Windows 10 accepts 8 video cards per driver, which means, 8 nvidia and 8 amd, however you will have to choose which one will be primary or if you want you go with intel or amd integrated gpu but then you will need a cross driver software to control them.
Ok thanks for the info. Its seems little complicated to me. I guess I'll stick with the same driver.
Can we run different nvidia cards like 1060, 1070 and 1080 on a single mobo? I am planning to use MSI z270 gmaing pro carbon.