I dont get i work with 7 GPU.
I enabled 4G and Generation 2 in the BIOS. No changes else
Only get 4 to work.

My Hardware
7x RX480 8 GB
7x Powered Riser
Asus Prime Z270-a
8GB RAM
60GB SSD Sata3
Windows 10 Pro
AMD Driver 16.11.5

Any idea? Is it working only under Ubuntu?
Help very recommended?