I have 10x 1070 on win 1709. The rig is not stable. When I pull out 2 cards, it works pretty much fine. Tried various things. Nothing helps. My screen freezes after some time. That's the major problem.
The system was able to detect 10 GPUs even on the normal win, without fall creators update. (1709)
I use windows 1709 and 17.11.4 driver or maybe 17.11.1, and using 13 RX mixed, run smooth with gatelessgate, don't know why cant use sgminer.