3. For voltage use AB, it is working well. I personally test, voltage control working fine via AB, fan control to, just gpu/mem clocks need to be used via Clymore commands.
What afterburner version are you using? cause I tried 3 and nothing on sapphire rx 480.
I am using standard version, one from MSI site, I think it is 4.3.0. Working well for voltage and fan speed, the rest of options not available with this driver, I also think with last official to(someone can confirm this for 17.7.2), so I don't think that, even if tomorrow there will be official amd release of this driver, this problem with AB will be solved soon. Only in case if MSI release new version.
http[Suspicious link removed]/vga/MSIAfterburnerSetup.zip