10GbE NIC in PCIe x1 , Will this cause problem?

Therefore, users can insert a card using PCIe x1 interface into a PCIe x4, x8 or x16 slots when the PCIe x1 slot has been occupied, which solves the problem of

PCIe x1 slots are often used for less demanding expansion cards, such as PCIe x16: This is the largest PCIe slot with 16 data lanes PCIe x16 slots

pcie expansion slot I see various mobos with, for example, 'half-length' PCIe x16 slots But this is a contradiction in terms A PCIe x16 slot by definition is

pcie 20 x1 slot Is the card installed in the top pci-e x16 slot? Do you have any other hardware plugged into other pci-e slots in the motherboard?