I have a new GA-990XA-UD3 Rev 1.1 and an older GA890XA-UD3 Rev 1.0 and on both of the MBs when I switch from Win 7 to Linux or from Linux to Win 7 the ethernet adapter seems to "latch up". The solution is to remove power from the computer completely when switching operating systems. Surely there is a better fix than that! There was no problem at all on an older GA-M55SLI-S4 motherboard. The GA-M55SLI-S4 MB is now defunct, which is the reason for the new GA-990XA-UD3.
Jerry