Well on the nForce 430 system, I can set to either Negotiate 1000FD , Auto Negotiate, or Force upto 100FD. On the nForce 680 system, I can also force upto 100FD or Auto Negotiate, there is no option to Negotiate 1000FD. The nForce 680 system has 2 gigabit nics. I have enabled and tested with...