I have a Sapphire ATI HD 5850. my screen keeps flickering as seen in the video below. the screen itself is ok and tested on another pc.
Every couple of minutes, while in windows mostly, the image begins flickering. All drivers are up to date (I even tried the beta drivers, same results).
After an extensive research I tried to overclock the card's Idle clock speeds (as some people claimed are too low due to power savings mode), no help there, same result - flickering.
Physically speaking, the card is in good shape, clean, works fine and doesn't overheat.
The ONLY thing that made ANY difference strangly enough is changing to a lower screen resolution, but I dont really know what to make of this finding.
Help me guys!