Anybody else having problems with their GPUs?

My R9 Fury X started behaving really strangely. It idles at 65C instead of 27, and as soon as I start mining/playing a game it starts overheating, and after a time the computer just stops.

My rigs are totally fine, but the thing why I think it is related to mining is because I was running 6.0 on my computer when it restarted for the first time (this morning) and since then I can not make it work again.

I tried with a different windows, and I got the same behaviour. Any ideas? (the GPU is still under warranty so I am not worried)