Guys how to run 19 cards (P106) on Asus B250 mining expert?

13 cards work fine.
on 19 cards command nvidia-smi do nothing(
I believe this board can support max 13 of the same GPU's. Asus was promising to release new BIOS update to correct the issue. No idea if they released update or not.
I don't have this board, if someone who has this board and managed to run more than 13 GPU's, please post the workaround