In reality it can't work with 2.5Gbit speed with most of the routers due to staggering internal error.
Even more serous error had been made in upcoming 10 core CPUs, where PCIe 4.0 controller had such amount of design errors that it had been switched to PCIe 3.0.
This also shows how closed testing made by cheapest Indian outsource firms can lead to horrible results.
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