A chip that is overheating will crash way before it burns.
Please remember where your "temp info" is coming from. The sensor is on the chip, while the wiring is on the mobo. No time was spent calibrating, so chances of an accurate reading are slim.
If you want to know if you are okay, join the THG folding team. Folding will load your chip to 100% and run until you say stop. If the chip has any problems, folding will crash, way before you get any other indication.
If you can handle folding for 48 hours, you are fine.