If you have an extra few hundred dollars that you could spare for another monitor, I'd suggest you go for it. What's going to happen is that your existing monitor will burn up due to running at higher temps due to running at higher frequencies due, again, to running a higher resolution than what your monitor is programmed to run on. A standard definition monitor is set, OEM, to run at 72Hz for a 800x600 display. An HD monitor will require 136Hz. If you run a high resolution video, 136Hz, through a standard resolution monitor, it'll fry the innards faster than a homeless man taking a dollar out of your hands and running down the street to buy a half pint of JD, drinking it and getting back out to the street to beg for his next dollar. What you can do, if you are up to it, is to open the monitor and locate the discombobulator bubulator and on that, you'll find a switch that says, "FLIP THIS SWITCH TO WATCH ALL YOUR FAVORITE MOVIES AND VIDEOS IN A REALLY COOL HIGHER DEFINITION THAN WHAT YOU ARE USED TO TO GET MOVIE AND VIDEO SATISFACTION." That will allow HD versions of Hawaii Five-O and Golden Girls to come through without burning your CRT. Some Dawson's Creek episodes will play ok, but that is strictly trial and error. Hope this helps. Later, QD.