The LAN chipset isn't an issue. You probably don't care about audio, but it may work. You'll have to find out from AMD or Biostar if AMD A55 (Hudson D2) chipset drivers are available for that OS.
Have you read the reviews and more specifically the one that includes this comment? "Cons: Chipset Driver Nightmare for Windows Server 2008 R2
AMD does not list this motherboards chipset architecture on their website directly for driver download! You can only find the 6, 7 and 8 series only!"