What PSU do you need for an GTX 1080 Ti?
The GTX 1080 Ti 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 GTX 1080 Ti paired with a Core i7-8700K; if your parts differ, the calculator gives your exact number in seconds.
Paired with a Core i7-8700K, this build draws about 490W at peak (250W GPU + 150W CPU + system). A 1000W unit runs it at ~49% load. Absolute minimum: 600W.
| GPU GTX 1080 Ti | 250W |
| CPU Core i7-8700K | 150W |
| Motherboard + RAM + drives + fans Rest of system | 90W |
| Total peak draw | 490W |
Recommended power supplies
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FAQ
Is a 600W PSU enough for an GTX 1080 Ti?
It's the bare minimum, but we'd recommend 1000W. This build peaks around 490W, and a 1000W 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 Ti?
80+ Gold or Platinum. It's the best balance of price and efficiency for a build this size. Never pair a good GPU with a cheap unrated PSU.