Skyrim SE constant crashing. Please Help.

Purchased Skyrim SE + Anniversary for summer sale. Installed on internal deive. Set everything to Medium. Has been constantly crashing. Graphics freeze, screen shutters on and off, audio sometimes keeps going. Usually happens when using a menu, or when there are more than 2 npcs in an area. SteamOS looks like it crashes and restarts. Things I have tried: - Deleting Proton Data - Forcing Proton Versions use - Installing and using Proton GE - Lowest settings - Verify Files - Uninstall/Reinstall. - Start without anniversary edition - Reboot System

I do have a ticket in with valve, but their responses have been slow. Any help is appreciated.

EDIT: Zero Mods installed.