Yeah, I tried all the usual things. I've got an AMD R9 200 series card. I messed around with app specific settings on the gfx card too, but no luck.
In the end, I loaded the game on an old machine that's running XP and it works fine there. It's not as comfy playing at that machine (chair etc..) as my main PC, but I guess that just makes it more realistic.
Cheers!