Hi, try to use lower graphic setting, however it only lower the chance of crashing.
Unfortunately based on my experience with AMD video card I think is video card itself to have a problem.
I had 3 top AMD video card (all different models) and all of them at some point when stressed had regular driver crash. With the fist 2 video card the Support solution was to substitute them, and it got even worst (infact in both cases I had to buy a new video card). With my 3rd I didn't made the same mistake and I decided to keep it, with regular crashes, but working.
Try to google "amd driver crash" you'll find countless topic, no matter what model.
My final solution will be to change over Nvidia, expensive but reliable.