I have the same problem, i even installed older drivers. The watch dogs 2 can not be played! Plz AMD fix the problem, thousand of users have the same issue! I have 14 days until i can refund the game from steam. First time i a have problem with a game!
Im having this issue also. Ive tried reinstalling the drivers, the game and even the OS (twice).
R9 380X 4Gb
16Gb of RAM