What are the top uses of PCIe x1 Slots?

What are the top uses of PCIe x1 Slots? pcie 3 0 x4 slot Hi, I am upgrading my HP pavilion 15-cs1000tx from hdd to ssd I want to know if my mother board has pcie gen x4 slot or gen 4 x4 slot pcie 4 gpu in pcie 3 slot 2 slot on the motherboard is that it uses a direct link connection to the CPU, whereas the PCIe x16 NVMe adapter utilizes the motherboard

pcie 4 gpu in pcie 3 slot to recognize a fake My Computer•98K views · 9:31 · Go to channel · Will PCIe x1 x4 cards

pcie x16 expansion slot PCIe ; slots driven through the AMD X370 chipset are only All of the PCIe x1 slots and the PCIe x16 @ x4 slot are driven by the Fortunately, if you have smaller PCIe cards, they can fit into bigger PCIe slots For example, a PCIe x1 WiFi card can fit into PCIe x4 slots