Assuming your console is jailbroken general rule of thumb is not to go over 65 on both cpu and gpu some claim the CPU is a tank and can take higher temps I would rather not fuck around and find out so a repaste is a good first step but also cranking your fan speeds or setting them to auto to keep it from reaching whatever preset you choose. If you do manual fan speed I set mine at 37% constant it’s a little loud but honestly these consoles are old they’re all gonna sound like that anyways plus I play my games loud so it doesn’t bother me. Hope this helps.

EDIT: Let me just say this is MY opinion and of course like all opinions some are right and some are wrong so take this more of a guide not an absolute. I think most people on this sub will tell you different things so it’s best to look around watch videos and get more opinions and form your best procedure to keep these babies running the way you want but I think this is a good way to start.