What is the difference between PCIe Gen 3 and PCIe Gen 4?

External PCI Express x1, x4, x8, x16 IO Products external pcie slot One slot utilizes a PCIe x4 interface for blazing-fast storage external displays, a DisplayPort port for another display external pcie slot Now compatible with Mac and Windows laptops, featuring 3-slot PCI-Express Laptops require a Thunderbolt 3 or Thunderbolt 4 port with external graphics

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