I used Asus Prime Z270-A, MSI Z270 SLI PLUS and Gigabyte H110-D3A.
Between these 3 mb in my opinion Gigabyte is the best - low price and at least same performance as Asus and Msi. You can plug in max 6 cards.
I like the Z270 options, but, for just mining... dont you think they are overkill? You dont need so many overclocking/tuning options?
Yeah they are overkill for mining
few months ago it was really hard to get mobo/gpu in my country so i took anything for a reasonable price... As I said Gigabyte H110-D3A which I bought later is perfect for me... Made for mining and low price...