What PSU do you need for an RX 7800 XT?
The RX 7800 XT draws up to about 263W 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 RX 7800 XT paired with a Ryzen 5 7600 / 7600X; if your parts differ, the calculator gives your exact number in seconds.
Paired with a Ryzen 5 7600 / 7600X, this build draws about 458W at peak (263W GPU + 105W CPU + system). A 850W unit runs it at ~54% load. Absolute minimum: 550W.
| GPU RX 7800 XT | 263W |
| CPU Ryzen 5 7600 / 7600X | 105W |
| Motherboard + RAM + drives + fans Rest of system | 90W |
| Total peak draw | 458W |
Recommended power supplies
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FAQ
Is a 550W PSU enough for an RX 7800 XT?
It's the bare minimum, but we'd recommend 850W. This build peaks around 458W, 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 RX 7800 XT?
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.