The max for Vista scores is 5.9. I couldnt tell you what kind of scores you would get because it measures CPU, Memory, Hard Drive, Graphics and Gaming Graphics. Your score is actually rated by your lowest subscore. My dual core AMD 64 +3500 garnered a 5.4, but because my Graphics only got a 3.8, my Index score is 3.8. I was running with onboard GPU and just adding a new video card raised my graphics .7 and freed some memory which raised that score by 1.6 points to a 4.9. Not real sure why they decided that 5.9 would be the max, but who am i to question.