I haven't ran 3DMark03 on any of my recent systems, but I got 30972 with an 8800GTS 640MB (G80), Core 2 Duo @ 3.1GHz, and 2GB of RAM. I'd say that your score is a little low, but I don't think 3DMark03 took advantage of quad cores so if yours is stock, then the extra 700MHz of my C2D is probably the reason the scores are so close.