https://bugs.freedesktop.org/show_bug.cgi?id=109887
--- Comment #9 from Andrew Sheldon asheldon55@gmail.com --- Here's a linux pp table editor that also seems to support more options (such as raising the power cap) than OverDriveNTool: https://github.com/amezin/powerplay-table-editor
I will note that you might still see raised voltages if you do a too aggressive overclock/undervolt with modded PP tables, but it seems to only overvolt as much as is needed (say 975mv -> 1.05V) if you set a too high clock, rather than jumping to the maximum possible voltage that you see by editing pp_od_clk_voltage.