The best power supply with a modern GPU power connector depends on your system’s wattage needs and desired headroom. These five ATX 3.1 models include native PCIe 5.1 connectors, including the newer 12V-2×6 design on several options. The MSI MAG A850GL suits many 850W builds, the MSI MAG A750GL is the lower-wattage choice, and the CORSAIR RM1000x and RM1000e provide 1000W capacity. Check your graphics card’s connector and power requirements before choosing.
| Power Supply | Wattage | Best For | Notable Feature |
|---|---|---|---|
| MSI MAG A850GL PCIE5 | 850W | Modular 850W builds | Native 12V-2×6 cable |
| Thermaltake Toughpower GT | 850W | Quiet low-load operation | Smart Zero Fan |
| CORSAIR RM1000x | 1000W | Higher-capacity builds | ATX 3.1 compliant |
| MSI MAG A750GL PCIE5 | 750W | Lower-wattage systems | Native 12V-2×6 cable |
| CORSAIR RM1000e (2026) | 1000W | 1000W builds prioritizing fan control | 120mm rifle bearing fan |
MSI MAG A850GL PCIE5
The MSI MAG A850GL is an 850W, fully modular power supply with 80 PLUS Gold certification. Its listed features include ATX 3.1 and PCIe 5.1 readiness, plus a native dual-color 12V-2×6 cable. The modular design lets builders connect only the cables their system needs.
Best for: A gaming PC build that calls for 850W and needs a native modern GPU power cable. Its 10-year limited warranty is also a notable listed feature. Choose this if you want an 850W option with the 12V-2×6 cable identified in the product details.
Consideration: Confirm that 850W meets the combined requirements of your graphics card and other components; this wattage may not suit every high-power configuration.
Thermaltake Toughpower GT 850W
This Thermaltake 850W model supports ATX 3.1 and PCIe 5.1 and lists a native 450W PCIe 5.1 connector. It has 80 PLUS Gold efficiency, which the product information describes as up to 90% efficiency, and Smart Zero Fan technology that adjusts fan speed based on load.
Best for: Builders seeking an 850W unit with a native 12V-2×6 connector and automatic fan adjustment. Smart Zero Fan is intended to minimize fan noise during low-load operation, making this a better fit for buyers who value quieter behavior when the system is not under heavy load.
Consideration: The listed warranty is five years, shorter than the 10-year limited warranties listed for the MSI MAG models.
CORSAIR RM1000x ATX 3.1
The CORSAIR RM1000x provides 1000W and fully modular cabling. It is ATX 3.1 compliant and supports PCIe 5.1, with the product details noting resistance to transient power spikes. Its Cybenetics Gold certification is rated for up to 91% efficiency.
Best for: A build that needs 1000W capacity, including a system whose component requirements call for more headroom than an 850W unit provides. It is a stronger capacity choice than the two 850W models in this list, while retaining a fully modular design.
Consideration: The supplied features do not specify a particular 12V-2×6 cable’s wattage. Check the included cable details and GPU connector requirements before purchasing.
MSI MAG A750GL PCIE5
The MSI MAG A750GL is a fully modular 750W power supply with 80 PLUS Gold certification. It is listed as ATX 3.1 and PCIe 5.1 ready and includes a native dual-color 12V-2×6 cable. Its listed warranty is a 10-year limited warranty.
Best for: Buyers whose complete system is suited to 750W and who want a native 12V-2×6 cable without stepping up to an 850W model. Its modular cabling can also help limit unused cables inside a build.
Consideration: It offers less wattage headroom than the 850W and 1000W options here. Check the GPU manufacturer’s power guidance and the requirements of the rest of the system before selecting it.
CORSAIR RM1000e (2026)
This 1000W CORSAIR model is fully modular and Intel ATX 3.1 certified, with PCIe 5.1 support. Its listed features say it withstands two-times transient power excursions from the GPU. A 120mm rifle bearing fan uses a calculated fan curve intended to keep noise down, including at full load.
Best for: A 1000W system where the buyer wants modular cabling and a specifically described fan design. Compare it with the RM1000x if you are choosing between two 1000W ATX 3.1 options; the RM1000e listing highlights the 120mm fan and transient-excursion specification.
Consideration: The supplied details do not state the exact 12V-2×6 cable wattage, so verify the cable included with the unit against your GPU’s requirements.
Buying Guide: How To Choose A Power Supply With 12VHPWR
Is 12VHPWR the same as 12V-2×6?
These names refer to related 16-pin GPU power connections. The products in this list identify their newer connector as 12V-2×6, while the search term 12VHPWR is still commonly used by buyers. Check the exact connector and cable requirements in your graphics card documentation rather than relying on a broad label alone.
How much wattage should you choose?
Start with the graphics card manufacturer’s recommended power supply capacity, then account for the processor and other components. The 750W MSI is the lowest-wattage choice here, the 850W MSI and Thermaltake models sit in the middle, and the CORSAIR options provide 1000W. Do not assume higher wattage is necessary for every system.
Why consider ATX 3.1 and PCIe 5.1?
These specifications indicate support for newer power-supply and graphics-card platforms. The listed units identify ATX 3.1 and PCIe 5.1 support, but cable details differ: MSI specifies a native 12V-2×6 cable, and Thermaltake specifies a native 450W PCIe 5.1 connector. Confirm what is included for any model whose listing does not state the cable rating.
Does modular cabling matter?
Fully modular designs let builders connect only the cables needed for the system. That can make cable selection and routing more flexible. All five products here list fully modular cabling, so wattage, connector details, efficiency certification, and fan features can help separate them.
Frequently Asked Questions
Which listed power supplies specify a native 12V-2×6 cable?
The MSI MAG A850GL PCIE5 and MSI MAG A750GL PCIE5 list a native dual-color 12V-2×6 cable. The Thermaltake Toughpower GT lists a native 450W PCIe 5.1 connector.
Which option has the lowest wattage?
The MSI MAG A750GL PCIE5 is the lowest-wattage option in this selection at 750W.
Which models provide 1000W?
The CORSAIR RM1000x ATX 3.1 and CORSAIR RM1000e (2026) both provide 1000W.
Should I choose an 850W or 1000W power supply?
Choose based on the total system requirements and GPU manufacturer guidance. The 1000W units provide more capacity, while an 850W model may be appropriate when the complete build calls for less.