What PSU do you need for an RTX 5070?
The RTX 5070 draws up to about 250W under full load. On its own that only tells half the story — your total system power (and so the PSU you need) depends just as much on your CPU, drives and cooling. This page sizes a supply for the RTX 5070 paired with a Ryzen 7 7800X3D; if your parts differ, the calculator gives your exact number in seconds.
Paired with a Ryzen 7 7800X3D, this build draws about 460W at peak (250W GPU + 120W CPU + system). A 850W unit runs it at ~54% load. Absolute minimum: 550W.
| GPU RTX 5070 | 250W |
| CPU Ryzen 7 7800X3D | 120W |
| Motherboard + RAM + drives + fans Rest of system | 90W |
| Total peak draw | 460W |
Recommended power supplies
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FAQ
Is a 550W PSU enough for an RTX 5070?
It's the bare minimum, but we'd recommend 850W. This build peaks around 460W, and a 850W unit keeps it near 55% load — the efficiency sweet spot — with headroom for the GPU's transient spikes.
What efficiency rating should I get for an RTX 5070?
80+ Gold. It's the best balance of price and efficiency for a build this size. Never pair a good GPU with a cheap unrated PSU.