i get horrible dvd playback on my system:900mhz w/ geforce ddr on detonator3 and 256mb of ram, and i know i shouldn't be cuz my older 500 mhz could play movies just fine. I get a lot of random slowdowns, as if the drive was reading ahead, and the movie just pauses for a few seconds. Then while fastforwarding, the picture doesn't update, but the movie is indeed fastforwarding. Slowdowns also happen if a quick movement happens onscreen. I use compaq dvd player (which now gives me protection errors), Intervideo WinDVD and Leadtek Winfast DVD. Any suggestions wouldl be appreciated.