Best PSU for RTX 4080 Super builds: our top ATX 3.0 picks in 2024

Upgrading to 4080 Super? Here's our guide to the best PSU for RTX 4080 Super

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We’ve had some time since Nvidia revealed their new 40-series Super line of GPUs to think about what the best PSU for RTX 4080 Super cards is, and below are our hand-picked selections for your delectation. Given the power-hungry nature of this GPU, as per the RTX 4080 Super specs, we’ve picked out some suitable power supplies which will have no problem supporting it. Before you head off and find out where to buy the 4080 Super, we fully recommend at least reading the ‘what is the recommended PSU’ section further down this page to check if your current PSU is up to scratch and, if not, considering one of the options below.

Considering the recommended PSU wattage for the 4080 Super, there’s a good number of power supplies which work well here: our current top picks include the CORSAIR RM750x Shift and MSI MPG A850G PCIE5. Rest assured though that we keep this guide up to date with all the latest newer models that release. If you’re going for a full build, feel free to check out our best CPU for RTX 4080 Super and best motherboard for RTX 4080 Super guides, as well as the 4080 Super size page and best PC case for RTX 4080 Super to ensure it will actually all fit.

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Best PSU for RTX 4080 Super in 2024

The GeForce RTX 4080 Family, as Nvidia calls it, includes some of the best graphics cards money can buy. Sure, not quite on the level as the flagship RTX 4090, but more than enough for most enthusiasts. Below you’ll find the best PSUs up to the task.

Our top pick for a 4080 Super: CORSAIR RM750x Shift

CORSAIR RM750x Shift

Wattage

750W

80 Plus certification

Gold

Modularity

Fully modular

ATX 3.0

Yes

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Pros

• ATX 3.0 certified
• PCIe 5.0 12VHPWR cables included
• Zero RPM fan mode
• Robust build quality
• Fully modular

Cons

• Side-mounted cables not ideal for every case

Kicking things off with the ever-popular Corsair RMx range. However, there is one key difference – this belongs to the newer Shift line-up, which is fully ATX 3.0 and PCIe 5.0 compliant. This is an important factor if you want a PSU for the 4080 Super, as the high-end 40-series card makes use of the newer PCIe 5.0 12VHPWR cable, so you won’t have to resort to an adapter for this full modular PSU.

The RM750x Shift is a highly reliable PSU thanks to its great build quality. The 105°C-rated capacitors offer robust power delivery and a level of reliability which is hard to beat. Another thing to touch on is efficiency – this Corsair component is 80 Plus Gold rated, which is highly efficient for lower power consumption. This helps keep your system cooler and quiet – backed up by the Zero RPM fan which is near-silent during low-mid loads.

This is a 750W power supply, sitting at the recommended 750W you need for the RTX 4080 Super, with a little room to spare. If you want a little extra breathing room though, this series goes all the way up to 1200W.

A little extra power for comfort: MSI MPG A850G PCIE5

MSI MPG A850G PCIE5

Wattage

850 W

80 Plus certification

Gold

Modularity

Fully modular

ATX 3.0

Yes

How We Review

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Pros

• PCIe 5.0 & ATX 3.0
• Fully modular
• Reliable build quality
• 80 Plus Gold certification
• 10 year warranty

Cons

• Slightly more expensive

The MSI MPG A850G is a power supply that is very similar to what Corsair are offering, so we’d recommend it as an alternative. This particular model is 850W, so it gives you more power to work with if you want to be overclocking your GPU and other components, for example. 850W is more than enough for the RTX 4080 Super and can facilitate any small upgrades you have in future as well. This is another gold-rated PSU, so good efficiency levels are guaranteed; this can even help you save on electricity bills in the long term.

As a fully modular, PCIe 5, and ATX 3.0 power supply, it comes with the 16-pin PCIe 12VHPWR connector, which is just what you want for the 4080 Super to reduce cable clutter while avoiding the previous issue of melting adapters. Overall, you can’t go wrong with this PSU and we fully recommend it if you’re upgrading to a high-end GPU, specifically form the RTX 40-series.

Best for future upgrades: Seasonic Prime ATX 3.0 TX-1300

Seasonic Prime ATX 3.0 TX-1300

Wattage

1300W

Certication

80+ Titanium

Modularity

Fully

How We Review

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Pros

• Unmatched 80 Plus Titanium rating
• 1300W coverage
• ATX 3.0
• High-quality build & cables
• Fully modular

Cons

• Overkill for most
• Expensive

Now we know that upgrading from an RTX 4080 Super is not necessary for most right now, but it’s still worth investing in the best of the best if you like to keep up to date. Seasonic and a well-known brand for creating high-end power supplies, and this is unmatched in many aspects. First off, the 80 Plus Titanium efficiency rating is the very best you can get, two steps ahead of gold. This is important for such a high 1300W PSU like this to ensure it runs cool and quiet – backed up by the hybrid fan control for good measure.

This is of course a fully modular design for nice and tidy cable management – the PVC embossed cables are of a particularly high quality too. As an ATX 3.0 power supply, you get the recommend 12VHPWR cable for the 4080 Super like our other picks. All in all, this option represents one of the best power supplies money can buy, coming with a 12 year warranty for peace of mind as well.

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What is the recommended PSU for RTX 4080 Super according to Nvidia?

Taking a look at the RTX 4080 Super specs tells us that a 750W is suggested for this high-end SKU. While you can try and skimp and drop down around 50-100 Watts, we fully recommend picking out a power supply that is safely at or above the 750W mark. This reflects in our current selection, starting off with 750W for a suitable amount of supplied power.

We recommend strong build quality as well, with full modularity being a common aspect to make cable management easier for you. Future-proofing is always an option as well, with extra wattage to facilitate an upgrade in a few years or so.

How much power does the RTX 4080 Super use?

According to specifications, the RTX 4080 Super has a TDP of 320W. This means the amount of heat that the GPU can produce when under max load, though it will of course average much lower than this. By using the latest ATX 3.0 compatible power supplies, you can safely support these high-end cards as the 12VHPWR connector can generate up to 600W to PCIe 5.0 graphics cards, once the are widely available.

What efficiency rating should my power supply have for a 4080 Super?

Efficiency is an important aspect of buying a new power supply. While budget builds can skimp on the efficiency and opt for something like a bronze rating, we’d suggest something much better when using high-end hardware like the RTX 4080 Super. PSUs with higher wattage tend to follow this trend anyway, with gold efficiency being commonplace.

The more efficient it is, the less power it will consume, as little is wasted – leading to lower temperatures and running volume. Like we mentioned earlier too, it can help you save on your electricity bill in the long run.

Do I need an ATX 3.0 PSU for RTX 4080 Super?

While not strictly required, an ATX 3.0 PSU is definitely recommended for the RTX 4080 Super. Just like the RTX 4080 before it, this GPU will use the new 12VHPWR PCIe 5.0 connector, making the cable situation less messy. While you can use an 8-pin adapter for a non-ATX 3.0 PSU, this adds unnecessary clutter and may lead to overheating (or melting) cables. The 12VHPWR cable is a single connection, rather than the three we used to see for high-spec GPUs.

Does the RTX 4080 Super need 1000W PSU?

Tracking down the best 1000W PSU isn’t completely necessary when catering for the RTX 4080 Super, though it gives a generous amount of headroom. This graphics card only requires 750W, as recommended. Aside from this, we recommend focusing on ATX 3.0 and PCIe 5.0 support to ensure the best compatibility with the top end of the RTX 40 series cards.

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Final word

Ever since Nvidia introduced the RTX 40 Super series, we’ve been hard at work compiling a number of best-of guides. Now you know the best PSU for RTX 4080 Super, you can get on with building your gaming PC – fitted with some shiny new hardware.

You can also check out our best PSU for 4070 Super, best PSU for 4070 Ti Super guides if you’re interested in the other Super refresh cards. Or if need some new peripherals, see our best gaming monitor for RTX 4080 Super page.

More RTX 4080 Super guides

• Best PC case for RTX 4080 Super
• Best gaming monitor for RTX 4080 Super
• RTX 4080 Super vs 4070 Ti Super
• RTX 4080 Super vs 3090 Ti & 3090
• Best RTX 4080 Super
• Best RTX 4080 Super gaming PC