What does x4 bandwidth mean on a PCIe x16 slot?

If that's the case I would install it in the second PCIe x16 slot PCIe links are also full duplex so a PCIe 4x will be fine with a

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

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