Hey,

Surprised to see that nobody has responded here. I have just reached a maximum of 14 GPUs all of them are GTX 1070s. I know how the manual recommends a certain combination of GPUs but those cards will become obsolete soon.

I have contacted Asus and it seems a workaround is utilizing a CPU which can support more PCIe lanes. I could be wrong since there may be a motherboard limitation although I am not certain of this. I also came here to BitcoinTalk to see if anyone else had addressed the same concern about this motherboard but have not found anything as of yet.

I will try using a newer processor to see if this allows me to use more than 14 GPUs. If you have discovered any information regarding this since you posted, I'd be glad to know!