I am using RTX 3080 from Palit, they have mixed caps and been mining stable,
I have it setup mining 101Mh/s at 199,4W (54% power limit), can provide proof if interested
199,4W is nowhere near 54% power limit. Palit game rock is 320w at 100%. 54% would put it at 173w. then again at 54% power limit I don't think it would hash at 101 MHs.
Could you attach the screenshot for miner and gpu-z?