PCIe adapter with four slots - Storage

I tested PCIe x4 10Gbe NIC in a PCIe x1 slot, and here's my thoughts and results

1 x PCIe x16 slot Intel® Z790 Chipset 3 x PCIe x16 slots 1 x PCIe x1 slot so there is not a 2nd pcie slot at x8 Originally

pciex1 slot For example, if you connect a PCIe expansion card to a PCIe slot, the card will perform to the PCIe specs PCIe Gen 4 offers

pciex1_1 slot 2 slot, the PCIe x4 slot, or both are used, they get access to x4 lines Additionally, the x16 slot is reduced to x8 when used in this way PCIe