I went and bought an Asus PCE-N53 PCI-E card for my Optiplex 9020. I put it in the the 1 of the 3 PCI slots which matched the connector on the ASUS card.
I tried installing the drivers and such from the CD that came with the card. After I installed the drivers I could NOT ENABLE it and the Device Manager showed the driver as incorrect.
I downloaded the drivers from ASUS and installed them. Windows liked that driver and said it was ok, BUT I could ENABLE it.
Any ideas before I return the card?