Mining, Overall Performance, Energy Efficiency
The meagre card bandwidth plays against it for mining. You'd be better advised to look at other cards if crypto performance is important.
This graph takes in the relative performance, across all games, when compared to the baseline numbers produced by the fastest card, RTX 3090.
As we suspected, the PowerColor card performs more closely to the RTX 3060 than to the RTX 3060 Ti. The numbers continue to go against AMD as the resolution rises.
But taking the same relative performance into account and dividing by the observed system-wide power consumption reveals the RX 6600 XT is nice and efficient. That is what you get when a leading-edge die is purpose-built for a GPU.