Tried 19.5.1 driver today with +50 power. Still crashing. I'm returning the card.
Update. System works fine now.
Card returned few days ago, MSI said the card is fine, but they still reapply the thermal paste for me.
Update the driver to 19.5.2. So far so good.
great that your MSI card is working now. But I suspect they did more than just replace the Thermal paste. If your card starts working with the previous AMD Drivers than it was definitely the GPU card that was defective in some ways.
But that is besides the point. At least now you have a good working GPU card.