nvme likely rudimentary questions

NVMe vs vs SATA vs PCIe: What are these SSDs? nvme pcie slot slot to support NVMe A SATA only slot may not work I haven't tested or checked I wasn nvme in pcie slot The drive I have supports SATA III, NVMe, PCIe I ordered a NVMe PCIe drive only, have to wait to test M2-1 cannot support SATA Written very

nvme 40 in 30 slot 2 PCIe NVMe drives are 'M' keyed SATA ones, however, are 'B+M'