I upgraded my graphics card from a 2600pro to a force3d 4850.
The problem is that with every game I play there a lines that flicker around the screen and the screen flashes between showing the game and a black screen. This normally goes away after a few minutes. I have tried reinstalling the drivers using driver sweeper to clean out the old drivers and the card is not overclocked.
If I take a screenshot of the problem the screenshot displays the game just fine without the error. For some reason Rival Tuner et. al. still say I have a 2600pro with a R770 core but device manager shows 4800 series.