1) My secondary monitor parrallel to my imac, has flickering vertical and horizontal white lights flashing on the screen. What could be the issue? Could it be the mini to dvi adapter (3rd party) or something else. Could it be the dvi connection isn't placed well enough. The cables are too squished I dunno. Could it be the display? 2) When I'm trying to play Swtor MMO on one display, my other display with skype or a browser goes sluggish when I move the windows around. What can I do to fix this? Is 4 gigs enough ram, or should I upgrade to 12.