Likely had to do more with the speed and bandwidth of the memory....That score is better then most systems running any of the GF3 cards....
I get right at 10000 with my system 1.6@2.74ghz with 333mhz ddr at cas 2 with a Radeon le 64mb 250/250 (non-oc'd vid card)...So to say the least I am impressed with that good of a score with a 2 year old vid card!!!