Artifacting… on 4080?

CPU 12th gen intel i7-12700K Geforce 4080 Super 32 GB RAM

At a loss. Unsure what to do. I think this is called “artifacting,” but it looks like something else, too. Eventually, most times, it crashes to desktop after 30m, sometimes 1hr+. It rarely, if ever, happens in single player. I guess when grouped, there is just that much more effects going on, taxing (what component?) in my computer?

Is it bottlenecking somewhere? I’m running steam games off a different drive from my OS, if that matters. Both are SSDs…