I bought my Dell Desktop around this time in 2006. The Chipset is Intel Grandstale. The reason i ask is because i want to buy a 8800GT, and thats not happenin unless i have PCI-Express. I would think that i would have PCI-E because it was introduced in 04, but i'm not sure. help would be appreciated.
You could take the side of you case off and have a look at this image: http://www.viaarena.com/images/articles/pcie 002.jpg