How long can I keep working it like this before the magic smoke leaks out and tries to kill me in my sleep?
Welcome to my laptop, dude. When playing games it stays at more or less a constant 97% until it shuts down without warning...
A bit weird since it should just force processes to slow down according to priority rather than quit on you. Might be an overheat failure but unless it annoys you enough to undervolt you're stuck with it (Not that you were looking for an answer anyway)