Interesting! I also have a 5070ti and a comparable CPU. I'm wondering if something is artificially choking the program. Is the program itself maxing out on your task manager? Also anything weird found in the logs? (%APPDATA%\Godot\DesktopPets\Logs)
i checked task manager and it seems to be fine there, looking at godot.log theres a bunch of errors in the logs, idk how to give the full file here but this is a pic