6950XT can undervolt quite well. Not sure this argument works here.

As a matter a fact all RDNA2 card can uv if you spend time with them. Its the same 7NM TSMC process across all of them. (Not 7800xt, just rdna2).

What stands out to me is how the 6590x is using only ~25watts more while providing a lot more perf in most titles - apart from RT.

Resident Evil part really shows this well.