others on steam have been reporting similar issues, but with entirely different rigs.
example:
https://steamcommunity.com/app/435150/discussions/0/276237094324333992/I'll try the suggested "changed to non-exclusive windowed mode" and see if that helps.
edit:
yes, going "fake windowed" helped significantly. temps back down into the low 80s on the cpu, which is fine.
oddly, my framerate suffers a bit, but I can live with that.
