Assassin's Creed Rogue Crashes Upon Character Movement

I have an R9 390 graphics card. Assassin's Creed Rogue crashes in the very beginning of the game only when I move my character. I don't know why it's happening. I have the latest version. I even reinstalled it. And I even reinstalled it a third time without the patches. Still happening though.

Any advise?
 
NO, that's all good, temps are 70C. It's just the environment quality setting, it's a bug with the game. I have to play with it on low. And as said, a crash resulting only from walking obviously is a game bug rather than an issue with temps or spikes. And my PSU is high quality.
 
Actually aside from that small issue, the graphics and CPU side of things are very well optimized. Unity on the other hand is so bad I can't believe it. Not only do the graphics look only half as good (on the settings my card can handle), it basically stress tests the GPU which causes it to get quite hot and the fans to blow 90%.