Thanks everyone for all the help and comments. I thought maybe it was a driver thing as well, but as you can see from the attached picture of device manager, they are both "3com" network cards, although not exactly the same model. I haven't updated the drivers to the latest from 3com, just using the M$ drivers. It does sound like a driver issue though. If I find anything, I'll be sure to post it here for the others that were curious.