What PSU do you need for an RX 6600?
The RX 6600 draws up to about 132W under full load. On its own that only tells half the story — your total system power (and so the PSU you need) depends just as much on your CPU, drives and cooling. This page sizes a supply for the RX 6600 paired with a Ryzen 5 5600 / 5600X; if your parts differ, the calculator gives your exact number in seconds.
Paired with a Ryzen 5 5600 / 5600X, this build draws about 298W at peak (132W GPU + 76W CPU + system). A 550W unit runs it at ~54% load. Absolute minimum: 400W.
| GPU RX 6600 / 6600 XT | 132W |
| CPU Ryzen 5 5600 / 5600X | 76W |
| Motherboard + RAM + drives + fans Rest of system | 90W |
| Total peak draw | 298W |
Recommended power supplies
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FAQ
Is a 400W PSU enough for an RX 6600?
It's the bare minimum, but we'd recommend 550W. This build peaks around 298W, and a 550W 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 6600?
80+ Bronze or Gold. It's the best balance of price and efficiency for a build this size. Never pair a good GPU with a cheap unrated PSU.