EM120K-GL USB 2 or Superspeed

As described in hardware design guide, this modem can be connected will multiple ranges of USB speed:12Mbps, 480Mbps, and 5Gbps. Without connecting to the USB super speed line to achieve 5Gbps, will this modem work at 600Mbps capability if only USB2.0 lines that are connected (480Mbps link)?

Seems that you already know it.
It couldn’t reach 600Mbps with USB 2.0.

Thank you. I was not sure if that’s the case. What does the limit if were to linked only to 480Mbps? I am trying to write a specification on my product.

The EM120K-GL support USB 3.0 and PCIe.
To achive much more speed, it is btter to try with USB 3.0 or PCIe.