I think you are limited to these:Thank you. Do you mean I can't just use any random NVME m.2 drive, like another SK Hynix P31 Gold NVMe? 950 Pro is pretty dated in terms of operation speeds. Is there a list of compatible NVMe drives for this motherboard somewhere?
PCIe NVMe (with built-in OPROM):
Samsung 950 Pro - Bootable
Intel 750 Series- Bootable
These drives have an option rom to allow detection @ boot and when windows loads it will then use the NMVe driver. Newer drives did away with the oprom support.
Others will still work but would not be bootable.