What are the top uses of PCIe x1 Slots?

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A PCIe graphics card can be used in a PCIe slot, but it will operate at PCIe speeds · A PCIe graphics card is backward compatible with PCIe

candy tower slot 2 to physical 16x pcie slot adapter and I'm assuming hardware will show up in due time I would like to use a future Laptops that

can i use gen 4 nvme in gen 3 slot Yes, PCIe standards are thankfully backwards compatible, meaning that a PCIe device will work in a PCIe slot, but it will only be able to reach PCIe