Can anyone share how you get the 8th GPU to recognize on this? I have RX580 Nitro+ 8GB cards, Asus Z270-P. I have 2 M.2 to PCIe converts. It seems to only recognize 7 cards. I have tried adjusting all (gen1-3, auto, PCIe...)settings and even disabled everything I am not using. Any light on this matter would be greatly appreciated.