I am not sure if this will help at all, but I had a similar issue with Ark a while back. It kept happening again and again. I tried everything I could think of, but didn’t manage to resolve the issue at first. I reverted my graphics drivers to older versions several times but this didn’t help at all. It reduced the crashes somewhat but didn’t cure the issues.
The strange thing is that I bought a new SSD for my system and cloned my hard drive in order to move my OS. This cloning process did not clone my my virtual memory or paging file as it is called, and my issues were completely resolved after the new SSD was in use for my OS (windows 10).
The issue did appear one time since with Ark, but setting my system to use no paging file, restarting it and then setting the paging file to system managed again, resolved the issue once more.
I am not sure it will help you, but it’s worth a try.
Until now I haven’t had a single issue with crashes in Atlas at all.
Terence, I never thought about changing my GPU's frequency. Smart idea man.