Msi MAG 850W Fully Modular vs Msi MAG ATX 3.0 Modular: Spec Comparison
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You are looking at the msi mag a850gl pcie5 vs mag a750gl pcie 5 comparison. Both units are fully modular ATX power supplies rated for 80 Plus Gold efficiency. They share a focus on gaming performance and modern connectivity. The main difference lies in their power output and ATX version compliance. One offers higher wattage and a newer standard, while the other provides a slightly smaller footprint with ATX 3.0 support. You need to weigh these specs against your system requirements.
Key differences
| Aspect | MSI MAG 850W Fully Modular ATX Power Supply | MSI MAG ATX 3.0 Modular Power Supply |
|---|---|---|
| Wattage | 850W | 750W |
| ATX Version | ATX 3.1 | ATX 3.0 |
| PCIe Connector | 12V-2x6 | PCIe 5.0 |
| Dimensions | 8.75 x 4.92 x 12 inches | 7.9 x 3.9 x 11.8 inches |
| Warranty | 10 Year | not listed |
Which one should you choose?
Choose MSI MAG 850W Fully Modular ATX Power Supply if
- You need extra power headroom for high-end graphics cards.
- You want the latest ATX 3.1 and PCIe 5.1 readiness.
- You prefer a longer manufacturer warranty period.
Choose MSI MAG ATX 3.0 Modular Power Supply if
- You have a smaller case with tighter clearance constraints.
- You are building a system that fits within 750W limits.
- You want a standard ATX 3.0 configuration.
Verdict: Choose the A850GL if you require higher wattage and the newest ATX 3.1 standard for future-proofing. Select the A750GL if your build has lower power demands or you need a physically smaller unit for compact cases. Both deliver efficient gold-tier performance for gaming.
MSI MAG 850W vs 750W Specs
Wattage and Power
The MSI MAG A850GL PCIE5 delivers 850 watts of continuous power. This higher output suits systems with high-end graphics cards or future upgrades. The MSI MAG ATX 3.0 Modular provides 750 watts. This rating is sufficient for most mid-range to high-end gaming builds. You must choose based on your GPU and CPU power draw. If your system requires more than 750 watts, the A850GL is the only option. The extra 100 watts offers headroom for overclocking or adding more components without stressing the unit.
ATX Version
The A850GL supports the newer ATX 3.1 standard. This version refines power delivery requirements and compatibility for the latest hardware. The A750GL adheres to the ATX 3.0 specification. While still modern and compatible with current PCIe 5.0 standards, it lacks the specific updates found in ATX 3.1. For most users, both versions work well with today’s components. However, if you want the most current standard for long-term compatibility, the A850GL has the advantage. It ensures you are using the latest industry guidelines for power supply design.
PCIe Connector Type
Both units include native connectors for modern graphics cards. The A850GL features the 12V-2x6 connector, which is part of the PCIe 5.1 readiness. This connector is designed for safer and more reliable power delivery to high-draw GPUs. The A750GL includes a native PCIe 5.0 connector. It also supports NVIDIA GeForce RTX 40 Series cards directly. Both connectors eliminate the need for adapter cables in many cases. The A850GL’s 12V-2x6 is the newer iteration, but both provide direct power without adapters.
Physical Dimensions
Size matters for fitting into your computer case. The A850GL measures 8.75 inches in width and 12 inches in length. It is slightly wider but shorter in length than the A750GL. The A750GL is narrower at 7.9 inches wide and 11.8 inches long. Its compact width may fit better in smaller cases or tighter layouts. The A750GL also lists a weight of 3.97 pounds. The A850GL does not list its weight. If case space is tight, the narrower A750GL might be easier to install.
Efficiency Rating
Both power supplies carry the 80 Plus Gold certification. This means they both convert at least 90% of AC power to DC power at typical loads. High efficiency reduces heat generation and lowers electricity costs over time. Since both units share this exact rating, there is no difference in their energy performance. You will get similar efficiency benefits from either model. The choice between them will not be driven by efficiency, as both meet the same high standard for power conversion.
Modularity
Both models are fully modular. This means you can connect only the cables you need, reducing clutter inside your case. The A750GL features flat cables, which can make cable management easier in tight spaces. The A850GL is also fully modular but does not specify cable shape. Fully modular designs allow for cleaner builds and better airflow. Since both offer this feature, you can manage your cables similarly with either unit. The flat cables on the A750GL may offer a slight practical advantage for routing.
Warranty Coverage
The A850GL comes with a 10-year warranty. This provides long-term protection for your investment. The A750GL data does not explicitly state its warranty length in the provided specifications. It is sold as a renewed item, which may affect warranty terms. The A850GL’s 10-year coverage is a clear advantage if you want guaranteed support for a decade. A longer warranty often reflects manufacturer confidence in component quality. You should verify the warranty details for the renewed A750GL before purchasing.
Which MSI MAG PSU suits you best
Users needing maximum power headroom
The MSI MAG A850GL PCIE5 offers 850 watts of continuous power. This higher output is ideal for systems with high-end graphics cards or those planning future upgrades. The extra 100 watts provides a buffer for peak loads, ensuring stable performance under heavy gaming or rendering workloads without stressing the unit.
Owners of RTX 40 series cards
The MSI MAG ATX 3.0 Modular features native PCIe 5.0 compatibility. It supports NVIDIA GeForce RTX 40 series graphics cards directly. The 750-watt rating is sufficient for most modern gaming builds. This unit includes flat cables and a 120mm fan, providing a clean look and reliable cooling for standard high-performance setups.
Those prioritizing long-term warranty coverage
The MSI MAG A850GL PCIE5 comes with a 10-year warranty. This extended coverage offers greater peace of mind for long-term use. The ATX 3.1 standard ensures compatibility with the latest hardware trends. Choosing this model means you are backed by a longer manufacturer commitment for your power supply investment.
The products compared
MSI MAG 850W Fully Modular ATX Power Supply
Best for: Spacious cases needing 850W power
- 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
The MSI MAG A850GL PCIE5 is a fully modular 850W power supply built for gaming systems. It carries an 80 Plus Gold efficiency rating and supports the latest ATX 3.1 and PCIe 5.1 standards. The unit features a 12V-2x6 connector for modern graphics cards. It measures 12 inches in length. This model is suitable for users needing high wattage with a 10-year warranty.
Pros
- 850W output capacity
- 10-year warranty coverage
- ATX 3.1 standard support
- 80 Plus Gold efficiency
Cons
- 12-inch length may not fit small cases
- 8.75-inch width is wider than standard
- No mention of fan noise levels
Good fit if
- You need 850W for high-end GPUs
- You want ATX 3.1 compatibility
- You prefer fully modular cables
Skip if
- You have a small form factor case
- You require 1000W or more power
- You need silent operation guarantees
Verdict: MSI MAG A850GL 850W ATX 3.1 fits gamers with spacious cases who need reliable 850W power and modern connectivity standards.
MSI MAG ATX 3.0 Modular Power Supply
Best for: RTX 40 series gaming builds needing ATX 3.0
- Efficiency Rating
- 80 Plus Gold
- Modularity
- Full Modular
- ATX Version
- ATX 3.0
- PCIe Connector Type
- PCIe 5.0
- Fan Size
- 120mm
- Recommended Use
- Gaming
View on Amazon: MSI MAG ATX 3.0 Modular Power Supply Affiliate link
This MSI MAG A750GL is a fully modular power supply with ATX 3.0 support and native PCIe 5.0 connectors. It holds 80 Plus Gold certification for high efficiency and includes active PFC. The unit measures 11.8 by 7.9 by 3.9 inches and weighs 3.97 pounds. It suits gamers using NVIDIA GeForce RTX 40 series cards who need reliable power delivery and modern cable management.
Pros
- ATX 3.0 compatible with native PCIe 5.0 connector
- 80 Plus Gold certified efficiency
- Full modular design with flat cables
- Supports NVIDIA GeForce RTX 40 series graphics
Cons
- Lower 750W output compared to the 850W competitor
- Larger 11.8-inch length may not fit small cases
- Renewed condition rather than new
Good fit if
- You need ATX 3.0 compatibility for modern GPUs
- You prefer fully modular cable management
- You use NVIDIA GeForce RTX 40 series cards
Skip if
- You require 850W or higher power output
- You need a brand-new unit instead of renewed
- You have a case with strict length limits under 11.8 inches
Verdict: MSI MAG A750GL 750W ATX 3.0 fits users who prioritize ATX 3.0 standards and Gold efficiency over maximum wattage. It is a solid option for RTX 40 series builds where 750W is sufficient.
Specifications side by side
| Spec | MSI MAG 850W Fully Modular ATX Power Supply | MSI MAG ATX 3.0 Modular Power Supply |
|---|---|---|
| Wattage | 850W | not stated |
| Efficiency Rating | 80+ Gold | 80 Plus Gold |
| Modularity | Fully Modular | Full Modular |
| ATX Version | ATX 3.1 | ATX 3.0 |
| PCIe Connector Type | 12V-2x6 | PCIe 5.0 |
| Fan Size | not stated | 120mm |
| Warranty | 10 Year | not stated |
| Form Factor | Compact | ATX |
| PCIe Version | PCIe 5.1 | not stated |
| Recommended Use | Gaming | Gaming |
| Connector | 12V-2x6 Connector | not stated |
| Dimensions | 12 × 8.75 × 4.92 inches | 11.8 × 7.9 × 3.9 inches |
| Weight | not stated | 3.97 pounds |
| Size | 850W (PCIE 5) | not stated |
Frequently asked questions
Is the MSI MAG A850GL compatible with PCIe 5.0 graphics cards?
Yes, the MSI MAG A850GL supports modern GPU standards. It features ATX 3.1 certification and includes a native 12V-2x6 connector. This design allows you to connect PCIe 5.0 compatible cards directly without needing extra adapters. The unit is optimized for gaming builds requiring reliable power delivery.
Does the MSI MAG ATX 3.0 Modular have an ATX 3.1 certification?
No, this model follows the ATX 3.0 standard. The A850GL version upgrades to ATX 3.1 for newer compatibility. Both units offer 80 Plus Gold efficiency and fully modular cables. If you need the latest ATX specification, the 850W model is the correct choice for your build.
Can the 750W unit fit in small form factor cases?
The 750W model measures 7.9 inches wide and 3.9 inches high. These dimensions are slightly smaller than the 850W version. The 850W unit is 8.75 inches wide and 4.92 inches high. You should check your case specifications to ensure the 750W unit fits your available space.
Which power supply is better for an RTX 40 series build?
Both units are suitable for RTX 40 series gaming builds. The 750W model is explicitly noted as a solid option for these systems. The 850W model provides extra headroom for future upgrades or higher-end components. Choose based on whether you need 750W or 850W for your specific GPU.
Are both power supplies fully modular?
Yes, both models are fully modular. You can detach all cables to reduce clutter inside your case. This feature helps with cable management and improves airflow. Both units share this design trait along with 80 Plus Gold efficiency ratings for reliable power conversion.
What is the weight difference between the two units?
The MSI MAG ATX 3.0 Modular weighs 3.97 pounds. The weight for the 850W model is not listed in the provided specifications. You can expect a slight difference due to the higher wattage capacity. Check the packaging details for the exact weight of the 850W unit if needed.