>>413000437
For the 7900XTX? Pic related is the short version, full review is here.
https://babeltechreviews.com/hellhound-rx-7900-xtx-vs-rtx-4080-50-games-vr/5/
There are apparently some comparisons between the Windows and Linux drivers that make it pretty clear it's a driver issue, but I don't expect it to get resolved any time soon.