I am on the latest 4004 bios for the ROG Crosshair VIII Dark Hero. I have 2 RTX 3090 cards set up and working properly with NVLink. I have noticed that when I disable WiFi in the BIOS it causes Windows to Code 43 on the 2nd card. Its not a huge deal, I just enable WiFi again and its working again, but it would be nice to disable it permanently since I am using ethernet.
If anyone else has a similar configuration maybe try disabling WiFi and see if it is repeatable.
Does ASUS read these posts?