The SSD does not appear inside the BIOSCMOS

nvme m 2 ssd slot   Dan nvme gen 4 in gen 3 slot

2 slot, you may be able to use an drive by using an adapter card that fits into a PCIe slot So, before you run out and buy an SSD, you'

2 drive into the M2_4 slot? Btw, the M2_2 and M2_3 slots share bandwidth with your main PCIe x16 slot , lowering it to x8 The Travelmate P2 TMP214-53 has an interface for a type PCIe Gen3 x2 and is fitted with a 512 GB SSD type card, so YES

betberry 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, Okay, that board supports NVMe drives in all three slots If I were you, I'd diagnose further by trying the 3rd slot, or swapping into