z370 + 8700k + + PCIe question about PCIe lanes sharing

z370 + 8700k + + PCIe question about PCIe lanes sharing m 2 slot with pcie x4 lanes Nvme slot of M-type but i don't know does it support express lane or , because for upgrading to Nvme ssd it should be m2 slot pc I bought the adata drive knowing that both slots support pcie x4 This is really frustrating since I expected at least 2900 read speed 0

m2 slot pc Computer bus interfaces provided through the connector are PCI Express x4 , Serial ATA , and USB (a single logical port for each of

m2 pcie slot You need to configure the slot that the xpander card is installed in to “x4+x4+x4+x4” as opposed to x8 or x16 The motherboard BIOS mayalso If you're looking to add a PCI ExpressNVMe drive to a desktop with an older motherboard that lacks slots, one option is an drive on a carrier card