Yes it is possible and works.
1) check that the pins match on the adapter and the media.
2) Update the BIOS before revision F6a https://www.gigabyte.com/MicroSite/462/images/BIOS-Z270P-D3.zip
3) Set some setting in the BIOS
4) Enjoy of working 7 GPUs
1) check that the pins match on the adapter and the media.
2) Update the BIOS before revision F6a https://www.gigabyte.com/MicroSite/462/images/BIOS-Z270P-D3.zip
3) Set some setting in the BIOS
4) Enjoy of working 7 GPUs
Thank you so much! Should it work with F5 BIOS? After upgrading to F6 i had boot problems... Had to roll back to F5.