I have used many drivers over the last few weeks trying to find something i can work with and i found one.
I'm using Driver 20.2.2. My Vega is rock solid. It's never performed better. With a massive undervolt.
P6 1552mhz @ 980mv P7 1672 @ 990 HBM 1050 @ 970mv +15% power target.
Sustained clock speed of 1630mhz and it boosts all the time to 1725mhz. Temps are very good at 65c gpu temp, 73c HBM temp and hot spot below 90c.
The one thing i have changed. I am not using Wattman or Adrenaline 2020. Just the driver. Boom!
@AMD Your drivers are fine. The added software you incorporate with the driver is substandard.
I suggest you rethink what you are doing before the Next Gen Navi launches. No point is making great GPU's if you cannot use them due to Adrenaline 2020.