Ironically I had the same issue today as I bought a new monitor (lg2452t) and the display setting also wouldn't go up to 1920X1200, LOL. But I found that you could change it by going to the NVidia control panel instead of the xp panel. Sorry can't help with the PS3. BTW, DVI isn't a 'component cable' in the strictest sense of the word, but I'm beyond my realm talking about the PS3 setup.