I'm doing a new windows install to hopefully sort it out. It doesn't crash in anything but 3dmark but did crash in seige once with a blue screen so fresh one it is
Power spiking maybe? You never know i would add power supply, unstable oc to the list the 2080ti might push the cpu a tiny bit harder you never know. And we already suggested a format or a gpu going bad. Hopefully it is just windows being a pain i know that for RTX you need an update i personally do not think i have so i should have fun with that.