And you are sure that its the same version 3d mark? theres an 05 version which will increase the score due to the test settings. So you cant compare both an 06 vs 05 version of 3d mark.
Your CPU score is really high regardless..my E6300 only gets 3100. However these are synthetic benchmarks as well and my E6300 games around what your Q6600 does. Vista can give you a pretty big performance hit.