The difference between PCIE NVME &

Which slot should I use for my SSD? m 2 pcie slot The ToughArmor MB840M2P-B turns a PCIe 4x, 8x, or 16x expansion slot into a removable NVMe drive bay, allowing you to swap in NVMe SSDs without m2 sata vs nvme slot I've had some troubles finding what exactly fits into this thing From the white sheets it looks like it will take a 42mm or 60mm pcie ssd

m2 pcie 40 in 30 slot So I've ran out of slots for m2 ssds, and I have an open PCIe x16 slot and 2 PCIe x1 slots and I was wondering which adapter could