I'm unable to complete a race in Dirt Rally without the game closing down and a Radeon settings error crash message appearing.
I just tried Dirt 4 which seems okay so I've put a ticket in for Dirt Rally.
I'm using the 17.12.2 driver (newest one).
Also, I'm on Win 10 pro.
I know it's a pain, but is there any chance you could try 17.11.1 and see if the game still crashes and run the superposition benchmark. Then try 17.12.2 and see what happens.
Because I am just after trying the 17.12.2's after saying I wouldn't and I still get the performance drop but, the 3d mark doesn't crash anymore for me.