You seem to have a very good laptop then? 
If you intend to laugh at other forumers and flame their laptop
specs, then this thread is not for you.
X4500M/HD does not have dedicated graphics, it uses
shared graphics.
As compared to a dedicated 256MB chrome itself has lost.
I can assure you, the s3 chrome is able to play graphics intense
games, with no problem. On the other hand, the X4500M/HD
is not it
lags.
Oh, if you were wondering?
That's just my laptop used for school.
I have another Nvdia equipped laptop. I did comparisons
with it and it is similar or it exceeds in performance.
My intention here is not to brag. My laptop itself sucks, but I
am stating facts from benchmarks done.
The S3 is on par with the X4500M/HD, which it self is somewhere
close to the 8400M G from Nvidia. I myself perform these benchmarks
using friends who are willing to lend me their laptops for the same
purpose. Equal test bed, to the point I underclock the CPU's in
question.
And the X4500M/HD does have a very little amount of dedicated
memory, around 8MB, for its own operations, BIOS etc. Same goes for
any IGP.