I have the same video card, and I have noticed something similar when playing back videos (mplayer, vlc, youtube), and the video's also go smooth for as long as I keep a key pressed (such as the shift key).
I have the same video card, and I have noticed something similar when playing back videos (mplayer, vlc, youtube), and the video's also go smooth for as long as I keep a key pressed (such as the shift key).