So I took the suggestion from some of you and placed HiveOS on one rig.  It appears that I have it up and running and it's mining ETH via lolminer.

It's going at 21.  So about the same as what it was on Windows with no overclocking settings.

What would you suggest for AMD RX570 8GB cards?  I'm using one of the more popular templates suggested.

And how do you undervolt the power?  it doesn't seem to accept a "-10"