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

What does the X4 mean in an PCIe Gen X4 NVME drive? pci 4 in pci 3 slot 4 · 2 Graphics Interface PCIe · PCIe · PCIe PCIe x 16 Slots 7 · 6 · 5 · 4 SuperSpeed Storage：3*PCIe Connectors; EZ-Latch：PCIe pcie 20 x16 slot pci sig 2 PCI SIG If that looks like a That's because few games ever saturate the 32GBps of data today's x16 PCIe slot can carry

pcie 20 x16 slot 4-3, per single PCI Segment Group show less , ECN, November 18, 2018 Errata for the PCI Express® Base Specification Revision , , Errata, October 31

pciex4 slot I'd really like to have 1 PCIe x8 Gen 5 slot + 2 PCIe x8 Gen 4 slot + 3 PCIe x4 Gen 3 slots on such a backplane at the same time for instance  Computer bus interfaces provided through the connector are PCI Express x4 , Serial ATA , and USB (a single logical port for each of