The power supply is 450watt. I use the graphics card strictly for the widescreen. No gaming. I wanted the 24" widescreen for the larger format as I use AutoCAD. I originally bought the card for the output to copy VHS tapes to DVD on the computer. I ended up buying a stand alone DVD recorder ($600) that I plug the VCR into to copy the tapes to DVD. I don't use that anymore either.
Based on the information I can find, my 4:3 monitor works at all resolution. The widescreen monitor only worked at the 4:3 resolutions. All widescreen resolutions caused horizontal flickering line and the monitor going black.