I reformated my XPS-2 this afternoon. Installed all of the drivers (most of them were out of date, and I had to download the latest on Dell's website).
For some reason, my install of the latest Nvidia drivers didn't go so well. As 3dMark netted me a score of 1233.
I removed them, used a driver cleaner someone posted and installed 76.50. My new score is 5203.
I haven't played Battlefield 2 yet, so hopefully I'll be able to get the official drivers up and running.