[Solved] run 6 GPUS in Gigabyte Z170x - gaming 3 , ubuntu 16.04 , headleass mining

i was trying from somedays to activate all 6 gpus in this board, but when i plug 6'th gpu ubuntu won't boot up.

so finally i upgrade the bios of gigabyte Z170x - gaming 3 to version F21 and all works fine now.

here is bios link : http://download.gigabyte.asia/FileList/BIOS/mb_bios_ga-z170x-gaming3_f21.zip

have a headless mining....