PCIe error on Slot 12 is not being reported

pcie training error internal storage slot pcie training error slot 1 1 ) firstly send the boot priority in the bios to HDD 0 or the harddrive connected directly to the board with the os 2 ) second thing, the pcie 4 card in pcie 3 slot why are we limiting to m2 slot instead of pcie slot? and that gave me a wild idea: an m2 extension cable that hooks into a new square form

pcie 40 in 30 slot Slot: Card present I have 2 Nvidia 980 GTX cards in SLI mode PCI Express Root Port 1 Card not seated properly perhaps? Thank you