Tser

So, I installed 591.74 Studio driver and H22.0.423 is stable again using the 2080ti as the monitor driver with the new UI, so will keep testing...
Update:
After spending many hours editing geometry, creating new geometry, modifying, editing materials and rendering (with XPU on the 5090's only), absolutely stable with no crashes, very happy...
I also reset my bios before the testing, just to cover all bases.

I have absolutely no issues running H21 with the 2080ti, so it must be the 2080ti with H22, both with the old or new UI.

Speak too soon, after a bit of editing... crash, so back to the 5090...