I had the same issues, Im on a 1gb network but was only transferring
files at 24mbit or 2mbytes/s speeds, if I forced the nic to be in 100mb
mode I could push 7mbytes/s, but I wanted my full speed. So after trying
many things it turned out to be only 1 setting. Flow Control. It was
disabled so I set it to rx & tx enabled and put my nic back to auto and
now im back to 1gb speeds again.
Hope this helps, it worked for me.
Windows Vista Ultimate 32bit latest nvidia drivers
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smc1979
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