I was using lastest Crimson 16.5.3 driver and when I was playing Overwatch I noticed artifacts in some 3D graphics.
Then, as suggested by another user, I unistalled this version and I installed Crimson 15.12. The graphical issue just vanished.
I'm just reporting it because is kinda bad using old drivers because the new ones is bugged.
Please AMD solve this and release a new version without this problem!