What power supply do I need for the RX 6900 XT?

With a typical mid-range CPU the RX 6900 XT needs about a 750 W power supply (estimated load 520 W). With a 65 W-class CPU 650 W is enough; with a 250 W-class flagship CPU plan on 850 W.

How much power does the RX 6900 XT draw?

Rated board power is 300 W. Brief transient spikes can reach roughly 450 W, which is why we size the PSU with 30% headroom.

RX 6900 XT power supply requirements: what PSU wattage do you need?

The AMD Radeon RX 6900 XT is rated at 300 W board power. Short transient spikes can reach about 450 W, so the power supply must have headroom beyond the sum of the parts. Here is what that means with three classes of processor.

CPU class	Example	Estimated load	Recommended PSU
65 W-class (e.g. Ryzen 5/7 non-X)	Ryzen 7 9700X	465 W	650 W
125–180 W-class (mid-range K / X)	Ryzen 7 9800X3D	520 W	750 W
250 W-class (flagship Intel K)	Core i7-13700K	653 W	850 W

How we calculate it

Estimated load = CPU maximum turbo power + 300 W for the card + 100 W for motherboard, memory, storage and fans. We multiply by 1.3 for transient headroom and round up to the next common PSU size. Full details on the methodology page.

Connectors

Cards in this power class use the 12V-2x6 (12VHPWR) connector or three 8-pin PCIe connectors depending on the board partner. Prefer an ATX 3.x power supply with a native 12V-2x6 cable over adapters.

When to step up a tier

Heavy overclocking, custom water cooling, more than four drives or a lot of RGB each add tens of watts. If two or more apply, buy the next size up. Efficiency and fan noise are also best at 50–70% load, which the 1.3× rule already lands you in.