Hello! I ran into a problem with my Msi Z270-A motherboard, so I am using 6 Asus dual 1070 OC graphics cards, and only 5 of them are being picked up. The second pci-e riser doesn't seem to be working. I tested the port, it does work and I have tested the riser cables, they all seem to be working. I am a little bit of a loss for words on what I should do to fix this problem.