you talking about CPU or GPU temperatures?
If CPU 80C is too high
GPU as I said earlier.
I acutally checked one more thnig:
I started a free benchmark (3DMark) and it crashed about half way through.
When I manually turned on fans on 100% it managed to the end.
I am now 95% sure it is problem with temperatures, but I am still wondering what might change through this whole process of installing drivers.
I am sending it off on warranty and the problem is probably solved.
If the in-case temperature is not the culprit (too high) then you're probably right.