Chevis 0 Newbie Poster

Hello, I have been having some trouble deciding if I should update my card. I currently I have a NVIDIA GeForce 6800. I had it installed in my Dell Dimension 9100 when I bought it. I had some people say I should try to update to the 8 series cards, but they said it may not work. They said I should check my PCI first. The PCI is where I start to have trouble. Can anyone tell me what kind of PCI I have and if it will run the 8 series cards?

[Dell Dimension 9100]
Pent 4 3.00GHz
2.99GHz, 2.5GB RAM

Thanks so much.

-Chevis