Prior to a recent Windows update, the hash rate was about 25 MH/s. After the update, I can't get anything above 11 MH/S. This is with Radeon RX580 GPUs and a Ryzen CPU. I am only mining on the GPUs. Radeon version 20.5.1 software is installed. I upgraded to version 20.8.2 and then it was less than 10 MH/s.