I just moved up from a 15 Samsung to a 17" dell lcd(second screen, next to my 23 apple display), because it was free. I have noticed about every 15-25 minutes the screens fade for a about a second almost like it is refreshing or something. Has anyone encountered this problem when running two screens? I didn't have the problem when the 15" was hooked up, but then again the 15" was running at 1024x768 and the 17 runs at 1280x1024. Could this be the video card just huffing a puffing a bit? G5, 2.5, 128ati 9600 xt, 2.5 gig ram. Also this is not a dvi lcd, I had to use a convertor. In my preferences it shows up as a CRT. Is this right? C.