1600*1200 resolution is not supported by any 15" monitor to my knowledge. A few high end 17" monitor may support it in interlaced mode (eg. - one out of three 17" monitors I own). Almost all 19" and higher monitors fully support 1600*1200 and higher in non-interlaced mode. BTW, dont ever go in for interlaced mode at any resolution. It is very straining to the eyes. Go for non-interlaced mode at 75Hz vertical refresh minimum at the required resolution. These will cost slightly higher but fully worth the extra bucks spent.