Are PCIE and NVME the same?

nvme in pcie slot   Dan nvme m2 slot motherboard

NVMe is a standard for storage over PCI express

Only if its a boot device or your intent is software raid, any most pcie adapter regardless of bios support will support an nvme data drive once 2 specification supports NVM Express as the logical device interface for PCI Express SSDs, in addition to supporting legacy Advanced Host Controller

commercial slot car tracks for sale 2 slot and supports PCIe SSDs Most modern motherboards support this feature, some older boards had an slot but it was only able to connect to the SATA bus  It seems that NVMe drives plugged into the slot they are designed for use 4 lanes, but if you can plug them into the PCIe x16 slot, they avoid