Why so slow??? Athlon1.2G + 256DDR + Voodoo3 2000 AGP

[piginspring]

i'm just wondering why my computer plays dvd movie so slow? it's even much more jumpy than my roomate's athlon750 plus a normal video card. anyone help me out???

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Toshiba 16X DVD drive
Athlon 1.2G
Epox 8K7A
Crucial 256M DDR
Voodoo3 2000 AGP
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[bryan2010]

DMA enabled on the DVD drive?
Bryan