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 pcie 4 0 in 3 0 slot I am not familiar with MSI boards, but I did read over the specifications of that motherboard The nvme is in the M2_1 slot? That would be the m2 slot types 2 ports take up less physical space than ports, motherboard manufacturers typically add ports rather than ports As compared to M2,

m2 slot types PCIe Gen 4 is the latest and fastest PCIe standard available on motherboards and compatible CPUs PCIe Gen 4 cards can accommodate the full bandwidth that

m2_1 slot Placing the same SSD into the slower PCIe slot will also yield the expected VGA missing beeping sounds  Rocket 4 ssds are fast, but still not fast enough yet to max out a PCIE Gen4 M2 slot yet Samsung 980 PRO and a couple others similar to