Undervolting Mining GPU working on linux

I´m using a special version of Linux, called ETHOS on my rig mining Ethereum. ([login to view URL] ) My rig have 2 types of GPUs: Asus RX470 Mining 4GB and MSI RX580 Gaming X 4GB. I need to setup on my Ethos, a way to UNDERVOLT the GPUs, something simple to do in Windows, but complicate for me to do in Linux. I expect a way where I can "setup, how much volts I want to undervolt for each GPU on the rig". I can offer full acess to my system using Teamviewer. Regards, Darley Cassimiro PS: Try to seach on google "undervolting gpu on linux"