
All the benchmarks were taken from www.notebookcheck.net.
The results are quite reliable, I have used this source for years.
According to benchmarks, HD3000 is BETTER than 320M !
Also, remember that 320M has 256MB of shared memory,
while HD3000 has 384MB - 1.5x more memory for game textures!
But it is worse than 330M GT, if don't count the Cinebench.
Hope this information will help you to make a right choice.