Ok - so my rig stops applying fan % correctly once i get to more than 11 cards.
once i connect the 12th and/ or 13th card to the ASROCK pro btc board - it wont apply the fan % to all the card / regulate auto temp at all. and the computer becomes almost un-usable due to how slow the UI is.

any idea whats up?
running 8GB DDR4 ram
128gb SSD
Celeron G3930 processor