That's actually a good question Akaz1976. I'm not sure if you would need a decoder card or not. With a P3 700 and the GTS, that is more than powerful enough to do DVD decoding in software. I would say not to worry about a decoder card, the DVD drive you buy will have everything included that you need. Put it this way, my P2 350 and ATI Rage Pro Turbo from back in the day handled DVDs great in software, with no decoder card.