I have a system built around a Asus M2N4-SLI motherboard. It has an NVidia Nforce 4 chipset. The LAN port is Gigabit, I have XP installed with all the drivers for the motherboard.
The LAN port is plugged into a Netgear Gigabit switch. Other Gigabit devices show a green connection (meaning Gigabit). The machine shows 100Mbps at both ends (the LED on the port shows as amber and on the switch as amber). Windows reports the connection is 100Mbs.
I have tried various LAN cables.
There is nothing in the BIOS to turn on Gigabit.
Anyone have any ideas why it is not working as a Gigabit port?