What PSU do you need for an GTX 1070?
The GTX 1070 draws up to about 165W 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 1070 paired with a Core i7-6700 / 6700K; if your parts differ, the calculator gives your exact number in seconds.
Paired with a Core i7-6700 / 6700K, this build draws about 350W at peak (165W GPU + 95W CPU + system). A 650W unit runs it at ~54% load. Absolute minimum: 450W.
| GPU GTX 1070 / 1070 Ti | 165W |
| CPU Core i7-6700 / 6700K | 95W |
| Motherboard + RAM + drives + fans Rest of system | 90W |
| Total peak draw | 350W |
Recommended power supplies
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FAQ
Is a 450W PSU enough for an GTX 1070?
It's the bare minimum, but we'd recommend 650W. This build peaks around 350W, 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 GTX 1070?
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.