christmas 2007 I upgraded from Ati HD2900 to a Geforce 8800gtx.
I have always run 3840x 1024 60 hz resolution, never got any problems.
SUddenly without any reason (nothing was newly installed or configured) the 3840 resolution (under 2D 3D) became undisplayable.
THe 3 screens are flimmering with <30 hz and the top third is light blue and the bottom two thirds are darker blue(like the win XP bottom task).
there are no symbols, just the two different blue areas.
3072x768 75hz and 2400x600 are working properly
This just suddenly happened to me and I didn't change anything. I also have a GeForce 8800GTX. I rebooted my computer and I got the weird flickering, a little different between the top third and the bottom two thirds. just like he describes.
So what was the fix? Reinstalling windows? Since the other modes still work, can I be reasonably sure the unit is OK and just sell it on ebay?