Hi All, I've been playing a few games on my MacPro which was one of the reasons I went with the 2.2 1GB Graphics card. However, when I exit the games the Mac just goes to a black screen and I have to press the power button to turn it off.. This doesn't happen every time but say 2 out of 5 times I play Civ V or Trine. I'm guessing using the power button to turn the machine off is not a good idea but there's not much I can do.. Anybody else experiencing a few crashes playing games? Rob.