Maximum Transfer Rate from USB to Ethernet

I'm using the trial version of the server and I've been testing it against a Raspberry Pi 3B, a NanoPi Neo, connected to a standalone client running Windows 10. I'm wondering what is the maximum possible transfer rate from the USB to ethernet.

#2

A USB 3.0 port and gigabit ethernet with a decent arm processor should get about 40Megabytes a second.