Best PSU for RTX 3090 Ti 2024

What’s the best PSU for RTX 3090 Ti? Here’s our top picks.

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A power supply unit (PSU) is often an overlooked component when it comes to PC building. Everyone’s talking about the best GPUs, like the Nvidia GeForce RTX 3090 Ti, or the new RTX 4090. And many people forget the need for a powerful PSU that can give enough power to these GPUs so that they can work at optimal performances. Because if they receive less power than they need, they won’t work well. Nvidia recommends a minimum power of 750W for the RTX 3090 Ti. So it’s essential for you to choose a PSU that can deliver 750W or more. This can be quite a significant investment for some people, so before buying an RTX 3090 Ti be sure to buy a PSU that can make it work. We are going to give you some more expensive, as well as some more budget-friendly choices.

Best PSU for RTX 3090 Ti

Corsair RM1000x

Corsair RM1000x 80 PLUS Gold Fully Modular ATX 1000 Watt Power Supply







ATX 3.0


So as we’ve discussed previously, the RTX 3090 Ti needs at least 750W of power to work optimally. The first PSU on our list is the Corsair RM1000x, as the name suggests, it has a 1000W power output, which is more than enough. It has an efficiency rating of 80+ Gold. And if you dread cable management, don’t worry, it has a fully modular design that makes cable management a breeze, and it comes with a 7+ year warranty, providing peace of mind that your investment is well-insured.

Next best PSU for RTX 3090 Ti

Corsair RM850x




80+ Gold


Fully Modular

Another excellent choice is the Corsair RM850x 80 PLUS Gold, which is 850W, which is still well above the recommended 750W. This was also made for low-noise operation and has a zero RPM mode which means that at low and medium loads the fan switches off entirely for silent operation. And it also has fully modular cables, no more headaches when managing your cables.

Best Budget PSU for RTX 3090 Ti

Corsair RM750, RM Series, 80 Plus Gold Certified, 750 W Fully Modular ATX Power Supply




80+ Gold


Yes- fully

The best budget award goes to the Corsair RM750x. This is probably the cheapest PSU on the market, no wonder why this had to make the list. You can buy this PSU for around $100 on Amazon. It has the recommended 750W for the RTX 3090 Ti. It’s highly recommended to get a higher-performance PSU, but this should work fine too. One of the cons of this unit is that if you want to upgrade your PC, you need to buy a new PSU.


If you want to get the most out of your GeForce RTX 3090 Ti, you need a PSU that can give enough power to the GPU. The bare minimum by Nvidia is 750W, but you can’t go wrong with a more powerful PSU especially if you want to power more than one GPU, or if you are planning to buy a high-performance component like a CPU. But before choosing the right PSU, it’s very important to look at the pros and cons of each model, because every gaming setup is unique. Remember to also keep your power needs for other components and not just your GPU.

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