Conversion to risers has begun! 12 Risers came in the mail, and some more cards.
The MB in my media server is an MSI X99 Gaming 7
https://us.msi.com/Motherboard/support/X99A-GAMING-7.html. It has already has 6 PCIE slots! My plan was to leave one GPU in the case and have 4 cards outside the case connected via risers. But for some reason, I couldn't get get the MB to see the 5th card

Do all the cards need to be connected via risers to see more than 4 cards? Is it the order that they are in?? Very strange. Also, i am at capacity of my UPS...Could this have something to do with it?
Slot 0 GPU
Slot 1 empty (cant get to it)
Slot 2 GPU
Slot 3 GPU
Slot 4 GPU
Slot 5 MB wont detect

Thoughts?