Gentlemen, what do you say? Is it possible to run 19 Nvidia gtx1070 on Linux? Or have to do the settings?
Visit this site and try to read the whole explanation about what it is
https://www.asus.com/id/Motherboards/B250-MINING-EXPERT/It's PCie slots and you must try to get more information about what PCie through the internet and that will increase your knowledge about that dude.
the answer is no. its a bios limitation that prevents the board from working with more than 13 normal GPUs.
you can only get 19 GPUs working if you use mining gpus like the P106-100 cards