Explaining the Difference Between SSD NVMe and M2

Does it matter which slot I use? ardForum nvme and m 2 slot difference 2 standard contains variants with up to four PCIe lanes, one SATA 6 Gbs and or one USB port So it is possible to connect PCIe as well as SATA SSDs nvme slot vs m2 NVME is a SSD and there are SATA SSD they are not interchangeable, they also make SATA SSD's for use with a SATA port on a Mac or PC

nvme 40 in 30 slot pcie is about 4x faster The add in cards plugged into a X4-X16 pcie slot will have some sort of adapter