Hi,
I have just swap my gigabyte ATI 5870 for a gigabyte Nvidia 660ti.
Since I swapped the new video card, the onboard lan disappears in device manager, when I check in bios, shows as enabled ok.I changed cable in case it was a cable detection issue, but no change.
I have updated the bios to v9 but issue still occurs. If i remove nvidia and put my old video card in onboard lan works fine again, so I'm assuming it has something do to with the new card causing a conflict.
Any ideas?