So I have had the card for about 24 hours. So far my experience is really good. I am running 10.8.2 with the latest drivers from nvidia. In ML the card runs flawlessly. Using Photoshop, illustrator, Final cut, and aperture the card doesn't even break a sweat. The 5770 even at idle was warm. The 670 is cool as can be even being pushed. I ran some test in win 8 and BF 3 plays ultra at 1440p on my Apple 27". Solidworks runs amazingly. Fan does ramp up when playing BF but it's not a big deal. Gota cool the beast. One complaint though, When I turn off the computer and turn it on, not restart the expansion slot fan runs around 1500 to 2000 rpm and so does the power supply fan. I found by stressing the video card like playing steam or something the fans return to normal operation. Waking from sleep the fans are ok and restarting from win to osx is ok. Here are some pictures of the card.