THX kev. But most labs I work with have CC and are on macs (for when I go above 1080, or have more than 3 sources). I know it isn't necessary on the windows machines I've used, as the software actually looks for a card, checks for a specified value. I was just adding the info for those, like me, who have a small shop where they work with small projects, all using the older software versions. I max it out by using old hardware, but as fast as I can make it (I have a little fun playing computer frankenstein okay?), and it works pretty well for some pro-bono type work. Is it perfectly professional? No. But for Pro-bono (not getting paid) it does what I need, and works every time. I've put CUDA into the mix only recently. This works great for editing. I don't mind using my few $50-100 pc's that I put 100-150 into for upgrades to work on effects and render. It's sometimes faster than other projects at the same res at labs using macs and CC (CUDA MISSING). I also like to old-school it and have fun. Doesn't mean I don't appreciate the new CC. Beautiful work... ...really. I just wish apple would drop the "We know better" \ "Almighty big brother" (and completely incompetent) attitude they've taken. They use a lot of GNOME elements and other linux programming as it is. It's almost painful to see what they've become. If Steve were still around, he'd allow you to replace your apple supplied driver with a better one, if available, and would even hire people to test it, then would supply it as a downloadable update for those who wanted or needed it. I've seen linux geeks get CUDA 3.2 working with some cards by completely removing the APPLE supplied driver, then putting in the linx version of the driver for their card and rebooting. Same folder, different files. When they updated, apple replaced that folder in the update... It's like their slapping their users in the tenderparts with a spiked club and saying "THere, doesn't it work better now?". Not advising you try it, but for purely testing purposes... ...you might give it a shot. IF it works, CUDA might be available for mac users with a few caveauts...