Okay I do not want to take from the op
but here goes it has worked well running evga 1070 ti hybrids I want it to run eight evga 1070 ti hybrids.
I got my 7th one today. the build is open case.
the board has 7x 6 pin pcies in
the board has 13 6 pin pcies out
it is a great board to run 1070's that have 1 pcie jack
it is a great board to run 1060's that have 1 pcie jack.
op has a good case idea for farms
not homes.
if he sold me a case I would want 8 of these cards in it
https://www.evga.com/products/product.aspx?pn=08G-P4-5670-KR set to 130 watts tdp
https://www.evga.com/products/product.aspx?pn=08G-P4-5170-KR set to 120 watts tdp
case would pull 1000 watts dc for 1070
case would pull 1100 watts dc for 1070 ti
it has 7 jacks in so 1100/7 = 157 watts a wire
if you have a server psu you could feed 7 input jacks
don't use the output jacks use 8 cables to the 8 cards from the same internal psu.
that lowers draw on the 7 jacks in.
I linked blower style cards for a reason
combined with the 6 case fans they would work well to cool the case.
I don't think this would ever be a quiet case but in a warehouse on in my solar array loft it would be good.
As you seem to have seen some different motherboards of this style, which has the largest spacing between GPU's?
The too close spacing is my main concern.