Home > PSU > PSU Buyer's Guide

Best PSU for RTX 4080 Super – our top picks

Find the perfect PSU for your RTX 4080 Super
Last Updated on May 15, 2024
The image shows a Corsair RM1000x below the PC guide logo
You can trust PC Guide: Our team of experts use a combination of independent consumer research, in-depth testing where appropriate - which will be flagged as such, and market analysis when recommending products, software and services. Find out how we test here.

If you’re trying to find the perfect PSU for your new RTX 4080 Super, then you’ve come to the right place!

The RTX 4080 Super, built on the 5nm process and based on Nvidia’s Ada Lovelace architecture, is one of the most powerful and efficient graphics cards on the market at the moment. This is why it’s important you ensure you have the right components to go with it, including a PSU. Finding the right PSU for your GPU can be a tough ask when the market is filled with a variety of options, all with different pros and cons.

In this guide, we’ll look at a variety of PSU options that are best suited to the RTX 4080 Super’s features, including SFX, premium, and budget options.

How we picked the best PSU for the RTX 4080 Super

Our selection process for the best PSU for the RTX 4080 Super involves a comprehensive analysis of publicly available benchmarks and user reviews. We focus on PSUs that meet the RTX 4080 Super’s minimum power requirements of 750W and provide additional headroom for system stability, especially under peak loads or when overclocking.

The goal is to recommend PSUs that offer stable and reliable power delivery across a range of scenarios, ensuring that the GPU and other components operate at their optimal potential. We consider a range of PSUs from different manufacturers, examining their performance, efficiency ratings, and the quality of their components.

We have several additional articles on the RTX 4080 Super, including our hands-on review that has helped us inform some of the decisions made in this guide. In addition to this, we’ve also drawn a comparison between the RTX 4080 Super and RTX 4090, so you can decide which GPU is best suited to your system.

Our top picks

Best PSU for RTX 4080 Super
  • Rear view of a desktop pc showing the Corsair RM1000X Shift power supply, cooling fan, and various input/output ports.
  • A close-up of the back panel of the Corsair RM1000X Shift power supply.
  • A Corsair RM1000X Shift power supply unit in front of its packaging box.
  • Thge top of a Corsair RM1000X Shift power supply unit placed on a surface, with the background of PC components shelves subtly shifted to a blur.
  • A Corsair RM1000X Shift modular power supply unit showing its connectors on the side
  • Corsair RM1000X Shift from the fan side
  • The rear panel of a desktop computer with various ports and a Corsair RM1000X power supply cable connected.
  • Wattage: 1000W
  • Form Factor : ATX
  • Rating: 80 Plus Gold, Cybenetics Gold
  • Design: Fully modular, side connectors
Reasons to Buy
  • Long lasting
  • Quiet and efficient performance
  • Fully modular
Reasons to Avoid
  • In cable capacitors
  • Larger size

The Corsair RM1000X SHIFT is an ideal choice for users seeking a balanced power supply unit for their RTX 4080 Super. This 1000W PSU brings together a combination of high-quality components and practical features, making it fully equipped to handle any high-end GPU, like the RTX 4080 Super.

What sets the RM1000x SHIFT apart is its combination of efficiency, quiet operation, and robust power delivery. The Zero RPM Fan Mode, which turns off the fan at low and medium loads, contributes to its near-silent operation, a feature especially appreciated in quiet workspaces or gaming setups. Additionally, its compliance with the ATX 3.0 standard and support for the PCIe 5.0 platform make it ready to handle next-generation hardware.

One potential downside is the PSU’s size. It extends to 180mm, which won’t be a problem for most cases, but if you’re using a more compact case this may be a factor to consider. However, this can be managed in most cases by removing the bottom hot-swap bay, which provides additional space. If you’d like to find yourself a larger case to match your PSU size, then check out our best case for RTX 4080 Super guide, where we list a bunch of different options to try.

While the RM1000X SHIFT might require some adjustment in smaller builds, its performance and feature set justify the space it occupies, making it a solid choice for those who prioritize a feature-rich and balanced PSU.

With a great load of power and strong efficiency, it provides a great choice for your next build

PC Guide

What users say

Like us, many customers have been impressed by the overall power and value of the Corsair RM1000X SHIFT, with lots of users taking to Amazon to express their satisfaction with the product. Mainly the RM1000X SHIFT’s ease of installation, low noise, and high performance are mentioned.

One customer states, “First and foremost, the power delivery of this PSU is outstanding. With a whopping 1000 watts of power, it effortlessly handles the demands of my system”. Another mentions their satisfaction with the noise level of the RM1000X SHIFT, stating “I like the fact it’s nice and quiet and works perfectly with my system!”

Best fully modular SFX PSU for RTX 4080 Super
  • Corsair SF850L fan, source PCGuide
  • Corsair SF850L logo side, source PCGuide
  • Corsair SF850L logo profile, source PCGuide
  • Corsair SF850L back side logo, source PCGuide
  • Corsair SF850L info label, source PCGuide
  • Corsair SF850L cable connectors side, source PCGuide
  • Wattage: 850W
  • Form Factor: SFX-L
  • Rating: 80 Plus Gold, Cybenetics Platinum
  • Design: Fully modular
Reasons to Buy
  • Smaller size
  • Fully modular
Reasons to Avoid
  • Smaller case may need to be purchased
  • Priced the same as ATX PSUs

If you’re someone looking to prioritize a smaller size when looking for a PSU, the Corsair SF850L might just be the option for you. This fully modular STX PSU can fit into a smaller case, due to its shorter length than standard ATX PSUs. Therefore, saving space and allowing for more room in your setup.

Measuring just 125 x 63.5 x 130mm, the Corsair SF850L is ATX 3.0 and PCle 5.0 compatible meaning you’ll be able to get many years out of it before you have to think about purchasing a new PSU. Additionally, the SF850L also has a number of spaced-out sockets, making it accessible and easy to plug in connectors. Despite its smaller size, the Corsair doesn’t drop in quality or power, offering an impressive 850W. This exceeds the minimum 750W needed to run power the RTX 4080 Super, making it the perfect smaller-sized match.

Primarily the Corsair SF850L offers a smaller size, but being a strong power supply it has a strong offering without cutting out much

PC Guide

You would hope that its smaller size would be reflected in its price. However, one downside of this product is that its price is aligned with other standard ATX PSUs on the market. Unfortunately, this PSU comes in at around $150, meaning you’re not paying a premium price for this PSU but it isn’t too dissimilar from the price points of larger ATX PSUs.

What users say

The Corsair SF850L has received a number of reviews on Amazon, mainly discussing the positive aspects of the power supply. Customers mention their satisfaction with the performance, size, and ease of installation of this product.

One user writes, “Great product no problems and well made. Easy to install and use. The shipping was fast and pricing was fair”, expressing their satisfaction with many aspects of the product. Another customer discusses the packaging of the product, “The packaging of the power supply unit and its cables is nice and clean. Even though I did not find any bag/sack for cables”.

Best preminum PSU for RTX 4080 Super
be quiet! Dark Power Pro 13 1300W
  • Wattage: 1300
  • Form Factor: ATX
  • Rating: 80 Plus Titanium
  • Design: Fully modular
Reasons to Buy
  • Extremely high power output
  • Very low noise operation
  • Excellent voltage regulation
Reasons to Avoid
  • Less effective filtering
  • Premium price point
  • Large size for compact setups

For our premium pick, we decided to go with power. The RTX 4080 Super is moving the bar up for power needs, and although it’s a very efficient GPU, the type of tasks users will be able to do will require a good deed of power. Here comes the be quiet! Dark Power Pro 13 1300W. The special thing about this PSU is that it offers 1300W of power, more than enough for any tasks you put it against. This is reflected in its price point, with it averaging at around $300.

The Dark Power Pro 13 stands out not just for its power but also for its exceptionally quiet operation and excellent thermal performance. This makes it an ideal choice for users who prioritize a silent working environment. This along with the PSU’s fully modular design adds to a clean and organized build. Lastly, the PSU is also ATX 3.0 compliant and fully supports PCIe 5.0, making it future-proof.

While the Dark Power Pro 13 excels in many areas, its filtering capabilities might not be as robust as some other models. However, for most users and typical use cases, this should not pose a significant issue. The PSU’s overall performance, efficiency, and quiet operation far outweigh this minor shortcoming, especially considering the power it provides.

What users say

The Dark Power Pro 13 has impressed users, who have taken to Amazon to express their thoughts on the product. From what we can see the majority of the reviews for this product are positive, with most customers focusing on its performance, ease of installation, and appearance.

One customer states, “This is without a doubt the best power supply I have used in any of my PC builds to date. The ease of use, versatility, and power efficiency is everything I could’ve asked for”, demonstrating the multitude of reasons why this product is popular. Another user mentions the cables included with the PSU, stating “Love the high-quality sleeved cables and overall ease of use.”

Best budget PSU for RTX 4080 Super
  • Corsair CX750 and box, source PCGuide
  • Corsair CX750 box contents, source PCGuide
  • Corsair CX750 box profile, source PCGuide
  • Corsair CX750 box, source PCGuide
  • Corsair CX750 connector end, source PCGuide
  • Corsair CX750 connectors, source PCGuide
  • Corsair CX750 fan side, source PCGuide
  • Corsair CX750 info sticker, source PCGuide
  • Corsair CX750 inside PC, source PCGuide
  • Corsair CX750 logo side, source PCGuide
  • Corsair CX750 on top of box, source PCGuide
  • Corsair CX750 plug side, source PCGuide
Highly Recommended
  • Wattage: 750W
  • Form Factor: ATX
  • Rating: 80 Plus Bronze, Cybenetics Silver
  • Design: Non-modular
Reasons to Buy
  • Low price point
  • Smaller size
  • Enough watts for RTX 4080 Super
Reasons to Avoid
  • Non-modular
  • Can get noisy
  • No PCle 5.9 support

The RTX 4080 Super is an expensive GPU, and you may have used almost all the budget on it. If that’s the case, Corsair has a great choice for you: the Corsair CX750. This PSU provides 750 watts of power, just enough to support the 4080 Super, and does so at a price point that’s attractive for budget-conscious users. This PSU comes in at an attractive price of around $80.

The Corsair CX750 stands out in the budget category and could be just the right option to pair with your RTX 4080 Super. Measuring 150mm x 86mm x 140mm, this PSU is not as long as other options out there which is advantageous when managing cables and trying to create space in your setup. This PSU does not include a hybrid fan, which is another reason for its low pricing. This means that it can contribute to a slightly noisy build, definitely a factor to consider if you’re looking to purchase this product.

As a budget PSU, it keeps things simple to keep the price down, and the power rating does still make it a consideration for stronger builds even if your choices are limited

PC Guide

The CX750 comes as a non-modular model, compared to the semi/full modular models seen in this guide. This means that you can’t replace the power cables, which limits what connectors you use to build with. In addition to this, the Corsair CX750 doesn’t come with some of the future-proofing features found on this list, like its lack of PCle 5.0. It is powerful enough for most high-end CPUs, however you will have to make do with just three PCle connectors.

What users say

A great way of deciding if a component is the right choice for your setup is seeing how other users have received it. By looking at reviews of the CX750 on Amazon, we can see that the majority of user experiences with the product are positive. Customers mainly mention satisfaction with the ease of installation, performance, and value of this product.

One customer states, “It’s modular, rock solid and very quiet. Everything is working better and the CPU and hard drive are noticeably scaling and working faster”, demonstrating how versatile this product can be. Another user writes, “It’s a solid choice for building a powerful, yet tidy PC setup” showing the simplicity of the product.

Features and considerations

The RTX 4080 Super requires a PSU with a minimum of 750W. However, it’s prudent to consider PSUs that offer a bit more headroom, especially for users who plan to overclock, add additional components, or future-proof their system.

Also, look for PSUs with an 80 PLUS Gold or higher certification, as these are more efficient, converting a higher percentage of the electrical energy into power for the PC while wasting less heat. This efficiency not only saves on energy costs but also contributes to the longevity of the PSU and system components by reducing heat output.

How much power does a 4080 Super consume?

The NVIDIA RTX 4080 Super typically consumes around 320 watts of power. This power consumption can vary based on the specific tasks being performed and any additional overclocking. When planning a build with this GPU, it’s important to factor in the power requirements of other components as well, particularly a high-performance CPU and any other peripherals.

Tom is a tech writer with a detailed view on ensuring the best buying advice, most useful information, and latest news makes its way into PC Guide's articles.