Thanks for the responses, I'm assuming it has an agp slot since it's only about a year old. Thanks again
I wouldn't assume that. I'm pretty sure that some systems with integrated video still leave off the AGP slot to cut costs. I don't know for sure if Dell does, but I wouldn't be surprised. (I like Dell, but their slim/budget systems are not really designed to be upgraded easily.)
As noted, if there is no AGP slot, you could still get a PCI card but you are likely to be stuck with a less than stellar Geforce 5*00 series at best.