14 Best Msi ATX 3.1 PC Power Supplies, Compared
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Selecting the right MSI ATX 31 PC power supply ensures stable power delivery for demanding graphics cards. The MSI MAG 850W Fully Modular ATX Power Supply earns the top spot because its native 12V-2x6 connector and 80 Plus Gold efficiency deliver dependable performance for gaming builds.
This guide compares 14 models based strictly on the specifications published on their listings. It helps you choose the right wattage, efficiency level, and modular cabling design for your specific PC build.
Quick picks
The best fit for you
- You build a standard gaming rig needing 850W MSI MAG 850W Fully Modular ATX Power Supply It delivers 850W output, 80 Plus Gold efficiency, fully modular cabling, and a 12V-2x6 connector with a 10-year warranty.
- You operate a high-draw workstation demanding extreme power MSI MEG 1600W Titanium Power Supply It supplies 1600W capacity, 80 Plus Titanium efficiency, and ATX 3.1 compliance for power-dense configurations.
- You want a high-output unit for white builds MSI MAG 1000W White Modular Power Supply This white power supply provides 1000W output, 80 Plus Gold efficiency, and fully modular ATX 3.1 cabling.
- You assemble a mid-range PC with fixed wiring MSI MAG 650W Bronze ATX 3.1 Power Supply It offers 650W output, 80 Plus Bronze efficiency, non-modular wiring, and a 12V-2x6 connector backed by a 5-year warranty.
Our 14 picks
MSI MAG 850W Fully Modular ATX Power Supply
Best for: modern mid-to-high-end gaming rigs
- ATX Version
- ATX 3.1 (what this guide is about)
- Wattage
- 850W
- Efficiency Rating
- 80+ Gold
- Modularity
- Fully Modular
- PCIe Connector Type
- 12V-2x6
- Warranty
- 10 Year
This 850W ATX power supply delivers 80 Plus Gold efficiency and complies with the ATX 3.1 standard. It features a fully modular design, so you only attach the cables you need for your build. With its native 12V-2x6 PCIe 5.1 connector, it powers modern graphics cards without adapters. Backed by a 10-year warranty, it suits gaming setups that need reliable mid-to-high wattage support.
Pros
- 80 Plus Gold certified efficiency
- Native 12V-2x6 connector for PCIe 5.1 compatibility
- Fully modular cable layout
- 10-year warranty coverage
Cons
- 850W capacity limits extreme multi-component configurations
- Gold rating is lower than Platinum or Titanium alternatives
Good fit if
- You need an ATX 3.1 power supply with a dedicated 12V-2x6 connector.
- You want a fully modular 850W unit backed by a 10-year warranty.
Skip if
- You require 1000W or more output for heavy power loads.
- You prefer an 80 Plus Platinum or Titanium efficiency tier.
Verdict: MSI MAG 850W ATX 3.1 Power Supply is a solid mid-wattage choice for gaming systems requiring native PCIe 5.1 power delivery. Its fully modular cabling and 10-year warranty make it a dependable foundation for standard builds.
MSI MEG Ai1300P 1300W Platinum ATX 3.1 PSU
Best for: high-wattage gaming builds needing Platinum efficiency
- ATX Version
- ATX 3.1 (what this guide is about)
- Wattage
- 1300W
- Efficiency Rating
- 80 Plus Platinum
- Modularity
- Fully Modular
- PCIe Connector Type
- 12V-2x6
- Warranty
- 10 Year
The MSI MEG Ai1300P is a fully modular ATX power supply delivering 1300W of power with an 80 Plus Platinum efficiency rating. It features a native 12V-2x6 connector compatible with PCIe 5.1 graphics cards alongside ATX 3.1 compliance. Built with 100% Japanese 105°C capacitors and backed by a 10-year warranty, it suits your high-demand gaming setup if you run top-tier hardware requiring substantial overhead.
Pros
- 1300W output with 80 Plus Platinum efficiency
- Native 12V-2x6 connector supporting PCIe 5.1
- 100% Japanese 105°C capacitors
- Fully modular cable design
- 10-year warranty coverage
Cons
- Overkill capacity for mid-range hardware
- Requires a case that accommodates an 8.27-inch unit length
Good fit if
- You need 1300W of continuous power for high-draw hardware.
- You want 80 Plus Platinum efficiency to keep waste heat low.
- You require a native 12V-2x6 connection for modern GPUs.
Skip if
- You run a standard gaming rig that requires only 650W to 850W.
- You have a compact chassis with limited depth for the power supply.
Verdict: MSI MEG Ai1300P 1300W Platinum PSU pairs heavy-duty 1300W output with 80 Plus Platinum efficiency and ATX 3.1 compliance. It serves as a dependable power source for power-hungry hardware and multi-GPU configurations.
MSI MPG 850W Gold ATX 3.1 Power Supply
Best for: 850W ATX 3.1 gaming builds
- ATX Version
- ATX 3.1 (what this guide is about)
- Wattage
- 850W
- Efficiency Rating
- 80+ Gold
- Modularity
- Fully Modular
- PCIe Connector Type
- 12V-2x6
- Warranty
- 10 Year
The MSI MPG 850W Gold Power Supply gives you an 850W output built to ATX 3.1 and PCIe 5.1 standards. It includes a native 12V-2x6 cable for modern graphics hardware, along with a fully modular cable layout and 100% Japanese 105°C capacitors. Backed by 80 Plus Gold efficiency and a 10-year warranty, this unit suits your mid-to-high-tier gaming setup.
Pros
- ATX 3.1 and PCIe 5.1 compliant with native 12V-2x6 connector
- 100% Japanese 105°C capacitors
- Fully modular cable design
- 80 Plus Gold efficiency certification
- 10-year limited warranty
Cons
- 850W capacity limits headroom for extreme multi-GPU builds
- Efficiency capped at 80 Plus Gold rather than Platinum or Titanium
Good fit if
- You need an 850W ATX 3.1 supply with a dedicated 12V-2x6 cable.
- You want fully modular cabling and 105°C Japanese capacitors.
- You prefer long-term coverage via a 10-year warranty.
Skip if
- You need more than 850W for high-draw workstations or dual GPUs.
- You require 80 Plus Platinum or Titanium efficiency levels.
Verdict: MSI MPG 850W Gold Power Supply delivers ATX 3.1 compliance, 80 Plus Gold efficiency, and Japanese capacitors for modern gaming builds. It provides a reliable 850W foundation backed by a 10-year warranty.
MSI MAG 850W Gold Fully Modular PSU
Best for: ATX 3.1 gaming builds needing 850W
- ATX Version
- ATX 3.1 (what this guide is about)
- Wattage
- 850W
- Efficiency Rating
- 80 PLUS Gold
- Modularity
- Fully Modular
- PCIe Connector Type
- 12V-2x6
- Warranty
- 10 Year
The MSI MAG 850W Gold Power Supply delivers ATX 3.1 support and PCIe 5.1 compliance for modern gaming systems. You get 850W of power, an 80 Plus Gold efficiency rating, and a dedicated 12V-2x6 connector for current graphics cards. Its fully modular cabling keeps your build clean by letting you connect only the cables you need. It suits you if you want compliant hardware with a 10-year warranty.
Pros
- 80 Plus Gold efficiency rating
- ATX 3.1 and PCIe 5.1 compliance
- Dedicated 12V-2x6 power connector
- Fully modular cable setup
- 10-year limited warranty
Cons
- 850W capacity ceiling limits power for higher-wattage builds
- 80 Plus Gold rating provides lower efficiency than Platinum or Titanium units
Good fit if
- You need an ATX 3.1 power supply with a native 12V-2x6 connector.
- You want an 850W fully modular unit with 80 Plus Gold efficiency.
- You prefer the protection of a 10-year limited warranty.
Skip if
- You need more than 850W of total capacity for your hardware.
- You require 80 Plus Platinum or Titanium efficiency levels.
Verdict: MSI MAG 850W Gold Power Supply provides ATX 3.1 standard compliance, a 12V-2x6 connector, and fully modular cables for gaming rigs. It delivers solid 80 Plus Gold efficiency backed by a 10-year warranty.
MSI MPG 1250W Fully Modular Power Supply
Best for: high-draw setups needing dual 12V-2x6 power
- ATX Version
- ATX 3.1 (what this guide is about)
- Wattage
- 1250W
- Efficiency Rating
- 80+ Gold
- Modularity
- Fully Modular
- PCIe Connector Type
- 12V-2x6
- Warranty
- 10 Year
This MSI unit is a 1250-watt ATX 3.1 power supply built for power-demanding gaming rigs. It features two native 12V-2x6 connectors for PCIe 5.1 hardware alongside fully modular cabling to simplify cable routing. With an 80 Plus Gold efficiency rating, server-grade 105°C capacitors, and industrial protections, it delivers stable high-wattage power. You get ample headroom for demanding components and a 10-year warranty for long-term reliability.
Pros
- Dual native 12V-2x6 connectors for PCIe 5.1 hardware
- 1250W output with fully modular cable management
- 100% server-grade 105°C capacitors
- 10-year manufacturer warranty
Cons
- 80 Plus Gold efficiency rather than Platinum or Titanium
- Black finish only with no white option listed
Good fit if
- You need 1250W of power with dual native 12V-2x6 cables for high-draw hardware.
- You want fully modular cables to keep your PC build organized.
- You require industrial-level electrical protections and server-grade internal components.
Skip if
- You prefer higher efficiency certifications like 80 Plus Platinum or Titanium.
- You need a white power supply to match your PC chassis theme.
Verdict: MSI 1250W ATX 3.1 Gold Power Supply provides substantial 1250W capacity and dual 12V-2x6 connectors for high-end setups. Its fully modular design, server-grade capacitors, and 10-year warranty make it a dependable choice for power-heavy systems.
MSI MEG 1600W Titanium Power Supply
Best for: ultra-high-end multi-GPU workstations and rigs
- ATX Version
- ATX 3.1 (what this guide is about)
- Wattage
- 1600W
- Efficiency Rating
- 80+ Titanium
- Modularity
- Fully Modular
- PCIe Connector Type
- 12V-2x6
- Warranty
- 12 Year
This is a high-output 1600W ATX 3.1 power supply with an 80 Plus Titanium efficiency rating. It features dual native 12V-2x6 connectors for demanding multi-GPU configurations, all-Japanese 105°C capacitors, and full modularity to keep cable clutter minimal. You get comprehensive industrial-grade circuit protections and triple titanium efficiency certifications. It suits you if you run extreme multi-card workstations or top-tier gaming systems requiring massive power headroom and strict voltage stability.
Pros
- 1600W capacity with 80 Plus Titanium efficiency
- Dual native 12V-2x6 PCIe 5.1 connectors
- 100% Japanese 105°C capacitors
- Fully modular cable design
Cons
- Heavy at 6.52 pounds
- Large dimensions require ample chassis space
- Available only in black
Good fit if
- You need dual native 12V-2x6 connectors for high-end graphics hardware.
- You run a high-draw PC requiring up to 1600W of total capacity.
- You require Titanium-level efficiency with Japanese 105°C capacitors.
Skip if
- You build inside a compact case with tight power supply clearances.
- You run a standard single-GPU build with modest power demands.
Verdict: MSI MEG 1600W Titanium Power Supply delivers exceptional capacity and dual 12V-2x6 connectivity for high-draw hardware setups. Its top-tier efficiency and industrial protections make it a reliable choice for power-dense builds.
MSI MAG 850W Fully Modular Power Supply
Best for: compact ATX gaming builds needing 850W
- ATX Version
- ATX 3.1 (what this guide is about)
- Wattage
- 850W
- Efficiency Rating
- 80 PLUS Gold
- Modularity
- Fully Modular
- PCIe Connector Type
- 12V-2x6
- Fan Size
- 135 mm
This MSI unit provides 850 watts of power in a compact 150 mm by 150 mm ATX form factor. It meets ATX 3.1 and PCIe 5.1 standards, featuring a dedicated 12V-2x6 connector for modern graphics cards. The fully modular design lets you attach only the cables you need. It suits your build if you want 80 Plus Gold efficiency and reliable power protection inside standard or space-constrained cases.
Pros
- Native 12V-2x6 connector with ATX 3.1 and PCIe 5.1 support
- Compact 150 mm by 150 mm dimensions for easier case clearance
- Fully modular cable design
- 10-year warranty coverage
- 135 mm fluid-dynamic bearing fan
Cons
- 850W ceiling is unsuitable for multi-GPU or extreme-wattage rigs
- 80 Plus Gold efficiency falls short of Platinum or Titanium standards
Good fit if
- You need a compact ATX power supply to preserve cable space in your chassis.
- You run a modern graphics card that requires a dedicated 12V-2x6 cable.
- You want fully modular cables to simplify routing.
Skip if
- You need 1000 watts or higher for ultra-high-draw hardware.
- You require 80 Plus Platinum or Titanium efficiency levels.
Verdict: MSI 850W Gold Fully Modular Power Supply delivers up-to-date ATX 3.1 standards and modular cabling in a compact footprint. It provides balanced wattage and comprehensive circuit protection backed by a 10-year warranty.
MSI MAG 1000W White Modular Power Supply
Best for: 1000W white ATX 3.1 gaming builds
- ATX Version
- ATX 3.1 (what this guide is about)
- Wattage
- 1000W
- Efficiency Rating
- 80+ Gold
- Modularity
- Fully Modular
- PCIe Connector Type
- 12V-2x6
- Warranty
- 10 Year
This MSI 1000W power supply features an ATX 3.1 design with native PCIe 5.1 support. It delivers 80 PLUS Gold efficiency and includes a dedicated 12V-2x6 connector for NVIDIA GeForce RTX 40 series graphics cards. The unit uses flat, fully modular cables to simplify your cable routing. It suits your gaming build if you need high wattage, active PFC, and a 10-year warranty.
Pros
- ATX 3.1 and PCIe 5.1 ready with a 12V-2x6 connector
- 80 PLUS Gold certified efficiency
- Fully modular flat cables
- Includes a 10-year warranty
Cons
- 80 PLUS Gold efficiency rather than Platinum or Titanium
- Relatively heavy at over 7.5 pounds
Good fit if
- You need 1000W of power for an NVIDIA GeForce RTX 40 series graphics card.
- You want fully modular flat cables to streamline case cable management.
- You want a white ATX 3.1 unit backed by a 10-year warranty.
Skip if
- You require higher efficiency ratings such as 80 PLUS Platinum or Titanium.
- You run a lower-power system that does not require 1000W of capacity.
Verdict: MSI 1000W White ATX 3.1 Power Supply delivers high output, 80 PLUS Gold efficiency, and dedicated PCIe 5.1 support for modern graphics cards. It provides reliable modular cabling for demanding gaming systems.
MSI MAG 650W Bronze ATX 3.1 Power Supply
Best for: mid-range ATX 3.1 gaming PC builds
- ATX Version
- ATX 3.1 (what this guide is about)
- Wattage
- 650W
- Efficiency Rating
- 80 PLUS Bronze
- Modularity
- Non Modular
- PCIe Connector Type
- 12V-2x6
- Warranty
- 5 Year
The MSI MAG 650W Bronze Power Supply is an entry-level unit built for modern hardware. It delivers 650 watts of output with 80 Plus Bronze efficiency and ATX 3.1 compliance. You get a native PCIe 5.1 12V-2x6 cable rated for up to 450 watts, featuring a dual-color yellow connector to confirm full seating. Its non-modular design suits mainstream gaming builds where you need updated GPU power delivery without requiring modular cables.
Pros
- ATX 3.1 compliance supporting 2x total power excursion and 3x GPU excursion
- PCIe 5.1 native 12V-2x6 connector rated up to 450W
- Yellow-tipped 12V-2x6 connector for visual plug inspection
- 5-year manufacturer warranty
Cons
- Non-modular design leaves all cables permanently attached
- 80 Plus Bronze efficiency is lower than Gold or Platinum alternatives
- 650W capacity limits headroom for power-heavy graphics cards
Good fit if
- You are assembling a mid-range gaming setup requiring an ATX 3.1 power unit.
- You want a native 450W 12V-2x6 connector with visual seating verification.
- You have adequate space in your case to tuck away fixed, non-modular cables.
Skip if
- You want modular cabling to simplify internal cable management.
- You require an efficiency rating higher than 80 Plus Bronze.
- You need more than 650W of power for high-demand components.
Verdict: MSI MAG 650W Bronze Power Supply brings modern ATX 3.1 and PCIe 5.1 power delivery to mid-range systems. It serves as a dependable choice if you need a dedicated 450W graphics card cable and do not mind fixed wiring.
MSI MAG 750W Bronze Power Supply
Best for: budget gaming builds needing ATX 3.1 support
- ATX Version
- ATX 3.1 (what this guide is about)
- Wattage
- 750W
- Efficiency Rating
- 80 PLUS Bronze
- Modularity
- Non Modular
- PCIe Connector Type
- 12V-2x6
- Warranty
- 5 Year
The MSI MAG 750W Non-Modular Bronze Power Supply delivers 750 watts of power under ATX 3.1 standards. You get a native 450W-rated PCIe 5.1 12V-2x6 cable featuring a yellow connector tip to verify complete seating. The unit carries an 80 Plus Bronze efficiency certification and non-modular attached cabling. It suits you if you need modern ATX 3.1 power delivery for dedicated GPUs without the added complexity of modular cable management.
Pros
- Compliant with ATX 3.1 and PCIe CEM 5.1 standards
- Dedicated 12V-2x6 connector supports up to 450W GPU draw
- Yellow connector accent clearly shows proper insertion depth
- Comes with a 5-year warranty
Cons
- Non-modular design leaves all cables permanently attached
- 80 Plus Bronze efficiency rating is lower than Gold or Platinum alternatives
Good fit if
- You need an ATX 3.1 power supply with a 450W 12V-2x6 connection.
- You have room in your PC case to store unused fixed cables.
Skip if
- You want a fully modular power supply for cleaner cable routing.
- You require 80 Plus Gold or higher energy efficiency.
Verdict: MSI MAG 750W Non-Modular Bronze Power Supply provides essential ATX 3.1 support and a 450W 12V-2x6 connector at an entry-level efficiency rating. It gives you stable GPU power delivery while keeping cable configurations fixed.
MSI PRO 1000W 80 Plus Platinum Power Supply
Best for: high-efficiency modern gaming builds
- ATX Version
- ATX 3.1 (what this guide is about)
- Wattage
- 1000W
- Efficiency Rating
- 80+ Platinum
- Modularity
- Fully Modular
- PCIe Connector Type
- 12V-2x6
- Warranty
- 7 Years
This MSI 1000W ATX 3.1 power supply features 80 PLUS Platinum efficiency and a fully modular design. It provides a native 12V-2x6 cable capable of delivering up to 600W to PCIe 5.1 graphics cards. With its compact 150 mm length, LLC half-bridge topology, and complete suite of protections, it gives you high electrical efficiency in a standard chassis footprint. It suits high-demand gaming rigs needing stable power delivery.
Pros
- 80 PLUS Platinum certified for up to 92% efficiency
- Native 12V-2x6 connector delivers up to 600W for PCIe 5.1 hardware
- Compact 150 mm by 150 mm casing simplifies cable management
- Fully modular configuration with embossed jacket cables
Cons
- Includes only two SATA and peripheral cable runs
- Provides a single native 12V-2x6 connector
Good fit if
- You need 1000W of capacity with 80 PLUS Platinum efficiency.
- You run a modern PCIe 5.1 graphics card using a 12V-2x6 power connection.
- You need a compact 150 mm PSU body to preserve clearance inside your case.
Skip if
- You need more than two SATA or peripheral cable runs for storage drives.
- You require total system output exceeding 1000W.
Verdict: MSI 1000W Platinum ATX 3.1 Power Supply pairs high Platinum-rated efficiency with a compact 150 mm chassis and native 600W PCIe 5.1 support. It is a dependable choice for modern builds requiring clean modular cable routing.
MSI MAG 1200W Platinum Modular PSU
Best for: High-power gaming systems with PCIe 5.1 GPUs
- ATX Version
- ATX 3.1 (what this guide is about)
- Wattage
- 1200W
- Efficiency Rating
- 80+ Platinum
- Modularity
- Fully Modular
- PCIe Connector Type
- 12V-2x6
- Fan Size
- 135 mm
This MSI MAG power supply gives you 1200W of output with 80 Plus Platinum efficiency. Built to ATX 3.1 and PCIe 5.1 standards, it includes a native 12V-2x6 cable that supplies up to 600W for modern graphics cards. The unit also features GPU Safeguard current alerts and a 135 mm FDB fan in a 150 mm casing. It suits you if you need high wattage and high efficiency for demanding components.
Pros
- 80 Plus Platinum certified for up to 92% efficiency
- Native 12V-2x6 connector delivers up to 600W
- GPU Safeguard provides real-time current monitoring and alerts
- Compact 150 mm by 150 mm chassis with 135 mm FDB fan
- 10-year warranty coverage
Cons
- Includes only one dedicated 12V-2x6 cable
- Provides only three standard PCIe power cables in the box
Good fit if
- You need 1200W capacity with 80 Plus Platinum efficiency.
- You run a PCIe 5.1 graphics card using a 12V-2x6 connector.
- You want proactive current monitoring on the GPU power line.
Skip if
- You require dual 12V-2x6 cables for multiple high-end GPUs.
- You run a lower-draw system that does not need 1200W of power.
Verdict: MSI MAG 1200W Platinum ATX 3.1 Power Supply delivers high-wattage Platinum power with active GPU current protection for demanding gaming setups.
MSI MPG 1300W Titanium Modular PSU
Best for: dual-cable high-draw gaming and workstation builds
- ATX Version
- ATX 3.1 (what this guide is about)
- Wattage
- 1300W
- Efficiency Rating
- 80+ Titanium
- Modularity
- Fully Modular
- PCIe Connector Type
- 12V-2x6
- Fan Size
- 135 mm
This fully modular ATX 3.1 power supply gives you 1300W of output paired with 80 PLUS Titanium efficiency, reaching up to 94 percent. You get dual native 12V-2x6 connectors supplying up to 600W each for modern PCIe 5.1 graphics cards. With server-grade SiC MOSFETs and real-time GPU Safeguard+ alerts, it suits you if you run high-demand components and need peak electrical efficiency with early current warning protection.
Pros
- 80 PLUS Titanium certified with up to 94% efficiency
- Dual native 12V-2x6 connectors providing up to 600W each
- GPU Safeguard+ alerts for abnormal 12V-2x6 current status
- 135 mm fluid-dynamic bearing fan for cooling
Cons
- Heavy unit weighing 9.7 pounds
- Long 7.48-inch chassis dimension demands extra clearance
Good fit if
- You need up to 1300W of total output for flagship components.
- You plan to run hardware that requires dual native 12V-2x6 cables.
- You prioritize top-tier efficiency rated up to 94% via 80 PLUS Titanium.
Skip if
- You have a compact PC case with limited depth for power supplies.
- You only require moderate wattage in the 650W to 850W range.
Verdict: MSI MPG 1300W Titanium Modular PSU provides exceptional efficiency and dual high-draw GPU support for demanding ATX 3.1 builds. Its integrated current safeguards and server-grade internals make it a reliable centerpiece for power-heavy setups.
MSI MAG 650W Gold ATX 3.1 Power Supply
Best for: mid-range ATX 3.1 gaming builds
- ATX Version
- ATX 3.1 (what this guide is about)
- Wattage
- 650W
- Efficiency Rating
- 80 PLUS Gold
- Modularity
- Non-Modular
- Recommended Use
- Gaming
- Dimensions
- 11.4 × 7.68 × 4.49 inches
This MSI MAG unit gives you a 650W ATX 3.1 power supply with an 80 Plus Gold efficiency rating. It features a non-modular design, a single-rail configuration, and Full-Bridge LLC topology with DC-to-DC conversion. It handles power excursions up to 2x total and 3x GPU limits. If you want Gold-rated electrical efficiency for a mid-range ATX gaming build without detachable modular cables, this unit fits your setup.
Pros
- 80 Plus Gold certified efficiency
- ATX 3.1 compliant with 2x total and 3x GPU excursion headroom
- Full-Bridge, LLC, and DC-to-DC internal circuitry
- OVP, OCP, SCP, OPP, and OTP industrial safety protections
Cons
- Fixed non-modular cabling
- 650W capacity limits multi-component upgrade headroom
Good fit if
- You want an 80 Plus Gold unit that complies with ATX 3.1 power standards.
- You do not mind routing permanently fixed non-modular cables.
Skip if
- You need modular cables to simplify cable management.
- You run high-draw graphics cards requiring more than 650W.
Verdict: MSI MAG 650W Gold ATX 3.1 Power Supply delivers solid Gold efficiency and current ATX 3.1 compliance for mid-tier gaming systems. Its non-modular build keeps cabling fixed while providing complete internal component protection.
Specifications side by side
| Spec | MSI MAG 850W Fully Modular ATX Power Supply | MSI MEG Ai1300P 1300W Platinum ATX 3.1 PSU | MSI MPG 850W Gold ATX 3.1 Power Supply | MSI MAG 850W Gold Fully Modular PSU | MSI MPG 1250W Fully Modular Power Supply | MSI MEG 1600W Titanium Power Supply | MSI MAG 850W Fully Modular Power Supply | MSI MAG 1000W White Modular Power Supply | MSI MAG 650W Bronze ATX 3.1 Power Supply | MSI MAG 750W Bronze Power Supply | MSI PRO 1000W 80 Plus Platinum Power Supply | MSI MAG 1200W Platinum Modular PSU | MSI MPG 1300W Titanium Modular PSU | MSI MAG 650W Gold ATX 3.1 Power Supply |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wattage | 850W | 1300W | 850W | 850W | 1250W | 1600W | 850W | 1000W | 650W | 750W | 1000W | 1200W | 1300W | 650W |
| Efficiency Rating | 80+ Gold | 80 Plus Platinum | 80+ Gold | 80 PLUS Gold | 80+ Gold | 80+ Titanium | 80 PLUS Gold | 80+ Gold | 80 PLUS Bronze | 80 PLUS Bronze | 80+ Platinum | 80+ Platinum | 80+ Titanium | 80 PLUS Gold |
| Modularity | Fully Modular | Fully Modular | Fully Modular | Fully Modular | Fully Modular | Fully Modular | Fully Modular | Fully Modular | Non Modular | Non Modular | Fully Modular | Fully Modular | Fully Modular | Non-Modular |
| ATX Version | ATX 3.1 | ATX 3.1, ATX 3.0 | ATX 3.1 | ATX 3.1 | ATX 3.1 | ATX 3.1 | ATX 3.1 | ATX 3.1 | ATX 3.1 | ATX 3.1 | ATX 3.1 | ATX 3.1 | ATX 3.1 | ATX 3.1 |
| PCIe Connector Type | 12V-2x6 | 12V-2x6 | 12V-2x6 | 12V-2x6 | 12V-2x6 | 12V-2x6 | 12V-2x6 | 12V-2x6 | 12V-2x6 | 12V-2x6 | 12V-2x6 | 12V-2x6 | 12V-2x6 | not specified |
| Fan Size | not specified | not specified | not specified | not specified | not specified | not specified | 135 mm | not specified | not specified | not specified | not specified | 135 mm | 135 mm | not specified |
| Warranty | 10 Year | 10 Year | 10 Year | 10 Year | 10 Year | 12 Year | 10 Year | 10 Year | 5 Year | 5 Year | 7 Years | 10 Years | 12 Years | not specified |
| Form Factor | ATX | ATX | ATX | ATX | ATX | ATX | ATX | ATX | ATX | ATX | ATX | ATX | ATX | ATX |
| PCIe Version | PCIe 5.1 | PCIe 5.1 | PCIe 5.1 | PCIe 5.1 | PCIe 5.1 | PCIe 5.1 | PCIe 5.1 | PCIe 5.1 | PCIe 5.1 | PCIe 5.1 | PCIe 5.1 | PCIe 5.1 | PCIe 5.1 | not specified |
| Recommended Use | Gaming | Gaming | Gaming | Gaming | Gaming | Gaming | Gaming | Gaming | Gaming | Gaming | Gaming | Gaming | Gaming | Gaming |
| Connector | 12V-2x6 Connector | 12V-2x6 Connector | 12V-2x6 Connector | 12V-2x6 Connector | 12V-2x6 Connector | 12V-2x6 Connector | 12V-2x6 Connector | 12V-2x6 Connector | 12V-2x6 Connector | 12V-2x6 Connector | 12V-2x6 Connector | 12V-2x6 Connector | 12V-2x6 Connector | not specified |
| Size | 850W (PCIE 5) | 1300W | 850W | 850W (PCIE 5) | 1250W | not specified | 850 W | not specified | not specified | 11.42"L x 8.11"W x 4.96"H (Pack of 1) | not specified | not specified | 3.4" x 7.5" x 5.9" | not specified |
| Dimensions | 12 × 8.75 × 4.92 inches | 8.27 × 6.18 × 12.9 inches | 5.91 × 5.91 × 3.39 inches | 12 × 8.75 × 4.92 inches | 11.5 × 9.5 × 5.4 inches | 11.5 × 9.5 × 5.4 inches | 11.5 × 9.25 × 5.08 inches | 11.5 × 9.25 × 5.08 inches | 9.29 × 7.2 × 4.13 inches | 11.4 × 8.11 × 4.96 inches | 11.8 × 7.48 × 4.33 inches | 11.9 × 8.86 × 5.08 inches | 5.9 × 7.48 × 3.4 inches | 11.4 × 7.68 × 4.49 inches |
| Weight | not specified | 3.31 pounds | 7.15 pounds | not specified | not specified | 6.52 pounds | 6.75 pounds | 7.54 pounds | 4.63 pounds | 4.12 pounds | 6 pounds | not specified | 9.7 pounds | not specified |
| Model | not specified | 306-7ZP4A11-CE0 | MPG A850G PCIE 5 | MAG A850GL PCIE5 | MPG A1250GS PCIE5 | MEGAi1600TPCIE5 | MAG A850GLS PCIE5 | MAG A1000GL PCIE5 White | MAG A650BN PCIE5 III | MAG A750BN PCIE5 III | not specified | MAGA1200PLSPCIE5 | MPGAI1300TSPCIE5 | MAG A650GN II |
| Color | not specified | not specified | not specified | not specified | Black | Black | not specified | not specified | Multicolor | Multicolor | not specified | Multicolor | Black | not specified |
If you need proper clearance for longer power supplies, verify chassis dimensions and compartment layouts among the best ATX PC cases.
Choosing the Right MSI ATX 3.1 Power Supply
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Match Total Wattage Needs
Calculate the total power draw of your graphics card and processor before choosing a unit. MSI ATX 3.1 supplies in this guide span from 650W up to 1600W. Mid-tier setups typically operate reliably on 850W models like the MSI MAG 850W Gold Fully Modular PSU, while high-draw setups with overclocked components or multiple components require 1200W or more. Choosing adequate headroom prevents shutdowns during peak operational spikes and keeps the unit operating within its optimal power delivery curve.
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Verify GPU Connector Ratings
Check the specific wattage rating of the bundled 12V-2x6 cable to match your graphics card. Certain lower-wattage units, such as the MSI MAG 750W Bronze Power Supply, provide a dedicated 450W rated connector. Higher-wattage models supply 600W cables or dual connectors to power demanding modern cards. Review your GPU manufacturer specifications for peak power draw before deciding. Matching the rated cable capacity ensures safe power delivery without stressing the connection pins or causing unexpected throttle events during sustained gaming loads.
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Evaluate Energy Efficiency Ratings
Review the 80 Plus certification level to balance operational energy waste against your daily runtime. MSI offers Bronze, Gold, Platinum, and Titanium tiers across its ATX 3.1 catalog. Bronze models suit occasional gaming, whereas Gold units provide a balanced efficiency benchmark for everyday usage. If your system runs heavy computational tasks continuously, choosing an 80 Plus Platinum unit like the MSI PRO 1000W 80 Plus Platinum Power Supply lowers wasted heat inside the chassis and cuts thermal load on internal cooling fans.
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Measure Chassis Installation Clearance
Measure your computer case power supply chamber before purchasing, focusing primarily on length. While all listed models share the standard ATX form factor width and height, length varies significantly between wattage tiers. Compact enclosures benefit from standard 150 mm depth options like the MSI MPG 850W Gold ATX 3.1 Power Supply, which leaves ample room for cable bundles. Longer high-wattage units reduce clearance adjacent to bottom drive cages. Verify your case clearance specifications to ensure smooth installation and unrestricted airflow.
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Compare Manufacturer Warranty Periods
Check the warranty duration listed in the specifications to gauge long-term component durability. MSI provides 5-year coverage on entry models, such as the MSI MAG 650W Bronze ATX 3.1 Power Supply, while higher-tier Gold and Platinum units include a 10-year warranty. Longer warranty periods reflect server-grade components and high-grade Japanese capacitors designed for sustained operation. If you plan to retain your power supply across multiple hardware upgrades, prioritize models with 10-year manufacturer protection to safeguard your overall investment over time.
Frequently asked questions
What connector do MSI ATX 3.1 power supplies use for modern graphics cards?
MSI ATX 3.1 power supplies feature native 12V-2x6 connectors to power modern PCIe 5.1 graphics cards. These cables deliver power directly through a single dedicated line. Models such as the MSI MAG 650W Bronze supply up to 450W via this connector, while units like the MSI PRO 1000W Platinum provide up to 600W PCIe 5.1 support without needing multi-cable adapters.
Are all MSI ATX 3.1 power supplies fully modular?
No, MSI offers both fully modular and non-modular ATX 3.1 units across its lineups. The MAG A650BN PCIE5 III, MAG A750BN PCIE5 III, and MAG A650GN II use fixed, non-modular wiring where all cables remain attached. If you prefer attaching only the cables your build requires, options like the MSI MAG 850W or MSI MPG 850W provide fully modular configurations.
Which MSI ATX 3.1 power supplies support dual 12V-2x6 connections?
High-capacity models like the MSI MPG 1250W, MSI MEG 1600W Titanium, and MSI MPG 1300W Titanium include dual 12V-2x6 connectors. These units are engineered for high-draw hardware configurations and multi-GPU setups that demand more than a single PCIe 5.1 cable. They also integrate heavy-duty components such as server-grade capacitors to maintain stability under demanding processing loads.
What efficiency levels are available across MSI ATX 3.1 power supplies?
MSI produces ATX 3.1 power supplies across four main efficiency tiers: 80 Plus Bronze, Gold, Platinum, and Titanium. Models like the MAG A650BN PCIE5 III carry an entry-level Bronze certification, while the MAG and MPG 850W units feature 80 Plus Gold ratings. High-end choices like the MEG Ai1300P offer Platinum efficiency, and the MEG 1600W reaches 80 Plus Titanium efficiency.
Does MSI offer white ATX 3.1 power supplies for themed builds?
Yes, MSI provides color-matched options like the MSI MAG 1000W White Modular Power Supply. This model gives you 80 Plus Gold efficiency, ATX 3.1 compliance, and native PCIe 5.1 power delivery in a white chassis. It features a fully modular layout with dedicated 12V-2x6 cabling, making it suitable if you are assembling a color-coordinated gaming rig.
What internal components does MSI use to handle electrical reliability in ATX 3.1 units?
MSI incorporates high-grade internal hardware to manage steady current across its ATX 3.1 lineup. For example, the MSI MPG 850W Gold uses Japanese capacitors for stable performance, while the MPG 1250W and MPG 1300W Titanium feature server-grade capacitors and integrated current safeguards. These components help maintain clean voltage delivery and protect your connected hardware during intensive operations.
What chassis dimensions should you expect from MSI ATX 3.1 power supplies?
All listed MSI ATX 3.1 power supplies follow standard ATX mounting specifications, though physical enclosure dimensions vary by wattage and series. The MSI MPG 850W measures 5.91 inches long by 5.91 inches wide, while the MSI PRO 1000W Platinum uses a compact 150 mm chassis length. Higher-capacity models like the MPG 1300W Titanium feature different casing layouts to accommodate larger components.