Floppy, that's a bit low for the hardware you're packing...
Some other systems running Durons and Celerons are getting that much or better. I'd be willing to bet you have some settings messed up or something. Is your AGP capable and set to 4X? (or the highest capable setting?) Nothing else is running in the background? Make sure you run 3D Mark right after a clean boot with no other programs running in the background (including virus scanners). Re-post when done!
To err is human, but to really foul things up requires a computer.