PCIe Gen2 Bandwidth | AGX Xavier

We are planning to connect PCIe 2.0 based USB card (x1) to the AGX Xavier’s PCIe port. We could note that the maximum bandwidth supported for PCIe up to Gen3 is 5Gbps as per the OEM DG.

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Could you please let us know if AGX Xavier can support PCIe Gen 2 speeds up to 5Gbps when operating with PCIe 2.0 cards?

According to Wikipedia, PCIe 3.0 could support speeds up to 8GT/s (8Gbps) which is higher than AGX Xavier’s specification. Is there an internal limitation in AGX Xavier or am I missing something here?

Please help us with this query.

Thanks