Perfect solution for SMOS would be to have additional two fields (OC page) related to mem/core voltage but as I understand it's not possible. Right?
Its a limitation of the AMD Linux drivers, nothing tytanik can do about it.
Me and cryptoscum will be working with this computing kernel and driver to meaby fix this power wattage issues.
I am starting to love nvidia over amd but nvidia also has some stupid limitations

I have not tired EthOS but it looks like they have something in change logs for latest update.
Major Changes:
Increased RX series hashrate by fixing hashrate drops caused by DAG growth.
Added ability to set voltage for RX series GPUs. <<< i cant validate this but since its also ubuntu maybe figure out how they did it (if it works)