Claymore stopped working last week. I installed windows 7 and the nvidias work great. Altho you need to tweak Windows a bit to get all 6 gpus running. I also had aquite a bit of trouble getting my 7th rx580 to work.
I spent a whole day troubleshooting but it worthed it, rig is also 2mhs faster than in win10.
Ask me if for solutions if you need.