Nvidia 570 ultra chipset's gigabit LAN interface

Is there known problem with the LAN driver of Nvidia 570Ultra chipset?

Most of the time, the card is working in 100M full-duplex rather than
1000M full-duplex, as reported by the LED on 3com OfficeConnect 5-port
gigabit switch.

Also, I can't find 1000FD speed setting in the driver of the gigabit
interface.

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