850W Specs
Physical Dimensions
The MSI MAG measures 12 inches in length, 8.75 inches in width, and 4.92 inches in height. This is a standard ATX form factor size. The MSI MPG is significantly more compact. It measures only 5.91 inches in length, 5.91 inches in width, and 3.39 inches in height. This smaller footprint makes the MPG easier to fit into tight cases. You should check your case clearance carefully. The MPG fits where the MAG might not. If space is limited, the MPG is the better choice for installation.
Weight
The MSI MPG lists a weight of 7.15 pounds. This is a concrete specification provided in the data. The MSI MAG does not list a weight in the provided specifications. You cannot compare the mass of the two units directly. Both use similar internal components for 850W output. The weight difference is likely due to the size difference. However, without data for the MAG, you cannot determine which is heavier or lighter. This round is a tie due to missing information.
Efficiency Rating
Both power supplies share the same efficiency rating. The MSI MAG is 80 Plus Gold certified. The MSI MPG is also 80 Plus Gold certified. This means both units convert at least 87% of AC power to DC power at typical loads. You will save on electricity costs with either model. There is no difference in energy efficiency between them. The MAG uses Japanese capacitors as noted in the MPG description, implying similar build quality. For efficiency alone, they are equal.
ATX Version
Both units support the latest ATX 3.1 standard. The MSI MAG is ATX 3.1 ready. The MSI MPG is also ATX 3.1 ready. This ensures compatibility with modern motherboards and power delivery requirements. You get the same baseline compatibility with either choice. The MPG highlights 100% Japanese 105°C capacitors, which may aid longevity under the ATX 3.1 load profiles. The MAG does not specify capacitor origin in the key specs. Both meet the same version standard for your build.
PCIe Version
Both power supplies support PCIe 5.1. The MSI MAG is PCIe 5.1 ready. The MSI MPG is also PCIe 5.1 ready. This is crucial for new graphics cards that use the 12V-2x6 connector. You can connect your GPU directly without adapters on either unit. The MPG explicitly mentions a native 12V-2x6 cable. The MAG lists the 12V-2x6 connector type. Both provide the same modern connectivity for high-end GPUs. This aspect is identical for your needs.
Modularity
Both units are fully modular. The MSI MAG is fully modular. The MSI MPG is also fully modular. You can detach all cables from both power supplies. This allows for cleaner cable management in your case. You only plug in the cables you need. The MPG lists a 10-year limited warranty. The MAG also lists a 10-year warranty. The modularity level is the same. You get the same benefit of reduced clutter and better airflow with either choice.
Capacitor Quality
The MSI MPG explicitly lists 100% Japanese 105°C capacitors. This is a specific build detail provided in the features. The MSI MAG does not list capacitor origin or temperature rating in the provided data. Japanese capacitors are often preferred for stability and heat resistance. The 105°C rating suggests high durability. Since the MAG data lacks this detail, you cannot verify its build quality here. The MPG wins this round by providing verifiable component details.
Which Msi 850W Model Fits You
Small form factor builders
The MPG model is significantly smaller, measuring 5.91 inches square. This compact footprint allows for easier installation in mini-ITX or micro-ATX cases where space is tight. You get the same 850W output and ATX 3.1 compatibility in a much tighter package than the standard MAG unit.
Standard ATX case users
The MAG model fits standard ATX cases with its 12-inch length. This size often provides better airflow clearance around the unit. You get full modularity and 80 Plus Gold efficiency. The standard dimensions make it compatible with most mid-tower and full-tower chassis without fitting concerns.
Long-term reliability seekers
Both units offer a 10-year warranty, but the MPG highlights 100% Japanese 105°C capacitors. These components handle heat better and may extend the lifespan of the power supply. If you plan to keep your PC for many years, this component quality offers peace of mind alongside the warranty.
The products compared
MSI MAG 850W Fully Modular ATX Power Supply
Best for: Modern gaming PCs with PCIe 5.1 GPUs
- Wattage
- 850W
- Efficiency Rating
- 80+ Gold
- Modularity
- Fully Modular
- ATX Version
- ATX 3.1
- PCIe Connector Type
- 12V-2x6
- Warranty
- 10 Year
View on Amazon: MSI MAG 850W Fully Modular ATX Power Supply Affiliate link
This is an 850W fully modular power supply designed for gaming builds. It meets ATX 3.1 and PCIe 5.1 standards with an 80+ Gold efficiency rating. The unit features a 12V-2x6 connector for modern graphics cards. It includes a 10-year warranty. You should consider this model if you need reliable power for high-end components in a compact form factor.
Pros
- 80+ Gold efficiency rating
- ATX 3.1 and PCIe 5.1 ready
- 12V-2x6 connector included
- 10-year warranty coverage
- Fully modular cable design
Cons
- 8.75-inch width may not fit all cases
- 12-inch length requires spacious chassis
- No LCD display for real-time monitoring
Good fit if
- You are building a high-end gaming PC
- You need a 12V-2x6 connector for new GPUs
- You want a 10-year warranty for peace of mind
Skip if
- You have a small form factor case with tight clearances
- You need an ATX 3.0 unit for older builds
- You prefer a non-modular design for simplicity
Verdict: MSI MAG 850W Gold ATX 3.1 is a solid choice for gamers using modern GPUs that require the 12V-2x6 connector. It fits well in standard mid-tower cases where the 8.75-inch width and 12-inch length are acceptable.
MSI MPG 850W Gold ATX 3.1 Power Supply
Best for: Modern gaming PCs needing 12V-2x6 support
- Wattage
- 850W
- Efficiency Rating
- 80+ Gold
- Modularity
- Fully Modular
- ATX Version
- ATX 3.1
- PCIe Connector Type
- 12V-2x6
- Warranty
- 10 Year
View on Amazon: MSI MPG 850W Gold ATX 3.1 Power Supply Affiliate link
This is the MSI MPG A850G PCIE5, a fully modular 850W power supply built for modern gaming rigs. It carries an 80 PLUS Gold efficiency rating and supports the ATX 3.1 standard with native 12V-2x6 connectivity for next-gen graphics cards. The unit measures 5.91 by 5.91 by 3.39 inches and weighs 7.15 pounds. You get a 10-year warranty backed by Japanese 105°C capacitors for stable performance.
Pros
- 80 PLUS Gold efficiency certification
- Native 12V-2x6 PCIe connector
- ATX 3.1 and PCIe 5.1 support
- 10-year limited warranty
- Fully modular cable design
Cons
- Heavier at 7.15 pounds than the MAG A850GL
- Larger footprint at 5.91 inches in width and length
- No mention of fan noise levels or zero RPM mode
Good fit if
- You need native 12V-2x6 support for new GPUs
- You want a 10-year warranty for long-term reliability
- You are building a mid-tower gaming PC
Skip if
- You have a small form factor case with tight clearance
- You prioritize the lightest possible power supply weight
- You are building a system that does not need PCIe 5.1
Verdict: MSI MPG 850W Gold ATX offers essential modern connectivity and a long warranty for gamers, though its bulk and weight make it less ideal for compact builds than the MAG A850GL.
Specifications side by side
| Spec | MSI MAG 850W Fully Modular ATX Power Supply | MSI MPG 850W Gold ATX 3.1 Power Supply |
|---|---|---|
| Wattage | 850W | 850W |
| Efficiency Rating | 80+ Gold | 80+ Gold |
| Modularity | Fully Modular | Fully Modular |
| ATX Version | ATX 3.1 | ATX 3.1 |
| PCIe Connector Type | 12V-2x6 | 12V-2x6 |
| Warranty | 10 Year | 10 Year |
| Form Factor | Compact | Compact |
| PCIe Version | PCIe 5.1 | PCIe 5.1 |
| Recommended Use | Gaming | Gaming |
| Connector | 12V-2x6 Connector | 12V-2x6 Connector |
| Size | 850W (PCIE 5) | 850W |
| Dimensions | 12 × 8.75 × 4.92 inches | 5.91 × 5.91 × 3.39 inches |
| Weight | not stated | 7.15 pounds |
| Model | not stated | MPG A850G PCIE 5 |
Frequently asked questions
Does the MSI MAG 850W support PCIe 5.1 graphics cards?
Yes, the MSI MAG 850W Fully Modular supports PCIe 5.1. It includes a native 12V-2x6 connector, which is required for modern high-end GPUs. This makes it a solid choice for gamers using the latest graphics cards that rely on this specific power interface.
Is the MSI MPG 850W Gold fully modular?
Yes, the MSI MPG 850W Gold ATX is fully modular. You can detach all cables from the unit. This feature helps reduce clutter inside your case and simplifies cable management during installation, allowing for a cleaner build appearance.
What is the main physical difference between the two models?
The primary difference is size. The MSI MAG is a standard ATX unit measuring 12 inches long, 8.75 inches wide, and 4.92 inches high. The MSI MPG is much more compact, measuring only 5.91 inches square. The MPG fits better in smaller cases.
Can I use the MSI MPG 850W in a small form factor case?
Yes, the MSI MPG 850W is better suited for small form factor builds. Its compact dimensions of 5.91 inches square allow it to fit into mini-ITX or micro-ATX cases where space is tight. The larger MAG model may not fit these smaller enclosures.
Do both power supplies meet the ATX 3.1 standard?
Yes, both the MSI MAG and MSI MPG models comply with the ATX 3.1 standard. This ensures they meet current industry specifications for power delivery and compatibility with modern motherboards and components, providing reliable performance for your system.
Which model is heavier?
The MSI MPG 850W Gold weighs 7.15 pounds. The weight of the MSI MAG 850W is not specified in the available data. Generally, heavier units may feel more robust, but the MPG is significantly smaller in physical dimensions.