I found a working setup for my 6900 that has no ctd’s.
Using steamvr beta, 3kx3k res in steamvr(100%), 60%TAA render ingame(1900x1800 something), mix of high-ultra, and important, radeon chill limiter of 31fps.
Using openxr gives ctd’s. Also i found that openxr dev tools is bugged as of right now. At 100 oxr it shows a resolution of 2550 something but it should have been 3100.
Later edit: i changed to openxr after some more testing. I deactivated “use preview” and also deactivated reprojection. Now it is not bugged anymore.
I have no idea what happened, but now i don’t have ctd’s anymore.