I got a P3 600 PC with a regular video card that has no hardware acceleration, and I got an athlon 800 with a rage fury pro card. My p3 uses software playback while the athlon uses the graphics card. I don't notice any difference in visual quality in PowerDVD. I even enabled hardware acceleration for the athlon. Are the video cards with dvd playback accelleration advertising lies? The video quality looks the same!