I own a Mac Pro (2008 3,1) and the ATI 2600 Graphics card it shipped with has finally broke. Been looking arounds forums and found the GTX 650TI will work ok so I've just ordered one off ebay. However I've just now noticed that no PC cards will work on snow leopard and snow leopard is what I'm using Any ideas how i will get this card working ? , nobody i know has a Mac Pro so borrowing a card is out of the question. and one more Question will i require a 6pin lead for the GTX 650 ?