3Gb of ram will only help you if you're running SH4 1.3 (since 1.4 has a big memory optimization) AND draw a wall size poster in Photoshop AND run a web server at the same time.
Now, back to the question, please ignore the Vista performance index. It takes 3D Mark 10 minutes to compute a score and, yet, Vista claims it can do it in a millisecond. Or a whole minute if you only have 512 mb of ram
