Your score is completely normal. However the test isn't intensive at all. In the CPU test 3DMARK06 leaves all graphic processing to the CPU. Because a CPU isn't build for graphic processing at all, you get extremely pour performance.
This is because processing graphics as all about processing tasks in parallel. Your CPU has two cores so it can do two things at one time. Your GPU however has 800 cores, so it can processs 800 things at one time