PCIe vs NVMe: What's the difference?

PCIe vs PCIe NVMe SSDs: What's the difference? m 2 slot with pcie x4 lanes The ASUS gen3 card that @cowphrase links has the four slots stacked from the slot and up, translating to fairly long wires for the topmost m2 pcie 40 in 30 slot Most of those cards are x16 and their switches split to x4x4x4x4 But there are x8 cards with 4 sockets which then split to x2x2x2x2 Check

m2 slot types 2 drives as any other PCI-e lane They will split it based on what slots are populated I know for something like Ryzen it has a dedicated x4