well, yeh I'm new to this forum thing... thanks for the info, pretty much confirmed that the 5870 should/could work fine.
My question now is: Is there a difference between a 3,1 model and a 2,1 model. I got this machine in July '08-could be an '07 model?
I 'm overhauling & upgrading this machine. Doing a clean install with Snow Lepard, as soon as apple mails the disk. Adding a little bit of Ram, this graphics card, etc.. We do a lot of HD Final Cut and it's been running pretty good since I got it but my other graphics card seemed to be causing some problems. Running hard for three years, seemed to be starting to hang things up a bit. So anyway making a clean install and upgrade.
Thanks for the info, it's very helpful. It's amazing how much info is on this forum, very cool! I'll spend more time reading before asking a redundant question...