I had the issue with a game and yes, it was fixed by updating it. However, that isn't what fixed the overall problem. The game was simply using the GPU 100% and after the patch that dropped to 80% or so.
However, two hours of Valley resulted in the same problem. 83c. The fix was simple, just reduce the power target down to 75%, reduce the max core temp to 75c and reduce the overclock from 235 (max) down to 200.
Bingo bongo, temps in the 50s, 56 being the highest, whilst still holding a minimum 1800mhz clock
Thing is, that isn't what people are going to be doing with these I feel. As I said, a 120 rad is simply nowhere near enough to maintain clocks over 2ghz with the power target and heat targets maxed. I hope EVGA have put some seriously strong pumps in these, because they are going to feel the heat something rotten.