How fast is PCIe NVMe vs PCIe

What type of PCI-E does my slot have? m 2 pcie 4 0 in 3 0 slot A PCIe slot, for example, features an 8 GTs transfer rate per lane, whereas a PCIe slot possesses a 16 GTs transfer rate per lane 2 m2 slot screw I had an Asus HYPER X16 GEN 4 CARD for 4 Nvme but it's OK for only one slot I should change to x4x4x4x4 in my bios Another idea was to

m2 vs nvme slot 2 supports both SATA and PCIe, an module may only be inserted in either one of the two interfaces, so check your motherboard documentation