I've had so much bad luck with the 6000 series that my next cards will be from Nvidia.
To name a few of the problems, I used to own three 6970s
Card number 1 died twice and needed to be RMA'd both times
Card 2 started artifacting within months of buying it and needed to be RMA'd
Card number 3 ran really really hot for some reason. (compared to the other two, it would always idle 10 degrees higher and be quite a bit louder)
I sold all three and bought a 6990 ( At the time...