TL;DR- Can I buy this http://www.ebay.com/itm/New-AMD-Radeon-HD-7970-3GB-Video-Card-for-Apple-Mac-Pro/140952407495 plug it into a MacPro5,1 (2010 12-core), and it'll Just Work? There are doubtless 101 threads on this very topic so I apologize for the info request, but skimming through them I haven't found too much clarity. I've got a 2010 12-core Mac Pro. The Radeon 5870 it came with is slowly dying, or not... which is the tricky part. There's nothing wrong with it, but the fan has been getting steadily louder and louder to the point where it's really annoying me and I'm thinking of doing something simple like pulling it out, tossing it in the trash, and slotting in another card. The card has no functional problems, the fan is just getting ****--g loud and annoying. It's still under warranty. But... I am not dragging the entire Mac Pro to an Apple store so some "genius" can look at it, conclude there's nothing wrong, and then dragging it back home. To repeat, the card word fine, the fan is becoming super-loud and annoying. I'd like to just replace it. Now then ... with what? I really, really, really am not buying another Radeon 5870 from Apple, and giving them $500 for a card that's 4 year old tech. I'd like to buy a 7970. Will it Just Work? I'm reading this thread, http://forums.macrumors.com/showthread.php?t=1505726&highlight=radeon+7970 which goes on, and on, and on, and on ... with point, counter-point, ranting, and overall lack of clarity. Will a Radeon 7970 work in a 2010 Mac Pro? If so, could someone please give me a link -- either here or through PM -- as to what version/model, and where I could buy it? Thanks for your time, and my apologies if this particular question has been answered elsewhere, all I find is the very long thread I linked above, which is a large collection of people ranting without any particular consensus that I can see by just skimming it.