Got my 670 today. Everything seems to be running great and both my Apple LED screens work. One question and I want to see if other have run into it. The expansion fan seems to be running around 1300-1800 rpm and fluctuates. Also the power supply fan is ramping up to around 1200. Im running 10.8.2 and didnt install any drivers.
Sorry to post so many. Still working in final cut. the card has been on for about an hour and a half and now the all fans are back to normal. I will update after a reboot or wake from sleep.