I wouldn't use one if your computer is that powerful. The only thing they do is take the strain off of your processor for decoding DVD movies, and when you're watching a movie, I'm pretty sure you won't NEED a whole lot of processing power in the background (besides that, it only takes like a 400-500MHz to smoothly run a DVD. Your system will have power to spare)
Besides not really helping you any, it can actually HURT your monitor's quality. When you run one of these cards, you go from your video card into it, then from it out to your monitor. That's one more conversion (analog-digital-analog) before it reaches your monitor, which can reduce your quality significantly. It would be best to get a DVD-ROM that doesn't come with one of those cards. I say the whole drive because in my experience, the drives that come with those cards require that they be isntalled so you can use their included software.
Find a drive that comes with a copy of PowerDVD or WinDVD and doesn't have a card. You'll be happier.
