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Thread Starter 
Just got two MSI 6950 TFIIs from NewEgg Open box. Both cards artifact on start up (green boxes then hard reboot). I tried putting in my good 5870, uninstalling the drivers, then putting the MSI 6950 back in and re-installing catalyst. I have only tested the cards separately, I didn't even get to put them in crossfire yet...

Is there anything else you guys can think of that may be causing this other than defective cards? Would my overclock have anything to do with it? I tried booting with my stock 2.66ghz settings and I still got the artifacting.

Do I need to do a driver cleaner or does simply uninstalling catalyst through ATI's tool work fine?

Thanks for the help