is your video card overclocked? since 3dmark11 is primarily video card based this greatly affects the scoring. Though it looks like your actually grouped within the average of users running similar hardware to you your part of 73 results for your test group. Next closest being 65 which is 100 points higher than your score.
Their scoring is kind of weird anyways, since the majority of people that submit are overclocking it can show systems that have a mild overclock as performing under the expected performance levels.
The more you can juice out of your video card the better the score generally in this benchmark, Though increased processor speed will also help on the physics and combined physiscs tests.
You can also browse the other user submitted results and get a idea of what they are running speedwise, its not super accurate, but it can give you an idea of if they are beating due to cpu or video overclocking.
