I have a 1920x1200 monitor hooked up to my MacBook Pro, and when I try to watch 1080p video (either in QuickTime or VLC), it is covered up by unwatchable flicker and a very slow framerate. Also, the monitor flickers when I mouse through the options in a drop-down menu on my MacBook Pro's screen. And before that, it would flicker just sitting there, but I swapped out the DVI cable for another one and now it only flickers when I do things. Any ideas? My other monitor of the exact same model works perfectly fine (haven't tried 1080p on it) for all uses. I would like to eventually use both of them, so is there anything I can do? Everything on my MacBook Pro is slow to animate, as well (Stacks and Dashboard openings lag while creating major flicker).