No matter if I'm working, browsing, watching a video or playing a game - from time to time, for no apparent reason, everything starts stuttering. But when I open the Video Options tab in CCC, the stuttering goes away and everything goes back to normal. :3eyes: Catalyst 11.6, default 3D settings, everything turned off in Video Options tab, no overclock (and never was). GPU temperature: 45-50 C. Same for all CPU cores. No spikes in CPU usage in Task Manager during the stutter. ...Can't think of anything else of note, at the moment. Any ideas?