I was able to get 12 Nvidia cards working last night with Claymore for Ethereum.
10 - GTX 1070 (26 MH/s each)
2 - GTX 1060 (19 MH/s each)
Before I was having trouble with EWBF Zcash miner.
What BIOS mods did you need to make to get it to work? Not even getting mine to boot yet with that many.
Yaa.. i have 1070 and still hang.. how u can ?