I fucking love this AMDGPU driver - with it, I can control everything shown here and more (NSFW):
http://ottrbutt.com/tmp/custom-editor.jpgVoltages, clocks, changing DPM state settings, the state table that tells it what DPM to go to at what state...
It turns out I have to change "POWERLIMIT"?
Ubuntu itself is limited, and therefore jumps heshrate. She does not respond to the settings which are stitched in the BIOS. With windows no such problems.