What PSU do you need for an Intel Arc B580?
The Intel Arc B580 draws up to about 190W 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 Intel Arc B580 paired with a Ryzen 5 5600 / 5600X; if your parts differ, the calculator gives your exact number in seconds.
Paired with a Ryzen 5 5600 / 5600X, this build draws about 356W at peak (190W GPU + 76W CPU + system). A 650W unit runs it at ~55% load. Absolute minimum: 450W.
| GPU Intel Arc B580 | 190W |
| CPU Ryzen 5 5600 / 5600X | 76W |
| Motherboard + RAM + drives + fans Rest of system | 90W |
| Total peak draw | 356W |
Recommended power supplies
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FAQ
Is a 450W PSU enough for an Intel Arc B580?
It's the bare minimum, but we'd recommend 650W. This build peaks around 356W, and a 650W 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 Intel Arc B580?
80+ Bronze or 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.