Purchased the board, case, and server power supply.  All looking good so far, excited to not be using risers and if we can get this one rig going we'll be buying 8 more setups. 

Working on getting 8 GTX 1060 cards going on W10.  For some reason at cards 5 or 6 W10 starts to have issues.  Everything is solid and stable at 4 cards (sometimes 5) and mines with no issues at this point.

When cards 5+ go into the motherboard I get one of the following issues.

-Windows doesn't load at all.
-Windows will load and then flash on and off, no clickable actions.
-Windows will load and I just get the spinning circle.  I've let this run overnight thinking W10 is doing it's thing but no go.

I've reloaded W10 three times now.  Each time will load with on-board video and then add one gpu.  After Windows loads the drivers I load cards one at a time with a reboot in-between each. 

I've increased virtual memory as well with no go.

Any thoughts or help would be much appreciated.