Radeon HD 6800 Graphics Issue

[jens]

Could be a conflict with a setting in the control panel for the graphics card, you can try and fiddle a bit with them. Possibly linked to vsync, catalyst a.i, anti-aliasing or optimizations. As much as possible make sure it has Use application settings ticked. It could also be that you have put some graphics setting on really high, like SSAO on high and with 32x samples, which is very demanding and does not really improve the looks much compared to medium and 8x sampels.