There is a driver issue for this game, I suggest playing another title and see if that works
It may be a while before AMD manages to fix all the problems, they are aware of the problems
use 15.10 beta for now until the next one surfaces
Same card here, same problem.
The game crashes after driving around and shows low quality textures just before the crash.
I contacted Rockstar Customer Support and they suggested to try a previous driver version.
But I've already tried several driver versions including 15.10 Beta without any solution.
I don't know which side is the problem, but it is a shame that such big companies don't not care about their customers.
Windows 10 has its own share of headaches over and on top of flaky video card drivers