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Best PSU for RTX 4080, what power supply do you need?

With a new graphics card, you may be in the market for a new power supply to match it

Updated: Nov 29, 2022 9:43 am
Best PSU for the RTX 4080

This product launch season is full of the RTX 4000 series cards. Whilst the RTX 4090 has been out for a while now it’s now time for the RTX 4080, a serious contender for the best graphics card.

Although the launch of the cards has come with some scrutiny. Both in terms of the cost of the first cards launched being sky-high and concerns over the power usage. Even if the initial rumors suggested they were higher and the release has shown it to be not too far off the last gen.

Now with the new generation of cards, Nvidia is also using the new 12VHPWR connector. But the early adoption of the ATX 3.0 specification has not come with ease. With plenty of the connectors burning up on the 4090.

So with that, let’s get a closer look at what power supply for the RTX 4080 best suits you.

How we choose the best PSU for RTX 4080

Looking for the right product can be quite a daunting task when you’re not sure what you’re looking for. So that’s why sometimes it’s best to get another more informed opinion. And so we offer some expertise on the subject.

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We’ve had years of experience and knowledge of the market. So we know what to look out for between the different options offered by power supplies. With previously accumulated knowledge we can evaluate the options.

As well as looking over the offered reviews of options there is a lot to go off. Making sure that the PSU can handle the workload it is put under and how well the manufacturer’s track record is.

Grouped power supplies

Best PSU for RTX 4080 buying tips

Now there are some key features of a power supply that will influence what the best choice is for you. So when it comes to the best PSU for RTX 4080 here are some of the main factors to consider.

ATX 3.0 specification

One of the main considerations for this generation of power supplies is if you want a native cable for your GPU. This would save you from having to use the dreaded adapter, which has been seen to fail. And instead, you get a straight connection of the 12VHPWR connector.

However, this does come at a higher cost. Newer technology is still not too common and so the limited options aren’t cheap to buy. So it can be a consideration for you. Especially if you don’t mind using the octopus of an adapter the cards come with.

Wattage

Another difference to consider than when looking for the best power supply for the RTX 4090 is the wattage. The cards will have different requirements and so you don’t need to spend as much on unnecessary.

Wattage or power rating is how much energy the PSU can supply. This is to power your entire system and so you have to consider the entire build. Although GPU is one of the biggest contributors, CPU and other components need a supply too.

The RTX 4080 has a TBP (total board power) of 320 W. And Nvidia recommends a 750 W PSU when paired with a Ryzen 9 5900 X. Although that may be higher if you consider a newer CPU.

Or other custom models will have different recommendations. Such as the MSI Suprim suggests a total of 850 W for your build. So there’s an option for a safety net and buffer if you need it. Which can be good for any spikes that may occur during use.

Install The Power Supply 3
Screw into place with the provided PSU screws

Modularity

Cables are not fun to deal with in a build. Especially if you’re case is on the smaller side it can be hard to fit it nicely in when doing any management. So one factor to help minimize any stress is modularity.

Modularity refers to if the cables are replaceable and if you need to have all of them coming out or save on some unnecessary mess. There are options for fully modular (most common), semi-modular, or not modular.

These differ by how many cables come attached. So not modular would mean all the cables come preinstalled without the ability to change or remove them. So would have to fulfill your need for connections and take up a lot more space. Although this type tends to be limited to budget options and lower wattages.

Then there is semi-modular which offers choice for peripherals and VGA but tends to have the ATX 24-pin and CPU 8 pins attached. Whilst modular you can choose any cables so you can save plenty of space and only use what you need.

Efficiency

Another standard for power supplies is the efficiency rating. This is how much of the energy supplied is actually converted to useful energy for your PC. As wall power is given in AC but your system needs DC and there is inefficiency in the conversion given off as heat. So there are ratings to tell you how much is actually converted.

This standard is historically rated by the 80 Plus company and these efficiencies can be used to compare across the different options. With the Gold option being the most common. And from the table below you can see how those relate to the efficiencies. So if you want to save the most money on electricity a higher rating is a good consideration.

PSU 80 PLUS Certification

Best PSU for RTX 4080

So now we look to what actually is the best selection for your new graphics card to run it as it should.

MSI MPG A850G

Best PSU overall
Best RTX 4080 PSU

MSI MPG A850G PCIE5

MPG A850G PCIE5

Wattage

850 W

80 Plus certification

Gold

Modularity

Fully modular

ATX 3.0

Yes

5
/5
Editor’s Rating
Pros
  • Native 12VHPWR connector
  • Silent operation
  • Compact size
Cons
  • More expensive option for the specification

For the best choice for your new RTX 4080, you can pick up the MSI MPG A850G PCIe 5. It is a great pick for native support of the new ATX 3.0 connector. Giving you freedom over what cables you can be using.

It is rated 80 Plus Gold to provide some good efficiency in converting energy for what your system needs. Saving you a good bit of money when it comes to running it. Along with the standard protections to stop any systems from burning up or doing what they shouldn’t.

The PSU is fully modular as well with its 12VHPWR. Meaning it’s a good choice for keeping down your cable count. Especially as the numbers have increased over the years, the new spec really cuts it down.

It also has a quiet mode to keep the noise down whilst working away at the bottom of your PC.

ROG LOKI SFX-L 850W Platinum

Best efficient PSU
Most efficient PSU for RTX 4080

ROG LOKI SFX-L 850W

ROG LOKI SFX L 850W

Wattage

850

80 Plus certification

Platinum

Modularity

Fully modular

ATX 3.0

Yes

4
/5
Editor’s Rating
Pros
  • Platinum rating offers it the best efficiency for saving you money
  • Compact sizing to fit in easily
  • RGB lighting to throw in some color under your case
Cons
  • One of the most expensive options

Another compact pick is the ROG Loki SFX-L 850W Platinum. It also is PCIe Gen 5 ready with native 12VHPWR support to enable better cabling work inside of your case as well as with its fully modular build.

Although ASUS ROG is a more premium choice of manufacturer. So you do pay a bit more premium on the products, but they come with some good quality. It still makes it a popular choice with an array of products that will work well together as well.

It has great efficiency as well. Both 80 Plus Platinum and Lamda A certifications from Cybenetics. This means you can be sure that running it will save you plenty in the long run as its efficiency is one of the best available.

Cooling is great on it, with heatsinks and well-built and thought-out options. It also has a zero-decibel fan to keep running silently and stay out of the way.

Best Corsair PSU
Fan favorite

Corsair RM850x

Corsair RM850x

Wattage

850W

80 Plus certification

Gold

Modularity

Fully Modular

4.5
/5
Editor’s Rating
Pros
  • Fully modular for customization and clean building
  • Features maglev fan for the quietest and longest performance
  • Hybrid mode keeps the fan off until its needed
  • 10 year warranty to keep your PSU realiable and long lasting
Cons
  • Can be a more expensive option

Another more simple pick for a PSU for your RTX 4080 is the Corsair RM850x. It is a tried and tested popular choice of power for builds. So you know it’s a safe choice that can offer a great pick, especially with corsairs 12VHPWR solution.

It is 80 Plus Gold rated so it is a fairly standard choice, but does mean it can offer a cheaper selection since it’s not the latest specification. So you might miss out on some of the newer options but it can still get the job done.

Along with being fully modular, it does give some good cable management across the board. This means the complete look can be simple and organized. Even if you do have to use the adapter instead.

Final thoughts

The RTX 4080 is also coming in as a big card. So connectors can be a good consideration when it comes to installation and management. But there is a lot to choose from whether if its native support for the new connector or not.

There are multiple factors to consider depending on what you need. There is a range in pricing depending on your budget. As well as how much you want to then save on the electricity to run it.

Altogether, the most important things tend to be safety and efficiency. So it’s best to avoid the cheapest options you can find as those bring some danger with the unknown with them. And so always choose something reliable.

Best PSU for RTX 4080 FAQs

What is the RTX 4080 power consumption?

The RTX 4080 has a total board power of 320 W. It’s a fairly significant amount but not any higher than the previous generation but you still need to consider what you’re pairing it with.

What is the recommended PSU for the RTX 4080?

Nvidia recommends using a 750 W power supply for the RTX 4080. That’s when its paired with the 5900 X so if you’ve got something more powerful you may need to up that number. Which is the case for some custom models of the 4080 as they suggest using at least 850 W.

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