NVMe x4 adapter card for PCIe x1 slot

1) First is simply looking at the motherboard, many times printed on the PCB near the PCIE slot is the actual X4 or X16 or whatever it happens

x, that is 250MBs per lane So for that card 8x slot will provide about 16Gbits, that is enough for one 10GigE port, but from my real

x4d slot Pcie x16 slot into multiple x4 slots · PCIE Bifurcation · IBM 69Y5321 M4 PCIe Gen-III Riser Card 2 · Cablem ATIC

coyote cash slot machine SLOT # 1 PCIe Gen2 x8