low pcmark04 and 3dmark03 scores

[lazybum550]

I just built a new computer with an amd 64 3400+ cpu asus k8n-e deluxe, 2x corsair xms 512mb ddr, and a geforce 6600gt graphics card. I ran sysmark 04 and compared the score to the only other person with the same chip and same graphics card. I did a little better in every category except "Physics Calculation and 3D" and "Graphics Memory - 64 Lines". The other person scored 149.8 fps and 1008.48 fps respectively while my scores were significantly lower with 68.51 fps and 454.23 fps. I ran it twice and got pretty much the same results. The pcmark04 score i got was 3671. I also ran 3dmark03 and got a score of 6329, which is one of the lowest scores. I got a cpumark score of 774. The core clock on the video card is 299mhz and the memory clock is 900 mhz. How could this be?