What PSU do you need for an GTX 1080?
The GTX 1080 draws up to about 180W 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 GTX 1080 paired with a Core i7-7700K; if your parts differ, the calculator gives your exact number in seconds.
Paired with a Core i7-7700K, this build draws about 375W at peak (180W GPU + 105W CPU + system). A 700W unit runs it at ~54% load. Absolute minimum: 450W.
| GPU GTX 1080 | 180W |
| CPU Core i7-7700K | 105W |
| Motherboard + RAM + drives + fans Rest of system | 90W |
| Total peak draw | 375W |
Recommended power supplies
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FAQ
Is a 450W PSU enough for an GTX 1080?
It's the bare minimum, but we'd recommend 700W. This build peaks around 375W, and a 700W 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 GTX 1080?
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.