Here is the screen shot of setting I am using on the Wattman for the Vega 64.
As explained in the previous post, I have been using these settings for some time now on my custom liquid cooled Vega 64.
https://www.techpowerup.com/forums/threads/vega-owners-club.236314/page-2#post-3716160
I have increased the voltage from 1075mv to 1085mV over the course of time. 1075mV was unstable in some very few cases.
With 1085mV the Vega 64 is rock stable for many weeks now. The highest GPU temperature in gaming that I ever get is 42°C.
The power consumption is about 25W higher than the balanced mode, but performance is much better.
The average clock speed of the GPU is always in the range of 1620MHz or higher depending on the games.
In Witcher 3 average clock is around 1620MHz and Battlefield 1 at around 1638MHz.