15 Best Pcie 5.1 PC Power Supplies, Compared
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Choosing the right pcie 51 PC power supply ensures your system handles modern graphics hardware safely and efficiently. We compared 15 models based strictly on the specifications published on their official product listings. The MSI MAG 850W Fully Modular ATX Power Supply takes the top spot because it combines ATX 3.1 compliance, an 80 Plus Gold efficiency rating, and a dedicated 12V-2x6 connector with a 10-year warranty.
This guide helps you decide which unit matches your case dimensions, power requirements, and connector needs.
Quick picks
The best fit for you
- You want a balanced ATX gaming power supply MSI MAG 850W Fully Modular ATX Power Supply It provides 850W output, ATX 3.1 compliance, 80 Plus Gold efficiency, and a 12V-2x6 connector with a 10-year warranty.
- You build a compact mini-ITX desktop PC Cooler Master V750 SFX Gold PCIe 5.1 PSU Its SFX form factor provides 750W of power and PCIe 5.1 connectivity for space-limited cases.
- You need maximum wattage and high efficiency MSI MEG Ai1300P 1300W Platinum ATX 3.1 PSU It supplies 1300W of capacity with an 80 Plus Platinum rating and a native 12V-2x6 connector.
- You are assembling an all-white desktop build Corsair RM850x Shift 850W White ATX Power Supply Its white enclosure delivers 850W capacity with ATX 3.1 support and 80 Plus Gold efficiency.
Our 15 picks
MSI MAG 850W Fully Modular ATX Power Supply
Best for: PCIe 5.1 ATX gaming builds
- PCIe Version
- PCIe 5.1
- Wattage
- 850W
- Efficiency Rating
- 80+ Gold
- Modularity
- Fully Modular
- ATX Version
- ATX 3.1
- PCIe Connector Type
- 12V-2x6
View on Amazon: MSI MAG 850W Fully Modular ATX Power Supply (paid link)
You get an 850W ATX power supply built to the ATX 3.1 and PCIe 5.1 standards. It includes a dedicated 12V-2x6 connector for modern graphics cards and fully modular cabling to keep your case tidy. Rated for 80 Plus Gold efficiency and backed by a 10-year warranty, it suits you if you want a reliable power unit for a standard gaming build without excess clutter.
Pros
- Native PCIe 5.1 support with a 12V-2x6 connector
- ATX 3.1 specification compliance
- Fully modular cable design
- 10-year warranty coverage
Cons
- Output capped at 850W
- 80 Plus Gold efficiency rather than Platinum or Titanium
Good fit if
- You need a native 12V-2x6 connector matching PCIe 5.1 and ATX 3.1 standards.
- You want fully modular cabling for a gaming system drawing up to 850W.
- You prefer a power supply backed by a 10-year warranty.
Skip if
- You need more than 850W of power for high-draw hardware setups.
- You require an efficiency rating higher than 80 Plus Gold.
Verdict: MSI MAG 850W Gold PCIe 5.1 Power Supply delivers modern ATX 3.1 and PCIe 5.1 compliance with fully modular cables and a 10-year warranty. It provides dependable 80 Plus Gold power for mainstream gaming configurations.
Corsair RM850x 850W Fully Modular ATX 3.1 PSU
Best for: ATX systems needing PCIe 5.1 power
- PCIe Version
- PCIe 5.1
- Wattage
- 850W
- Efficiency Rating
- Cybenetics Gold
- Modularity
- Fully Modular
- ATX Version
- ATX 3.1
- PCIe Connector Type
- 12V-2x6
View on Amazon: Corsair RM850x 850W Fully Modular ATX 3.1 PSU (paid link)
This ATX power supply delivers 850W of power with PCIe 5.1 and ATX 3.1 support. Its fully modular design lets you attach only the cables you need for your system, reducing internal clutter. The unit includes a dedicated 12V-2x6 connector for modern graphics cards. It suits you if you are assembling a standard ATX PC build that requires compliant power delivery and tidy cable management in a black casing.
Pros
- Native 12V-2x6 connector for PCIe 5.1 components
- Fully modular cable system
- Compliant with ATX 3.1 standards
- 850W total output capacity
Cons
- 850W capacity limits headroom for dual high-draw hardware
- Full ATX dimensions exclude small form factor cases
Good fit if
- You build inside a standard ATX enclosure.
- You use graphics cards requiring a 12V-2x6 PCIe 5.1 connector.
- You want a fully modular setup with detachable cables.
Skip if
- You need more than 850W for extreme power hardware.
- You require an SFX or compact small form factor unit.
Verdict: Corsair RM850x 850W Modular Power Supply provides ATX 3.1 compliance and PCIe 5.1 power for standard desktop chassis. Its fully modular cabling keeps your system neat and organized.
Corsair RM1000x 1000W ATX 3.1 PSU
Best for: high-power ATX builds needing PCIe 5.1
- PCIe Version
- PCIe 5.1
- Wattage
- 1000W
- Efficiency Rating
- Cybenetics Gold
- Modularity
- Fully Modular
- ATX Version
- ATX 3.1
- PCIe Connector Type
- 12V-2x6
View on Amazon: Corsair RM1000x 1000W ATX 3.1 PSU (paid link)
The Corsair RM1000x is a 1000W ATX power supply designed for modern hardware. It features ATX 3.1 compliance and native PCIe 5.1 support with a dedicated 12V-2x6 connector. The fully modular design allows you to connect only the cables you need for your build. If you require high wattage and modern GPU power connections in a standard ATX enclosure, this black power supply delivers the necessary capacity.
Pros
- Delivers 1000W power output
- Complies with ATX 3.1 specifications
- Provides native PCIe 5.1 connectivity via a 12V-2x6 connector
- Fully modular cable system simplifies installation
Cons
- Standard ATX dimensions do not fit small-form-factor SFX cases
- Weighs 6.88 pounds
Good fit if
- You need 1000W of power for high-draw hardware.
- You require ATX 3.1 and PCIe 5.1 support with a 12V-2x6 connector.
- You want a fully modular power supply to minimize excess cabling.
Skip if
- You build in an SFX-only compact chassis.
- You need a white-colored unit to match your system theme.
Verdict: Corsair RM1000x 1000W Fully Modular PSU provides 1000W of capacity with native ATX 3.1 and PCIe 5.1 connectivity. Its fully modular layout and standard ATX form factor make it a solid option for high-load systems.
Corsair RM750x Shift White 750W ATX Power Supply
Best for: 750W builds needing side cable access
- PCIe Version
- PCIe 5.1
- Wattage
- 750W
- Efficiency Rating
- 80 Plus Gold
- Modularity
- Fully Modular
- ATX Version
- ATX 3.1
- Fan Size
- 140mm
View on Amazon: Corsair RM750x Shift White 750W ATX Power Supply (paid link)
The Corsair RM750x Shift 750W Power Supply delivers ATX 3.1 compliance and native PCIe 5.1 support for modern hardware. You get an 80 Plus Gold efficiency rating, 100% 105°C Japanese electrolytic capacitors, and a 140mm fluid dynamic bearing fan with Zero RPM mode. Side-mounted micro-fit connections change cable routing access. It suits you if you build a system requiring clean side access and 750W power.
Pros
- ATX 3.1 certified with native PCIe 5.1 support
- Side-mounted modular interface simplifies cable routing
- 100% 105°C-rated Japanese electrolytic capacitors
- 140mm fluid dynamic bearing fan with Zero RPM mode
Cons
- 750W total output limits headroom for high-draw hardware
- Side-facing connectors require dedicated clearance beside the PSU bay
- Uses proprietary Corsair Type 5 micro-fit cables
Good fit if
- You need 750W output with PCIe 5.1 and ATX 3.1 specifications.
- You want side-facing ports for easier modular cable connectivity.
- You prefer a white power supply chassis with 80 Plus Gold efficiency.
Skip if
- You need more than 750W capacity for power-hungry hardware.
- You use a PC case lacking side clearance behind the power supply bay.
Verdict: Corsair RM750x Shift 750W Power Supply provides ATX 3.1 and PCIe 5.1 compliance with innovative side-mounted cabling. It is a solid 750W choice if your PC case accommodates side modular ports.
Corsair RM850x Shift 850W White ATX Power Supply
Best for: White ATX builds needing 850W PCIe 5.1
- PCIe Version
- PCIe 5.1
- Wattage
- 850W
- Efficiency Rating
- 80 Plus Gold
- Modularity
- Fully Modular
- ATX Version
- ATX 3.1
- PCIe Connector Type
- PCIe 5.1
View on Amazon: Corsair RM850x Shift 850W White ATX Power Supply (paid link)
The Corsair RM850x Shift is an 850W fully modular ATX power supply built to the ATX 3.1 and PCIe 5.1 standards. It carries an 80 Plus Gold efficiency certification, weighs 3.75 pounds, and measures 6.3 inches in length. It features Zero RPM operation and comes in a white finish. This unit suits you if you need an 850W power supply for a white build requiring current PCIe 5.1 graphics hardware connectivity.
Pros
- 850W capacity with ATX 3.1 and PCIe 5.1 support
- 80 Plus Gold efficiency rating
- Fully modular cabling design
- Zero RPM fan mode operation
- White exterior finish
Cons
- 850W capacity limits total power compared to 1000W or higher models
- ATX dimensions do not fit compact SFX-only enclosures
Good fit if
- You need an 850W power supply compatible with PCIe 5.1 and ATX 3.1.
- You are assembling a white-themed desktop PC build.
- You want fully modular cables and a Zero RPM cooling mode.
Skip if
- You need more than 850W of power for high-draw hardware.
- You require an SFX form-factor unit for a small-chassis build.
Verdict: Corsair RM850x Shift 850W Power Supply delivers ATX 3.1 compliance and PCIe 5.1 compatibility with 80 Plus Gold efficiency. It suits builds needing 850W capacity in a white fully modular form factor.
Segotep 850W ATX 3.1 Gold Power Supply
Best for: budget-friendly ATX 3.1 and PCIe 5.1 builds
- PCIe Version
- PCIe 5.1
- Wattage
- 850W
- Efficiency Rating
- 80 Plus Gold
- Modularity
- Fully Modular
- ATX Version
- ATX 3.1
- PCIe Connector Type
- 12VHPWR
View on Amazon: Segotep 850W ATX 3.1 Gold Power Supply (paid link)
The Segotep 850W Gold Modular Power Supply gives you ATX 3.1 compliance and native PCIe 5.1 support in a standard ATX form factor. It delivers 850 watts of output with an 80 Plus Gold efficiency rating. The fully modular design features flat white cables alongside a black chassis, and its dedicated 12VHPWR cable supplies up to 600 watts directly to compatible graphics cards. It suits builders needing modern power delivery for high-draw hardware.
Pros
- Native 12VHPWR cable provides up to 600W to PCIe 5.1 graphics cards
- ATX 3.1 rated to handle 200% total power excursion and 300% GPU excursion
- 80 Plus Gold certification for efficient power delivery
- Fully modular flat cabling for simplified wire routing
Cons
- White cables included with a black casing may conflict with single-color themes
- 850W capacity limits headroom for multi-GPU or extreme-wattage components
Good fit if
- You need a native 600W 12VHPWR cable for a PCIe 5.1 graphics card.
- You want a fully modular ATX 3.1 power supply with an 80 Plus Gold rating.
Skip if
- You require more than 850W of total capacity for your configuration.
- You want black cables that match the black chassis finish.
Verdict: Segotep 850W Gold Modular Power Supply delivers current ATX 3.1 and PCIe 5.1 power specifications in a standard ATX enclosure. It provides a native 600W high-power connection along with modular flat cabling for modern PC builds.
Cooler Master V750 SFX Gold PCIe 5.1 PSU
Best for: compact mini-ITX PCIe 5.1 builds
- PCIe Version
- PCIe 5.1
- Efficiency Rating
- Gold
- ATX Version
- ATX 3.1
- PCIe Connector Type
- 12VHPWR
- Form Factor
- SFX
- Dimensions
- 3.94 × 4.92 × 2.5 inches
View on Amazon: Cooler Master V750 SFX Gold PCIe 5.1 PSU (paid link)
This Cooler Master unit is a 750-watt SFX power supply built for compact mini-ITX cases. It features ATX 3.1 support and a native 90-degree PCIe 5.1 12VHPWR cable engineered to supply up to 450 watts directly to modern graphics cards. Measuring 3.94 by 4.92 by 2.5 inches, it suits you if you need compact dimensions and tight cable routing.
Pros
- Compact SFX form factor measuring 3.94 x 4.92 x 2.5 inches
- Includes a 90-degree angled PCIe 5.1 12VHPWR connector
- Supplies up to 450W power to graphics cards via ATX 3.1 cable
- Integrated transformer, rectifier, and full-bridge LLC topology
Cons
- PCIe 5.1 power delivery capped at 450W instead of 600W
- Short customized cables may require extensions in larger cases
Good fit if
- You are assembling a high-performance mini-ITX build.
- You need a 90-degree PCIe 5.1 connector for tight clearance.
- You use a graphics card requiring up to 450W of power.
Skip if
- You need a full 600W PCIe 5.1 output for your graphics card.
- You are installing into a large case requiring long stock cables.
Verdict: Cooler Master V750 SFX Gold delivers dedicated 750W power and a right-angled PCIe 5.1 cable tailored for small-form-factor cases. Its compact dimensions make it an ideal choice when space is limited.
Redragon 850W 80+ Gold ATX 3.1 RGB PSU
Best for: white PC builds needing PCIe 5.1 power
- PCIe Version
- PCIe 5.1
- Wattage
- 850W
- Efficiency Rating
- 80+ Gold
- Modularity
- Fully Modular
- ATX Version
- ATX 3.1
- PCIe Connector Type
- 12V-2x6
View on Amazon: Redragon 850W 80+ Gold ATX 3.1 RGB PSU (paid link)
The Redragon 850W Gold power supply gives you ATX 3.1 and PCIe 5.1 compliance in a white chassis. It features a native 12V-2x6 cable for modern graphics cards, 80 Plus Gold efficiency, and full modularity to keep your case tidy. Its zero-RPM mode keeps the nine-mode RGB fan silent below 60°C. This unit fits your build if you want dedicated power delivery and custom lighting without extra cable bulk.
Pros
- Native 12V-2x6 PCIe 5.1 cable connects directly to modern GPUs
- 80 Plus Gold certified efficiency with DC-to-DC topology
- Zero-RPM fan mode remains off under 60°C
- Fully modular cabling simplifies case cable management
- 100% Japanese capacitors with comprehensive protection suite
Cons
- 160mm depth is longer than standard 140mm compact ATX power supplies
- Integrated RGB lighting does not suit stealth or non-illuminated builds
Good fit if
- You need a native 12V-2x6 PCIe 5.1 connector for modern graphics cards.
- You want an RGB-lit fan with zero-RPM silent operation under 60°C.
- You are building a white-themed PC with fully modular cables.
Skip if
- You require more than 850W of continuous power for high-draw hardware.
- You prefer a non-illuminated power supply for a discreet dark aesthetic.
Verdict: Redragon 850W Gold ATX 3.1 White RGB Power Supply delivers modern PCIe 5.1 graphics support, modular convenience, and custom lighting for mid-to-high-end rigs. Its 100% Japanese capacitors and zero-RPM cooling ensure steady, quiet power delivery.
MSI MEG Ai1300P 1300W Platinum ATX 3.1 PSU
Best for: high-wattage builds needing 80 Plus Platinum efficiency
- PCIe Version
- PCIe 5.1
- Wattage
- 1300W
- Efficiency Rating
- 80 Plus Platinum
- Modularity
- Fully Modular
- ATX Version
- ATX 3.1, ATX 3.0
- PCIe Connector Type
- 12V-2x6
View on Amazon: MSI MEG Ai1300P 1300W Platinum ATX 3.1 PSU (paid link)
The MSI MEG Ai1300P is a 1300W fully modular ATX power supply built for power-heavy setups. You get 80 Plus Platinum efficiency, native PCIe 5.1 compliance with a dedicated 12V-2x6 connector, and ATX 3.1 standards. Internally, it features 100 percent Japanese 105°C capacitors backed by a 10-year warranty. It suits you if you run high-draw hardware like Nvidia GeForce RTX 40 Series graphics cards and need high electrical efficiency.
Pros
- 80 Plus Platinum certified efficiency
- High 1300W total capacity
- Native 12V-2x6 PCIe 5.1 connector
- 100% Japanese 105°C capacitors
- 10-year warranty
Cons
- Large footprint with an 8.27-inch chassis length
- 1300W output exceeds mid-range power requirements
Good fit if
- You need 1300W of capacity for high-draw hardware like RTX 40 Series GPUs.
- You prioritize 80 Plus Platinum efficiency with a native 12V-2x6 connector.
- You have a PC chassis with clearance for an 8.27-inch power supply.
Skip if
- You run a mid-range system that does not require 1300W of power.
- You are building inside a compact case with tight PSU clearance.
Verdict: MSI MEG Ai1300P 1300W 80 Plus Platinum PSU delivers massive 1300W output and high efficiency for demanding PCIe 5.1 hardware. Its native 12V-2x6 cable and Japanese capacitors make it a heavy-duty option if your chassis fits its length.
MSI MPG 850W Gold ATX 3.1 Power Supply
Best for: mid-to-high-end PCIe 5.1 gaming systems
- PCIe Version
- PCIe 5.1
- Wattage
- 850W
- Efficiency Rating
- 80+ Gold
- Modularity
- Fully Modular
- ATX Version
- ATX 3.1
- PCIe Connector Type
- 12V-2x6
View on Amazon: MSI MPG 850W Gold ATX 3.1 Power Supply (paid link)
The MSI MPG 850W PCIe 5.1 Power Supply is an ATX 3.1 power supply engineered for modern gaming builds. It delivers 850W of continuous power with 80 Plus Gold efficiency and features a native 12V-2x6 connector built for PCIe 5.1 graphics cards. With fully modular cabling and 100% Japanese 105°C capacitors, this unit suits you if you need a reliable 850W foundation with a 10-year warranty for your gaming setup.
Pros
- Native 12V-2x6 connector with ATX 3.1 and PCIe 5.1 support
- 80 Plus Gold certified efficiency
- 100% Japanese 105°C internal capacitors
- Fully modular cabling configuration
- 10-year limited warranty coverage
Cons
- Total output limited to 850W
- Standard ATX casing dimensions cannot fit SFX-only enclosures
Good fit if
- You need a native 12V-2x6 connector for a PCIe 5.1 GPU.
- You want an 850W fully modular unit backed by a 10-year warranty.
Skip if
- You need more than 850W of power for multi-GPU or extreme-draw hardware.
- You are building inside a compact Mini-ITX chassis requiring an SFX power supply.
Verdict: MSI MPG 850W PCIe 5.1 Power Supply delivers ATX 3.1 compatibility and native 12V-2x6 connectivity in a fully modular package. It provides solid 80 Plus Gold efficiency and Japanese capacitors for balanced modern gaming configurations.
Thermaltake Toughpower GF3 1000W ATX 3.1
Best for: high-wattage PCIe 5.1 graphics card builds
- PCIe Version
- PCIe 5.1
- Wattage
- 1000W
- Efficiency Rating
- 80 Plus Gold
- Modularity
- Full Modular
- ATX Version
- ATX 3.1
- PCIe Connector Type
- 12V-2x6
View on Amazon: Thermaltake Toughpower GF3 1000W ATX 3.1 (paid link)
The Thermaltake Toughpower GF3 1000W is a fully modular ATX 3.1 power supply equipped with native PCIe 5.1 support. It features a dedicated 12V-2x6 connector capable of routing up to 600W to modern graphics cards. The unit provides 80 Plus Gold efficiency, flat modular cables, and a 135mm cooling fan. If you need a high-wattage power supply designed to handle power excursions for modern PCIe 5.1 hardware, this unit meets those requirements.
Pros
- Native PCIe 5.1 12V-2x6 cable delivers up to 600W
- ATX 3.1 compliance handles up to 3x GPU excursions
- Two-tone matcha connector gives visual confirmation of full seating
- Fully modular flat cables improve routing flexibility
Cons
- 80 Plus Gold efficiency rather than Platinum or Titanium
- 6.3-inch length requires standard ATX clearance
Good fit if
- You run a high-demand PCIe 5.1 graphics card requiring a 600W 12V-2x6 connector
- You prefer a visual indicator to confirm GPU power plugs seat completely
- You need flat, fully modular cables to simplify case cable management
Skip if
- You need an SFX or compact-depth enclosure fit
- You require an efficiency rating higher than 80 Plus Gold
Verdict: Thermaltake Toughpower GF3 1000W ATX 3.1 PSU delivers stable power and native 600W 12V-2x6 output for demanding hardware. Its visual connector design helps ensure proper seating during installation.
Corsair RM1000x Shift 1000W ATX 3.1 PSU
Best for: 1000W PCIe 5.1 modular PC builds
- PCIe Version
- PCIe 5.1
- Wattage
- 1000W
- Modularity
- Fully Modular
- ATX Version
- ATX 3.1
- Dimensions
- 7.09 × 5.91 × 5.08 inches
- Weight
- 4.2 pounds
View on Amazon: Corsair RM1000x Shift 1000W ATX 3.1 PSU (paid link)
The Corsair RM1000x Shift is a 1000W ATX power supply built to the ATX 3.1 and PCIe 5.1 standards. It features Corsair Type 5 Gen 1 micro-fit modular connectors and 105°C-rated Japanese electrolytic capacitors. It also provides a zero-RPM fan mode to eliminate fan noise at low and medium loads. This unit suits you if you require steady power delivery with Modern Standby wake support.
Pros
- 1000W output with ATX 3.1 and PCIe 5.1 compliance
- 100% 105°C-rated Japanese electrolytic capacitors
- Fully modular Type 5 Gen 1 micro-fit connectors
- Zero RPM fan mode during low and medium loads
- Supports Modern Standby for fast wake times
Cons
- 7.09-inch length requires a chassis with sufficient PSU clearance
- Uses Type 5 micro-fit connectors rather than standard full-size modular plugs
Good fit if
- You need 1000W of power with ATX 3.1 and PCIe 5.1 support.
- You want silent operation at low to medium loads via zero-RPM fan mode.
- You want smaller Type 5 micro-fit modular cables for space efficiency.
Skip if
- You have a compact case that cannot accommodate a 7.09-inch long unit.
- You need more than 1000W for extreme multi-GPU setups.
Verdict: Corsair RM1000x Shift 1000W ATX 3.1 PSU provides reliable 1000W power delivery with ATX 3.1 spike resistance and 105°C Japanese capacitors. Its zero-RPM fan mode and micro-fit connectors make it an efficient option for modern builds.
Seasonic Vertex 1200W ATX 3.1 Power Supply
Best for: high-power PCIe 5.1 gaming and workstation builds
- PCIe Version
- PCIe 5.1
- Wattage
- 1200W
- Modularity
- Full modularity
- ATX Version
- ATX 3.1, ATX 3.0
- PCIe Connector Type
- 12VHPWR
- Fan Size
- 135mm
View on Amazon: Seasonic Vertex 1200W ATX 3.1 Power Supply (paid link)
The Seasonic Vertex 1200W Gold ATX PSU delivers 1200 watts of power with ATX 3.1 and PCIe 5.1 support. It features a fully modular layout and includes a dedicated 12VHPWR cable for modern graphics hardware. An integrated 135mm fluid dynamic bearing fan paired with hybrid silent control handles cooling. If you run a high-demand flagship system requiring substantial wattage and current PCIe standards, this unit fits your build.
Pros
- 1200W output with 80 Plus Gold efficiency
- PCIe 5.1 and ATX 3.1 support with dedicated 12VHPWR cable
- Fully modular cable configuration
- 135mm Fluid Dynamic Bearing fan with Hybrid Silent Fan Control
Cons
- 80 Plus Gold efficiency rather than available Platinum tier
- Heavier build at over 7.2 pounds
Good fit if
- You need 1200W of power for high-draw graphics cards.
- You want native ATX 3.1 and PCIe 5.1 support with a 12VHPWR cable.
- You prefer a fully modular design with silent fan profiles.
Skip if
- You want an 80 Plus Platinum efficiency rating.
- You need a compact SFX power supply for small cases.
Verdict: Seasonic Vertex 1200W Gold ATX PSU provides high-wattage delivery with modern PCIe 5.1 connectivity and fully modular cable management. It suits high-demand systems needing 1200W of reliable ATX 3.1 power.
Vetroo 1000W White Power Supply
Best for: high-wattage white ATX desktop builds
- PCIe Version
- PCIe 5.1
- Wattage
- 1000W
- Efficiency Rating
- 80 Plus Gold
- Modularity
- Full Modular
- ATX Version
- ATX 3.1
- Dimensions
- 5.9 × 5.5 × 3.4 inches
View on Amazon: Vetroo 1000W White Power Supply (paid link)
The Vetroo 1000W White ATX 3.1 Power Supply delivers 1000W of power in an ATX form factor for modern hardware. It supports PCIe 5.1 and ATX 3.1 standards, making it ready for high-demand graphics cards while maintaining backward compatibility with PCIe 4.0 and 3.0. A fully modular cable design and 80 Plus Gold efficiency give you clean cable routing and lower waste heat. It suits you if you build a high-wattage white-themed desktop.
Pros
- Native ATX 3.1 and PCIe 5.1 compliance
- 80 Plus Gold certified efficiency
- Fully modular cable system
- Built with 105° C rated capacitors
Cons
- Standard ATX dimensions do not fit compact SFX enclosures
- Efficiency reaches 80 Plus Gold rather than Platinum or Titanium levels
Good fit if
- You need a 1000W power supply with a white exterior finish.
- You require PCIe 5.1 and ATX 3.1 support for modern components.
- You want fully modular cables to avoid unnecessary clutter inside the case.
Skip if
- You need a small form factor SFX power supply for a mini-ITX chassis.
- You require an efficiency rating higher than 80 Plus Gold.
Verdict: Vetroo 1000W White ATX 3.1 Power Supply provides 1000W of fully modular power built around ATX 3.1 and PCIe 5.1 standards. Its white finish and 105° C capacitors make it a dependable choice for high-draw themed systems.
Fasgear 70cm PCIe 5.1 12VHPWR Power Cable
Best for: compatible modular PSUs powering 16-pin GPUs
- PCIe Version
- PCIe 5.1
- PCIe Connector Type
- 12VHPWR
- Dimensions
- 4.72 × 4.53 × 1.38 inches
- Weight
- 6.35 ounces
View on Amazon: Fasgear 70cm PCIe 5.1 12VHPWR Power Cable (paid link)
A modular power supply cable rather than a standalone power unit, this 70cm PCIe 5.1 12VHPWR cable connects ASUS, EVGA, or Seasonic fully modular power supplies to graphics cards requiring a 12+4 pin connector. It features 16AWG tinned copper wire supporting power delivery up to 600W. You get four bundled cable combs for routing. It suits your build if you need a direct 16-pin cable replacement without upgrading your compatible modular power unit.
Pros
- Supports power delivery up to 600W
- Constructed with 16AWG tinned copper wiring
- 70cm length provides reach for large cases
- Includes 4 transparent acrylic cable combs
Cons
- Accessory cable only, not a complete power supply
- Restricted to select ASUS, EVGA, and Seasonic fully modular units
- Incompatible with GPUs using standard 8-pin or 12-pin ports
Good fit if
- You own a compatible fully modular ASUS, EVGA, or Seasonic power supply.
- You run a graphics card requiring a 16-pin 12+4 pin connection.
- You need a 70cm dedicated cable rated up to 600W.
Skip if
- You need a complete standalone PC power supply unit.
- You use a semi-modular or non-modular power supply.
- You run a power supply brand requiring different pinouts.
Verdict: Fasgear 70cm PCIe 5.1 12VHPWR Power Cable delivers up to 600W over 16AWG tinned copper wiring for compatible modular setups. It provides direct GPU connectivity without requiring a full power supply replacement.
Specifications side by side
| Spec | MSI MAG 850W Fully Modular ATX Power Supply | Corsair RM850x 850W Fully Modular ATX 3.1 PSU | Corsair RM1000x 1000W ATX 3.1 PSU | Corsair RM750x Shift White 750W ATX Power Supply | Corsair RM850x Shift 850W White ATX Power Supply | Segotep 850W ATX 3.1 Gold Power Supply | Cooler Master V750 SFX Gold PCIe 5.1 PSU | Redragon 850W 80+ Gold ATX 3.1 RGB PSU | MSI MEG Ai1300P 1300W Platinum ATX 3.1 PSU | MSI MPG 850W Gold ATX 3.1 Power Supply | Thermaltake Toughpower GF3 1000W ATX 3.1 | Corsair RM1000x Shift 1000W ATX 3.1 PSU | Seasonic Vertex 1200W ATX 3.1 Power Supply | Vetroo 1000W White Power Supply | Fasgear 70cm PCIe 5.1 12VHPWR Power Cable |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wattage | 850W | 850W | 1000W | 750W | 850W | 850W | not specified | 850W | 1300W | 850W | 1000W | 1000W | 1200W | 1000W | not specified |
| Efficiency Rating | 80+ Gold | Cybenetics Gold | Cybenetics Gold | 80 Plus Gold | 80 Plus Gold | 80 Plus Gold | Gold | 80+ Gold | 80 Plus Platinum | 80+ Gold | 80 Plus Gold | not specified | not specified | 80 Plus Gold | not specified |
| Modularity | Fully Modular | Fully Modular | Fully Modular | Fully Modular | Fully Modular | Fully Modular | not specified | Fully Modular | Fully Modular | Fully Modular | Full Modular | Fully Modular | Full modularity | Full Modular | not specified |
| ATX Version | 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 3.0 | ATX 3.1 | ATX 3.1 | ATX 3.1 | ATX 3.1, ATX 3.0 | ATX 3.1 | not specified |
| PCIe Connector Type | 12V-2x6 | 12V-2x6 | 12V-2x6 | not specified | PCIe 5.1 | 12VHPWR | 12VHPWR | 12V-2x6 | 12V-2x6 | 12V-2x6 | 12V-2x6 | not specified | 12VHPWR | not specified | 12VHPWR |
| Fan Size | not specified | not specified | not specified | 140mm | not specified | not specified | not specified | not specified | not specified | not specified | 135mm | not specified | 135mm | not specified | not specified |
| Warranty | 10 Year | not specified | not specified | not specified | not specified | not specified | not specified | not specified | 10 Year | 10 Year | not specified | not specified | not specified | not specified | not specified |
| Form Factor | ATX | ATX | ATX | ATX | ATX | ATX | SFX | ATX | ATX | ATX | ATX | ATX | ATX | ATX | not specified |
| 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 | PCIe 5.1 | PCIe 5.1 |
| Recommended Use | Gaming | not specified | not specified | not specified | not specified | not specified | not specified | not specified | Gaming | Gaming | not specified | not specified | not specified | not specified | not specified |
| Connector | 12V-2x6 Connector | 12V-2x6 Connector | 12V-2x6 Connector | not specified | not specified | not specified | not specified | not specified | 12V-2x6 Connector | 12V-2x6 Connector | 12V-2x6 Connector | not specified | not specified | not specified | not specified |
| Size | 850W (PCIE 5) | 850W | 1000W | 750W | 850W | not specified | 750 | 850 Watts (RGB Version) | 1300W | 850W | 1000W | 1000W | 1200W | 1000W | For ASUS/EVGA/Seasonic |
| Dimensions | 12 × 8.75 × 4.92 inches | 2.3 × 3.39 × 5.91 inches | 2.3 × 3.39 × 5.91 inches | 6.3 × 5.91 × 3.39 inches | 6.3 × 5.91 × 3.39 inches | 5.91 × 5.51 × 3.35 inches | 3.94 × 4.92 × 2.5 inches | 11.8 × 7.87 × 4.72 inches | 8.27 × 6.18 × 12.9 inches | 5.91 × 5.91 × 3.39 inches | 6.3 × 5.9 × 3.4 inches | 7.09 × 5.91 × 5.08 inches | 7.3 × 13.6 × 4.5 inches | 5.9 × 5.5 × 3.4 inches | 4.72 × 4.53 × 1.38 inches |
| Weight | not specified | 3.9 pounds | 6.88 pounds | 3.75 pounds | 3.75 pounds | 5.29 pounds | 3.13 pounds | 5.69 pounds | 3.31 pounds | 7.15 pounds | 3.95 pounds | 4.2 pounds | 7.28 pounds | not specified | 6.35 ounces |
| Color | not specified | Black | Black | White | White | Black | Black Edition | white | not specified | not specified | Black | Black | not specified | 1000W-White | Black |
| Model | not specified | not specified | not specified | CP-9020273-NA | not specified | 850W | MPY-7501-SFHAGV-3U1 | 732430986 | 306-7ZP4A11-CE0 | MPG A850G PCIE 5 | PS-TPD-1000FNFAGU-4 | CP-9020253-NA | VERTEX GX-1200 | 1000G5 | FG-16PM02 |
Is a PCIe 5.1 Power Supply Worth It?
PCIe 5.1 power supplies provide native high-power delivery through dedicated 12V-2x6 connectors. These units deliver up to 600W directly over a single modular cable to modern graphics hardware. This standard pairs with ATX 3.1 specifications across 750W to 1300W capacities, removing the need for multi-cable GPU adapters. Some models add visual connector designs or right-angled cables to simplify routing. Choosing PCIe 5.1 ensures direct physical compatibility with current 16-pin graphics cards while maintaining standard fully modular connections for your other components.
Worth it if
- You run modern graphics hardware requiring a native 12V-2x6 connector or up to 600W single-cable delivery.
- You want native ATX 3.1 power support without using multi-cable GPU adapters.
Skip it if
- You run components that use standard 8-pin PCIe power connections.
- You only need a standalone PCIe 5.1 modular cable update for your existing compatible power supply.
When you select an enclosure with sufficient clearance for modern power cables, match your components against dimensions listed for each corsair PC case.
How We Picked These PSUs
To select 15 power supplies for this guide, we identified units that list PCIe 5.1 support directly in their titles or published specifications. Many of these units feature native 12V-2x6 connectors designed for high-demand components. All information comes strictly from published manufacturer data sheets without physical handling. We also selected only one capacity or style per model line to keep your comparison focused.
We order the list with products in stock first, then by Amazon sales rank, placing better-selling products first. To help you evaluate the selections, we compared specifications including wattage, 80 Plus efficiency ratings, modularity, and ATX 3.1 support across ATX and SFX form factors.
How to Choose a PCIe 5.1 Power Supply
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Match Total Wattage Capacity
You must calculate the power demand of your components before choosing a wattage rating. The models on this list range from 750W up to 1300W. An 850W power supply works well for standard gaming systems with a single modern graphics card. If you run workstation hardware or high-draw graphics cards with overclocked processors, look at higher capacities. The Seasonic Vertex 1200W provides 1200W of output to handle large power spikes. Choose a wattage rating that leaves headroom above your total estimated system draw.
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Select 80 Plus Efficiency
Power supply efficiency measures how much power drawn from the wall reaches your PC components. Most models in this category feature an 80 Plus Gold rating, which provides solid electrical conversion for everyday gaming. If you run your system under heavy loads for extended hours, consider stepping up to an 80 Plus Platinum rating. The MSI MEG Ai1300P carries an 80 Plus Platinum certification for higher energy conversion efficiency. Check your expected daily system runtime to decide if higher efficiency rating levels fit your computing requirements.
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Verify Native 12V-2x6 Connectors
Modern PCIe 5.1 graphics cards utilize high-current power connectors to supply up to 600W through a single interface. Look for a unit that lists a native 12V-2x6 connector directly in its specifications. The Thermaltake Toughpower GF3 1000W includes a dedicated 12V-2x6 connector rated for 600W output to feed modern GPUs. Having this native cable eliminates the need for bulky multi-cable splitters inside your case. Verify that the power supply packaging or spec sheet specifically designates this connector type before making your purchase.
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Confirm ATX 3.1 Compliance
When buying a PCIe 5.1 power supply, confirm whether the unit also complies with the ATX 3.1 standard. The ATX 3.1 revision introduces updated guidelines for handling instantaneous electrical spikes and power excursions generated by modern graphics hardware. Units like the Corsair RM850x specify ATX 3.1 compliance alongside PCIe 5.1 connectivity. Matching both standards ensures your power supply integrates updated electrical safety protections and connector tolerances. Always check the published specification table to ensure ATX 3.1 is explicitly listed for the hardware you select.
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Review Warranty Coverage Duration
Power supplies protect your core internal components, making long-term manufacturer support a key specification to evaluate. A multi-year warranty indicates manufacturer confidence in internal components like capacitors and cooling fans. The MSI MAG 850W provides a 10-year warranty, offering extended coverage for your build over multiple upgrade cycles. Compare the published warranty length across different brands before you decide. Choosing a unit with extended coverage guarantees that the manufacturer supports the power supply against defects for the operational life of your desktop computer.
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Evaluate Dedicated Modular Cables
If you already own a compatible modular power supply, you might not require a complete power unit replacement. Certain accessories provide direct PCIe 5.1 connectivity to existing modular hardware. The Fasgear 70cm PCIe 5.1 12VHPWR Power Cable connects directly to compatible power supplies from brands like ASUS, EVGA, and Seasonic. It routes up to 600W of power directly to your card without intermediate adapters. Check your existing unit's brand and pin layout to verify whether a dedicated cable can fulfill your PCIe 5.1 hardware needs.
Frequently asked questions
What connector does a PCIe 5.1 power supply use for graphics cards?
PCIe 5.1 power supplies typically use the updated 12V-2x6 connector to power modern graphics cards. Models such as the MSI MAG 850W, MSI MPG 850W, and Corsair RM1000x feature this dedicated port directly on the rear panel. This design replaces multi-cable splitters with a streamlined 16-pin interface capable of handling heavy electrical loads efficiently.
Can you use a PCIe 5.1 power supply with an older motherboard?
Yes, you can use a PCIe 5.1 power supply with standard desktop motherboards. Models like the Segotep 850W and Corsair RM850x use standard ATX form factor dimensions and fully modular cables. Even though they supply updated PCIe 5.1 graphics connections, they still provide standard 24-pin motherboard and 8-pin CPU power leads required by existing desktop hardware.
What 80 Plus efficiency ratings do PCIe 5.1 power supplies offer?
Most PCIe 5.1 power supplies carry an 80 Plus Gold efficiency certification, while ultra-high-capacity units can reach 80 Plus Platinum. The MSI MAG 850W, Segotep 850W, and Corsair RM850x Shift operate at Gold level. If you need maximum electrical efficiency, the MSI MEG Ai1300P provides an 80 Plus Platinum rating to reduce waste heat during operation.
Do you have to buy a new power supply to get PCIe 5.1 cabling?
Not necessarily, because you can use a dedicated replacement cable if your current power supply is compatible. The Fasgear 70cm PCIe 5.1 cable connects directly to select modular units from Seasonic, EVGA, or ASUS. It features 16AWG tinned copper wire supporting up to 600W, allowing you to run modern GPUs without buying an entirely new power unit.
How do Corsair Shift PCIe 5.1 power supplies differ from standard models?
Corsair Shift models place their modular cable sockets on the side panel rather than the rear. Units such as the RM750x Shift, RM850x Shift, and RM1000x Shift use micro-fit connectors positioned sideways for easier access behind the motherboard tray. You need to ensure your PC chassis has sufficient clearance between the PSU chamber and the side panel before choosing one.
Are white PCIe 5.1 power supplies available for themed builds?
Yes, several PCIe 5.1 power supplies come with factory white enclosures and matching styling. The Corsair RM850x Shift White, Vetroo 1000W White, and Redragon 850W Gold RGB provide white finishes for color-coordinated PC cases. These fully modular units let you maintain a clean white aesthetic while delivering modern ATX 3.1 and PCIe 5.1 graphics connectivity.
What is the highest wattage PCIe 5.1 power supply available?
The highest capacity option in this group is the MSI MEG Ai1300P, which provides 1300W of total output. If your build does not require 1300W, the Seasonic Vertex offers 1200W, while models like the Corsair RM1000x, Thermaltake Toughpower GF3, and Vetroo supply 1000W. These high-capacity units suit multi-component configurations drawing sustained, heavy power.