Displays going crazy!
So, I am running 2 LED Cinema Displays on a Mac Pro Eight-Core with NVIDIA GeForce GT 120 cards. Recently my displays have started going crazy every so often. It's looks kind of like they have frozen but if I open a menu, play a video, drag a window etc. it kind of creates echoes of whatever froze on the screen. I have to restart the comp to be able to use it. Not sure if that makes sense. Anyway, it's a pretty intermittent problem. It's been doing it for about the past 2 months - it did it about 3 times, but it's just done it 3 times within 2 days. Not sure what the problem might be.
Any ideas?
Mac Pro, Mac OS X (10.6.7), Eight-Core - 16GB RAM - 2 Displays