I flash all my Linux machine cards to the desired voltage levels, and set clocks stupid low so I can bring them back up with aticonfig. Granted those cards are all Hawaii (and a Pitcairn lulz) mining ZEC so the idea of me using modern drivers with them is a bit silly. 15.12 for lyfe!!!!
Since you are probably using Polaris cards . . . your best bet is to ignore distro and look at the AMDGPU-Pro driver to see if it meets your needs. You'll get the same features out of that driver in Ubuntu or Fedora or Mint or anything, really. I don't think there's any distro-specific or even generic 3rd-party software for Linux that offers better voltage control. If there is, I am simply not aware of it yet.
On a more-serious note, ETH continues to rise in leaps and bounds while the BTC network is now plagued by an increasingly-large pile of unresolved - or "stuck" - transactions. Things could get interesting soon. Hold on to your hats, folks.