There are many posts on the subject, this is one of the official replies (there are others similar) :-
Depending on what problem you are having, there are alternative solutions.
For OC/fan control, disable Wattman (Preferences > Restore Factory Defaults), use Afterburner.
Some AIBs' may have newer Vbios update posted, or contact their Tech. support.
I run my 390 without wattman, and only use ab on some games for fan control.
Maybe amdmatt or ray_m have more updated info ?
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