@Claymore, I don't know if anyone already had this problem. I have a 8 x RX570 8GB rig mining solo ETH, randomly one card (any card) drops to 22Mhs for minutes and then it starts again going to full speed. I have been seeing this for long time now, any advice?
Thanks
Does the fluctuation of the hash rate on the one card reflect in the pool?
I read it somewhere that when a correct hash is calculated by the VGA and sent to the pool, it may affect the hash rate of the card for just a moment.
Also, try to remove any OC that you have on that card and see if it solves the issue.