ill be blunt, You pointed me 3 motherboards with 6xpcie and one motherboard which i already mensioned i know of just to offer me Your product and i asked about none of those.
What i asked is MB with 7xpcie that someone already has/had and it works with 7gpu with no problem (i already have MSI Z97 gaming and its working great but has limited supply where im from), not 6xgpu mb, not additional multipliers and especially not complete rig for sale.
I know he posted a link to his rigs
But why would you buy an expensive mobo rather than a multiplier board? What is the thinking? You're doubling your mobo cost at least by trying to find a fancy one that can run 7 cards rather than a cheap one with multiplier.