PCI Express

M vs : What's the Difference? can i use m 2 sata in nvme slot Two types of M2 SSD can i put ddr3 in ddr4 slot No If, for example, your laptop only supports SATA drives then you won't be able to use a PCIe NVMe drive in that slot

candy bar slot machine I want to install a Samsung 950 Pro NVMe 512gb SSD I can insert the SDD into the PCIe slot, however there is nothing to hold it in place