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Best 850W & 1000W PSUs for RTX 4080 SUPER & RTX 4090 Builds

Henrique 
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Looking to get a high-end, high quality 850W or 1000W for a GeForce RTX 4090, RTX 4080 SUPER or Radeon RX 7900 XTX build? Tag along for some of the best ATX 3.0 & PCIe 5.0 and ATX 3.1 & PCIe 5.1 PSU options you can get, without breaking the bank!

The power consumption number for the GeForce RTX 4090 is 450W at maximum load (Stock, according to Nvidia), and the recommendation is a 850W PSU. For a gaming build, with CPUs such as the Ryzen 7 7800X3D, a 850W PSU is more than enough. But if you are looking to get a PSU for a workstation build, with a more powerful and power hungry CPU, something like a Ryzen 9 7950X and Ryzen 9 9950X or Intel i7-14700K and Intel i9-14900K, it would be highly recommended to get a 1000W PSU instead.

  • The 1000W PSU recommendation is also valid if you plan to overclock the components (CPU and/or GPU), or want some headroom for future upgrades.
  • For workloads that can fully utilize both GPU and CPU at the same time, especially if overclocked, it is recommended to get a 1200/1300W or better PSU.

The GeForce RTX 4080 SUPER sits at a much more comfortable 320W during maximum load (Stock, according to Nvidia), meaning a 850W PSU would already be overkill if you are looking into a gaming build, and more than enough for a workstation build. It is a similar story with the Radeon RX 7900 XTX, AMD claims around 355W power consumption at max load, so the recommendation is the same 850W.

Although a $300-350 80+ Titanium power supply would be the absolute best option, it is important to note that there are many high-end, high quality, reliable, highly efficient and silent PSUs, that are much more reasonable options, at a much, much lower price range.

If you are looking to power a gaming PC, or want a good, reliable PSU for a workstation without breaking the bank, here are some of the best options available!

Corsair

The Corsair RM850e and Corsair RM1000e are some of the top picks for high-end, not too expensive, high wattage PSUs. Both are mostly silent (Cybenetics A-), highly efficient, with Cybenetics Platinum rating for the 1000W model, and Cybenetics Gold for the 850W model. Both are compact PSUs (140mm), have very competitive pricing, being the most recommended options for a rational high-end build, be it a gaming or a workstation build.

The updated Corsair RMx ATX 3.1 series sits a tier above the RMe series. Featuring 10 year warranty, higher quality components, ATX 3.1 compliance, native 12V-2×6 GPU cable and compact size (160mm). The RM1000x ATX 3.1 is rated Cybenetics Platinum for efficiency, and the 850W version is rated Cybenetics Gold. Both are rated Cybenetics A for noise levels and come with a low noise 140mm fan with zero RPM mode.

  • The Corsair RMx SHIFT PSUs is another excellent option, especially those looking into a white build. But it requires some extra research to check for case compatibility due to it’s connector layout. Most Corsair ATX Cases are compatible.

The Corsair HX1000i is a must have for those who value efficiency above all else. Flaunting 80 PLUS® Platinum and Cybenetics Platinum scores for efficiency, Cybenetics A for noise levels, ATX 3.1 compliance and of course, a higher price tag. It is an excellent option for those who value those qualities, but it is a bit overkill and unnecessary for most users. It is also has a length of 180mm, requiring a big enough case to fit it’s large size.

Corsair RMe Series and Corsair RMe ATX 3.1 (2025) Series

Corsair RMx ATX 3.1 (2024) Series and Corsair HXi Series

Corsair RMx SHIFT Series

NZXT

NZXT’s recent releases for the C-Series Gold are really excellent options and worth considering for your build. Featuring compact size (160mm), high efficiency, low noise, 10 year warranty and very competitive pricing for what they offer. Both have excellent Cybenetics A (1000W) and Cybenetics A- (850W) noise ratings, Cybenetics Gold and 80 PLUS® Gold efficiency ratings, with ATX 3.1 compliance.

NZXT C-Series PSUs are really strong competition for the Corsair RMe Series and Corsair RMx ATX 3.1 in both price and performance, and great options for those looking into a white PSU, who don’t want to deal with the Corsair RMx SHIFT case compatibility issues.

MSI

The MSI MPG A1000G PCIE5 and the MSI MAG A1000GL PCIE5 are two excellent options as well, with very competitive pricing, compact size (150mm), Cybenetics and 80 PLUS® Gold ratings for efficiency, but only a Cybenetics Standard++ foi noise ratings. Both deliver excellent performance and offer a 10 year warranty, 3 years more than the Corsair RM1000e, being at a similar price range.

The MSI MPG A850G PCIE5 offers the exact same recipe as the two model above, excellent build quality, great price, but with a more interesting Cybenetics A- rating for noise level, quite comparable in price to the Corsair RM850e, but with a longer warranty (10 years).

MSI MPG A-G PCIE5 and MSI MAG A-GL PCIE5

Seasonic

The new ATX 3.1 & PCIe 5.1 ready Seasonic Focus GX-1000 ATX 3 (2024) is another excellent, high-end, compact option (140mm length), with an excellent Cybenetics A- rating for noise levels, and Cybenetics Gold and 80 PLUS® Gold for efficiency ratings, and Cybenetics Platinum for the GX-850 ATX 3 (2024). It is worth considering if found at a good price, as it is an excellent PSU, with excellent performance and build quality, paired with a 10 year warranty.

The Seasonic Vertex GX-1000 and Vertex GX-850 improves in quality, efficiency and noise levels. It has a Cybenetics A rating for noise levels and Cybenetics Platinum for efficiency. With quite compact size, at 160mm length, it is an excellent, highly compatible option, worth checking if you are looking for a high-end, quiet power supply.

be quiet!

If you are looking into a high-end, not crazy expensive (especially if on sale), quiet PSU, the be quiet! Dark Power 13 1000W might be the perfect option. With an A+ noise rating from Cybenetics, courtesy of be quiet! excellent Silent Wings fans, and a 80 PLUS® Titanium efficiency rating, it is a perfect option for a high-end, highly efficient gaming or workstation build. The Dark Power 13 is quite large, at 175mm length, so a compatible case is required.

The be quiet! Pure Power 12 M 850W has an excellent Cybenetics Platinum efficiency rating and Cybenetics A- noise rating (Standard++ for the 1000W model), offers a really competitive price, 10 year warranty, high efficiency and quiet operation. The be quiet! Pure Power 12 M 1000W is an excellent choice for a more affordable 1000W option, as it is usually cheaper.

be quiet! Pure Power 12 M and be quiet! Dark Power 13

Thermaltake

Thermaltake GF3 850W is a really strong contender, featuring Cybenetics Gold and 80 PLUS® Gold efficiency rating, a really good Cybenetics A- noise rating (Cybenetics Standard+ for the 1000W model) and backed by an excellent 10 year warranty. It is an excellent option to be considered for a high-end gaming build, and usually found at an excellent price.

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