This board is driving me nuts! I had big problems getting just 2x ZOTAC 1080GTX to run,but managed in the end by putting them in specific PCI slots. Now I have a extra 4 cards, but I never get more than 4 recognized (most of the time I get just 3).

Tried all the tips, running latest F25 BIOS. I need to enable CSM or my SSD will not boot on the SATA port.

Will sell the full rig out of frustration soon, but before I do, any final clues?

Help rewarded....