Newbie question, I have several rigs on linux running claymore without any problem, however I just install claymore on my PC and I cannot modify the gpu mem or core voltage on a R9 390 Powercolor 8G but I can OC the core via -cclock. Is this normal? I read on the web that I can change mem and undervolt using MSI AB but my card dont want to take the underclock. I am using Crisom 15.12. In the OP say that AMD block underclocking so that the reason for claymore miner to not accept -mclock but using MSI AB should I can?

Thanks