What PSU do you need for an RX 7900 XTX?
Recommended PSU
1200W · 80+ Gold or Platinum
Paired with a Ryzen 7 9800X3D, this build draws about 565W at peak (355W GPU + 120W CPU + system). A 1200W unit runs it at ~47% load. Absolute minimum: 700W.
| GPU RX 7900 XTX | 355W |
| CPU Ryzen 7 9800X3D | 120W |
| Motherboard + RAM + drives + fans Rest of system | 90W |
| Total peak draw | 565W |
Change the CPU, drives, fans and overclock for a precise number.
Recommended power supplies
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FAQ
Is a 700W PSU enough for an RX 7900 XTX?
It's the bare minimum, but we'd recommend 1200W. This build peaks around 565W, and a 1200W 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 RX 7900 XTX?
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.