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Can PCIe Gen3 root complex support Gen4 PCIe Bridge switch device.

Question asked by Rahul Gupta on Feb 25, 2019

Scenario: Gen4 Bridge switch connected to Host system (gen3 root complex).


When I am checking the generation of the connected PCIe bridge[configured @Gen4], I am getting unknown speed/generation.


My understanding is that the root complex should be higher or equal [in generation] to PCIe switch bridge device to support all the speed/generation .


Please correct me if wrong.



Rahul Gupta