What PSU do you need for an RTX 4070 Super?
The RTX 4070 Super draws up to about 220W 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 4070 Super 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 430W at peak (220W GPU + 120W CPU + system). A 850W unit runs it at ~51% load. Absolute minimum: 550W.
| GPU RTX 4070 Super | 220W |
| CPU Ryzen 7 7800X3D | 120W |
| Motherboard + RAM + drives + fans Rest of system | 90W |
| Total peak draw | 430W |
Recommended power supplies
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FAQ
Is a 550W PSU enough for an RTX 4070 Super?
It's the bare minimum, but we'd recommend 850W. This build peaks around 430W, 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 4070 Super?
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.