I am complete lost and searching for clues at this point.

I have a motherboard that will not detect 3 different cards, but it will detect all other cards, and these 3 cards work in other motherboards...

A specific r9 380x. 39 390. and rx 580... When these 3 cards are inserted into the motherboard at all, it simply will not post.... Motherboard works fine with others rx 580s and rx 480s, and these cards work fine in other motherboards...

Does anyone have any idea?