I am looking to upgrade my 2008 Mac Pro to a graphics card that is able to support Mini Display Port. I am wondering if i can get a 2009 or 2010 graphics card from one of those years model Mac pro. If i do get a new mac pro's graphics card will it work just fine? I am unsure why it would not but apple is saying it may not and i am curious what any issues might be. Would it be the drivers?, the logic board?