The amdgpu-pro v17 never worked for me on OC/UV. I've heard crimson drivers, but with older linux, did work... never tested.
So which one you are using currently ?
I use V17.50 but for overclocking I use bios flashing, and I don't undervolt (too bad).
Well, power consumption is important, its pulling lot of power on wall without undervolting.
Flashing bios for higher clock is what I wanted but not really understood how to do, specially undervolting.. Say I want to undervolt 900 mV , but numbers there are 65423 ...
Any link or indepth guide for bios modding ?