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"Power Limit can be increased or reduced by +/- 20-100% and should be set to the maximum value when increasing GPU or Memory clock frequency."
That % increase is set by the card manufacturer as the default (0) setting...30% or 50% each suspend the power limit management and allow the card to perform at it's maximum intended design.
That's the step I don't want to follow, because when I contact them they will ask for the card, and I don't have any other GPUs to use at the moment, and as you know Ryzen 5 1500x does not come with integrated graphics. However, if I cannot find a solution I will have to send the card.
Thanks for the help by the way.
Well that certainly explains why it seemed like a power issue but none of the usual software fixes worked. Glad you got it going. Thanks for replying back with the fix.