What power supply does the RX 7800 XT need?
The RX 7800 XT draws 263 W on its own. Here is what that means for the supply you buy, and why the answer is not simply that number.
650 W
For a complete system drawing about 418 W under load.
Where the watts go
| Graphics card | 263 W |
|---|---|
| Processor (mid-range estimate) | 105 W |
| Board, memory and storage | 50 W |
| System under load | 418 W |
The recommendation adds 25% over measured draw. That is not padding: a supply run near its ceiling sits in the least efficient part of its curve, and graphics cards draw in microsecond spikes well above their rated figure.
Different processor, different answer
This page assumes a mid-range CPU. Pick your own parts and the calculator works the total out for your machine.
Open the calculator