Thanks for replies. I am mining Bitcoin Private so this is my miner for now. Have RX470s. We will see about those new ASICs and possible forks ala Monero. AMD Blockchain driver has not served we well. Seems they only put out a beta version and then walked away from it.
With Claymore's ZCash AMD GPU Miner the notes recommend AMD drivers 15.12 or 16.3.2. In 2018 are these still the best AMD drives to use or should we use newer versions of AMD drivers?