I have a MSI Z170A Xpower gaming Titanium Edition mobo with 7 pcie slots, could only get 3 cards to run it, any ideas?
Have ASRock H97 Anniversary LGA 1150 as well running 6 290's and Asrock B150A-X1 with 5 slots, but can only get 4 390's to run on it.
I've gotten two b150a-x1 to work with 5 cards, you need to set pcie to gen2 for all slots and alocate 3.5gb resources to vgas in bios. Also, disable sound from bios, else you might get no resources available.