I have a 3.1 mac pro with a ATI 4870 1GB that I flashed 4 years ago. I read a lot of recent threads about how the new systems had drivers for the ATI and GTX cards. I don't need the log in screen so I gave the Gigabyte 7950 3GB a go. It seems to work ok, though I needed a 6 to 8 pin connector. I got a kernal panic after a few hours that required a restart and was a huge pain in the ass. Temps were in the 95f range..... My question is, how do I find a great card that will drive a modern display that won't cause these problems. I've read all the threads here....the irritating part others have reported no problem with the same card. I'm looking to ugrade this computer to last another 2 to 3 years and need some graphic horsepower. Any help will be appreciated.