no, no how you are coming up with multipliers? Yes the gpu part of the llamo probably is the new version of the celeron-300
, but there shouldn't be any multiplier on the gpu (I can change it on the cpu all I want btw).
I more and more supect AMD already knew of the capabilities of the integrated gpu and took special measures to prevent further overclocking and giving out a waver for stock overclocking to the mainboard manufacturers. (Possible to still be able to sell their remaining stocks of low end cards or whatever)
I can't possible imagine a hardware lock on the clock and to my knowledge this wouldn't even be possible.
So either it is somewhere in the bios or it is just a driver issue.