Hey everyone, So I found a list of Mac Pro 1,1-compatible cards on this post: http://forums.macrumors.com/showthread.php?t=1712192 And I think the GTX 660 would be a nice choice - Would this be the card to buy? I looked on eBay but am not sure which is the correct one. Are there versions that just won't work in a 2006 Mac Pro? I do understand that I need a cable for this thing. I am looking to run Mountain Lion (maybe Yosemite) on this thing, and possibly some games on my Windows partition (GTA IV, Rigs of Rods, etc.) I currently have a 2600XT, which was taken from a 2008 Mac Pro. I DID have a budget of $100 or under, but I found out that these things sell for a lot on eBay, so I don't mind spending more than $100 - as long as the card is good for the money. For example, the GT 5770 looks pricey for what it is... All in all, would you all recommend this card? Can someone possibly give me an eBay link to the correct card to buy? Thanks! And if anyone from the PowerPC side is seeing this: I said that I was taking a break from MacRumors and such, but I am just here to figure out this Mac Pro situation. I have to get this machine running Mountain Lion or later; either for my sake or for the person I may give this machine to.