I have 5 Nvida Rigs but I am new to AMD GPUs. I just picked up some Power Color Red Dragon RX 570 4GB for cheap but I cant seem to get more than 20 Mh/s

I am running the Aug 23 Blockchain drivers , I have tried several moded bios, I ran the atikmdag patcher but it stays at 20 Mh/s no matter what I do? What am I doing wrong?