What Power Supply Do You Need For RTX 40 Series Graphics Cards? – SlashGear

Nvidia issues official recommendations for power supply wattage for each of its graphics cards, although these recommendations technically only apply to its own Founders Edition graphics cards. Thankfully, Nvidia’s board partners usually follow them. Still, if you’re buying a card made by another GPU maker, such as MSI or Gigabyte, make sure to check that the recommended PSU is the same as listed below.

For the RTX 4090, which has a 450W total graphics power (TGP) that can go up to 600W at maximum, Nvidia recommends at least an 850W power supply. Depending on the rest of your rig, it might even be safer to buy a better PSU, though — if you’re using one of Intel’s or AMD’s best processors alongside a bunch of other high-end components, you can even buy a 1000W PSU to leave some breathing room. Most PC builders will recommend Gold or Platinum PSUs at this stage, and ATX 3.0 should be the standard to follow at this point. 

Moving on to the RTX 4080, which has a much more conservative 320W TGP, the recommended PSU drops to 750W. Once again, it might be better to leave some extra room here, especially if you’re looking to overclock.

The RTX 4070 Ti has a 285W TGP and calls for a 700W power supply, while the RTX 4070 settles for 600W. Realistically, however, if you can afford to buy a new PSU, it might be worth it to aim for 700W instead of 600W.