NVMe vs : What's the difference?

PCIe vs : Is PCIe Worth the Upgrade? m 2 slot vs pcie is a slot that can interface with SATA , PCI Express m2 slot pc 2 SATA True dual PCIe cards have x8 connector, for example AOC-SLG3-2M2 To fully use it, you need an option in bios to split x8 link into

m2 slot mainboard 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,