Best PSU for RTX 4070 Ti

With the 50-series not likely to make an appearance until 2025, we thought we’d find the best PSU for the Nvidia GeForce RTX 4070 Ti, seeing as we’ll be stuck with the 40-series for a while longer.

So, if you’ve finally decided to make the jump to the 40-series, and made you’ve chosen the RTX 4070 Ti specifically, here’s the best PSUs from the CORSAIR PSU range. But first, here’s the bare minimum you need, just in case you’re using a particularly old motherboard or something.

RTX 4070 Ti SYSTEM REQUIREMENTS

PCIe 4.0 x16 SLOT (for best performance)

700W power supply or greater

MIN 3x 8-pin PCIe Connectors + Adapter provided / 450W or greater PCIe GEN 5 power cable.

As with other GPUs, the specific requirements can change depending on which manufacturer made the specific RTX 4070 Ti you have bought. Just to make sure we’re covering a wide range of these possibilities, here’s a list of some of the more common RTX 4070 Ti requirements. Note that this isn’t an exhaustive list, so if yours doesn't appear below, make sure to check before buying any of the PSUs we’ve mentioned further down.

Unsurprisingly here we see a higher TDP (Thermal Design Power) than the regular plebian RTX 4070. This means we must up the wattage of our recommendations commensurately. Of course, the PSU must handle everything in your system in addition to the 4070 Ti, and a smart consumer plans ahead so we’re going to slightly over spec the PSU. This way, future upgrades are less likely to necessitate another PSU.

When it comes the best option from the CORSAIR lineup, we must of course go with the RM850x SHIFT. Fully modular PSUs are the way to go these days, making the build process easier and keeping the system tidier. The SHIFT series of PSUs take this to the next level, however, as the cables connect out of the side, instead of the end.

This means that the cable runs across or around the back of the motherboards tray are more direct. Additionally, this also keeps the space adjacent to the PSU clear, which is handy as this is a common location for HDD mounts, as is the case with our very own CORSAIR 5000D.

Despite the ever-increasing size of modern GPUs, people are still managing to cram these things into impressively compact small form factor (SFF) cases—our CORSAIR 2000D is a great candidate for this, by the way. If you’re planning a small build, then you’ll need an SFX PSU, and the best option from the CORSAIR range is the SF850L.

Now, it’s well documented that you should keep your PC on your desk, instead of under it. This provides maximum airflow and minimum ingress of dust, cat hair, and other gross gamer granules. However, placing the PC on the desk means that any loud components will be all the more annoying.

So, a super quiet PSU is a good idea, and the CORSAIR RM850e is a great option if this is your main concern.

At the outset of this page, we said we we’re going to recommend 850W PSUs, as leaving some room for upgradeability is a clever move. However, if you’re uninterested in future-proofing or just want to keep costs down for this build, then you’ll be alright with a 750W PSU. Luckily, we make the RM750x SHIFT, so you can get all the features and benefits of the SHIFT range, at a more economic wattage and price point.