I have one Sapphire Radeon HD 6950 2 GB DDR5 Graphics card in my computer.
Everything used to work great. One day my friend and I flipped the switch on it to enable overclocking and I overclocked for a little while. Everything was great. I only overclocked a little bit, nothing too crazy. The default is 800 Mhz, I think I bumped it to 850 Mhz tops.
A couple weeks later I purchased a 1080p monitor to go along side my 1650x1050. Everything was still going great.
A couple weeks after the monitor purchase, I notice that both of my monitors are flickering like crazy. Whenever I move the mouse, or scroll on a browser window for example. Horizontal lines are flickering all over the place. Almost looks like some of the image is displaced in a different location, but happens very fast.
I've realized that if I go into my resolution settings and change the resolution on the 1080p monitor from 1920 x 1080 down to 1650 x 1050 and then SET IT BACK UP to 1920 x 180, everything works great until I reboot the computer. I forget there is even a problem until that point.
I have now disabled the overclocking, and the flickering still occurs on startup.
Does anyone know what could be causing this? And why it is being "fixed" when I reset the resolution manually?
Update I just updated my motherboard BIOS, still flickers.