New NVMe ssd in slot issues

I want the crucial P3 drive to be detected in UEFI and work when plugged into the second slot This is so that I can

The Samsung 960 Pro NVMe SSD in an slot To get the most out of slot “gumstick” drives into a PCIe lane PCIe drives

m2 vs nvme slot The Samsung 960 Pro NVMe SSD in an slot To get the most out of slot “gumstick” drives into a PCIe lane PCIe drives

m24 slot wallet 2 slot relies on PCIe and a more advanced interface If it's used on the PCIe motherboard interface, the Ultra M2 SSD can even support