Happening here as well, Display is Grey/Black and there is Audio Loop Stutter (The Audio Repeats itself).

I highly doubt 70-80° on the GPU is the Problem, I get 50° on my CPU.

i7-4790K (4,0 GHZ / 4,4 GHZ Turbo Boost)
ASUS GTX 770 DirectCU II
4 GB Ram (The Game doesn't utilize the whole Memory)
ASRock Fatal1ty Z97X Killer

Drivers are new. This is happening since 2 Days and I can imagine People getting mad when suddenly the DPS / Healer gets kicked out of the Game due of this.