Crossfired Sapphire Fury's here with the Club3D adapter and still having the same problem. Using CRU to manually set to 60Hz just results in black screen.
yep it does feel as though AMD is on its last leg, especially how the GTX 1060 is cheaper, more powerful, cooler and obviously has better driver support then AMD's RX480.
i will suggest just roll back to the driver "THAT WORKS"
i stopped updating my drivers to be honest 16.9.1 works fine for all the games i play, so i am not planning on updating until i have issues with those drivers. Just roll back your drivers.
Have you reported the issue on crimson software?