What PSU do you need for an RTX 4070?
Recommended PSU
750W · 80+ Gold
Paired with a Ryzen 5 7600 / 7600X, this build draws about 395W at peak (200W GPU + 105W CPU + system). A 750W unit runs it at ~53% load. Absolute minimum: 500W.
| GPU RTX 4070 | 200W |
| CPU Ryzen 5 7600 / 7600X | 105W |
| Motherboard + RAM + drives + fans Rest of system | 90W |
| Total peak draw | 395W |
Change the CPU, drives, fans and overclock for a precise number.
Recommended power supplies
MSI MAG A750GL (750W, 80+ Gold, ATX 3.0) ↗
Native 12VHPWR cable — ideal for a 4070-class card.
Corsair RM850e (850W, 80+ Gold, ATX 3.1) ↗The safe default for high-end single-GPU rigs.
GamerKit may earn a commission from links on this page — at no extra cost to you. We only list gear we'd actually recommend for the spec.
FAQ
Is a 500W PSU enough for an RTX 4070?
It's the bare minimum, but we'd recommend 750W. This build peaks around 395W, and a 750W 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 RTX 4070?
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.