Please don't spend much money on a system with 1.7Ghz P4, 512MB RAM, and Ti200. Don't waste money on buying ancient AGP card for any more than $20~$30 max. I would try to use a different, more efficient video playback program (have you tried VLC?). If still want to try to upgrade, search craigslist, ebay, or amazon for cheap alternative card. Other than that, you are better off buying a used PC for about $100~$150.