What are the top uses of PCIe x1 Slots?

How to Enable a PCI Express Card Slot - Small Business - pcie x1 slot function Providing total bandwidth up to 250MBps from the PCIe x1 host controller card allows the computer to function as though the expansion chassis cards were pcie slot for gpu PCIe slots allow your motherboard to connect with your PC's most critical components and provide key functionality

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