I know it svcks to do so but in the Catalyst Control Center, under gaming , put the tesselation OFF. You still benefit from all the other great DX11 features

Now my game doesnt dip to 20 like crazy when facing a lots of brick walls and I can put everything else to ultra + High Res Textures

Maybe getting a better video would be the best option but I have a 5870, its not too bad