What does the X4 mean in an PCIe Gen X4 NVME drive?

What does the X4 mean in an PCIe Gen X4 NVME drive? m 2 ssd slot nvme pcie gen3 2 1TB 51 2TB 17 4TB 4 VIEW LESS Form Factor Form Factor NVMe 114 SATA 96 PCIeNVMe Generation PCIeNVMe Generation Gen3 76 Gen4 m2 sata vs nvme slot Solved: Hi blessed day! Does my laptop nvme slot is gen 4 nvme ssd sir?

m2 sata vs nvme slot The ADATA LEGEND 960 PCIe SSD supports the latest Intel and AMD platforms and also meets the NVMe standard The LEGEND 960 supports PCIe and

m2 slot Client PCIe NVMe SSDs typically only use the 2280 form factor because its slim design allows it to easily fit into desktop and notebook PCs Enterprise- On ZBOX Mini PCs equipped with an NVMePCIe SSD slot, current ZBOX BIOS' lists the NVMePCIe SSD separate from the standard SATA storage devices