Hello all. I have a 2008 MacPro and currently run two identical ATI Raedon 2600's. I would like to upgrade one of the cards to the new EVGA 285 in a few month. I have heard that Windows Vista dose not accept two or more cards that are from a different maker. I am wondering if this is true? I hope it's not. The reason for the upgrade if you are wondering is because, I need a more powerful card to run Maya and Cinema 4d and a few other programs. I don't want to get two because of the cost of course. Thanks! I run Vista Business 64bit SP2 and of course... OSX 10.5.7!