What PSU Do You Need for the AMD Radeon RX 7900 XTX?

Recommended wattage, the realistic minimum, and the connector you need — with a live peak-draw estimate.

Why 850W and not less?

The AMD Radeon RX 7900 XTX has a board power of about 355W, but it can spike well above that for milliseconds at a time. Add a typical gaming CPU and the rest of the system, then keep the supply in its efficient 50-80% load band, and 850W is the comfortable target. The AMD Radeon RX 7900 XTX draws power through a dual 8-pin connector, so any quality unit with the right PCIe cables works; an ATX 3.x unit is still a nice-to-have for transient headroom.

Frequently asked questions

What power supply do I need for the AMD Radeon RX 7900 XTX?

A 850W 80+ Gold unit is the recommended choice; it covers the card’s peak draw plus a transient-safe buffer and keeps the PSU in its efficient load band. 800W is the realistic minimum for a single-GPU build.

Is a 800W PSU enough for the AMD Radeon RX 7900 XTX?

It can run a modest build, since the card itself peaks around 355W, but it leaves little headroom for a power-hungry CPU or transient spikes. Stepping up to 850W is the safer, quieter long-term choice.

Does the AMD Radeon RX 7900 XTX need an ATX 3.0 power supply?

No — it uses standard dual 8-pin power, so any quality PSU with the correct PCIe cables is fine. An ATX 3.x unit simply adds extra transient headroom.