That score is just fine. NEVER ever, ever, ever, ever base a graphics cards capabilities SOLEY on 3DMark 06. ATI cards usually score quite high in 3DMark06 but often perform worse than Nvidia's offerings. (Example: 2900XT) It had a great 3Dmark score, but was very meager in game performance. I used to get just over 12K with my 8800GTX and E6600 @3.4Ghz, so your score seems right in line. Run some gaming benchmarks and you will clearly see that your GTS is more powerful than the 3850. - Annisman
Yes, I would play some games and use fraps to see your frame rates. Judge more by the game play and visualization than the score. It does feel good to see a higher score I will admit but thats not everything.