From everything I have heard, Windows cannot handle more than 8 cards using the same driver. For example, 8 AMD and 4 NVIDIA cards should work, but 10 of the same card I don't think will work on Windows.
However, EthOS, linux, SimpleMiningOS etc. have been reported to work with 12 cards.
However, EthOS, linux, SimpleMiningOS etc. have been reported to work with 12 cards.
All of them are 12 NVIDIA Google P106, I have tried EthOs but black screen all the time
Do you mean that you can have 10 x p106 to work in Windows 10 without an issue? This is weird because windows driver should support maximum 8 cards in the same type only. Maybe the clue is on your setup, please tell us more details on your settings, nvidia driver version, etc?