Okay so I posted previously, but that's old now. I have fully dusted the pc, the paste layer is about 3 months old, I even put a 3 by 3 foot fan on high blowing towards the open side of the pc (The side panel where it's not needed is always open to prevent a literal fire because of the heat.) It always reaches 80c then it gets to the deadly 90c, the AMD cpu's limit causing a emergency reboot. The games that cause this are subnautica and astroneer. (You might wanna go to http://www.systemrequirementslab.com/cyri to get the specs.) Thanks for any help.