Last update, I was able to get 8 GPUs running using both m.2 ports with adapters. I'm not even using PCIE_X1_2 anymore. It will just be a free slot on the board, I could never get it to recognize a card. You must disable the 3.1 front usb in the bios and select the PCIE ports. Also set the m.2 to use PCIE.

Good luck!