What PSU Do You Need for the AMD Radeon RX 6600?

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

Why 450W and not less?

The AMD Radeon RX 6600 has a board power of about 132W, 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 450W is the comfortable target. The AMD Radeon RX 6600 draws power through a 8-pin PCIe 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 6600?

A 450W 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. 400W is the realistic minimum for a single-GPU build.

Is a 400W PSU enough for the AMD Radeon RX 6600?

It can run a modest build, since the card itself peaks around 132W, but it leaves little headroom for a power-hungry CPU or transient spikes. Stepping up to 450W is the safer, quieter long-term choice.

Does the AMD Radeon RX 6600 need an ATX 3.0 power supply?

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