_1 Slot not recognicing my SSD NVME

Biostar ; 1, 1 x AMD Socket AM4 CPU ; 2, 4 x DIMM DDR4-4933+ ; 3, 4 x SATA III Connectors ; 4, 1 x PCIe x4 Slots ; 5, 1 x PCIe x4 Slots

The z390 Aorus Master comes with three slots, one M2M, one M2A, and one M2P, if i buy two Samsung Evo 970 NVME SSD cards,

m2 nvme slot 2 drives are “keyed” at one end so as to prevent the end-user from inserting them in an incompatible socket PCIe NVMe drives are 'M' keyed SATA ones,

m2_1 slot Yes 8x = 16x Its not stated in motherboard manuals because it isn't a motherboard limitation, the limitation is on the CPU You need to