HP with 630M overclock

How can people with a 630M overclock the GPU?

I know that not many of you people here will have a 650M, but for some people it is not an option they could select, or they simply may have brought a pre-built model with the GPU.

I have attempted to overclock the 630M in the HP, but it seems that it does not move?
Weird thing is GPU-Z reports inaccurate clocks, much the same as other software. So cannot be be sure if anything has changed, benchmarks are reflecting no gains.

Does anyone here know how to overclock with the supplied HP 630M driver, if so then how, if no then what.

Update
Well waiting for an answer for a day or two and nothing happening, I find out that I am answering some of my own questions.

Appears that the 661MHz core which the sensor shows, jumps to 797MHz. After watching for awhile, seem that the boost clock is working. Weird though as I though the Fermi didn't have boost, but this does.
If this is the real speed, then I don't think there is much more in this if it could be overclocked?

I have found a way to overclock it, although I don't have control over the core, I can overclock the memory, and it clocks very high. I was able to get up to 380MHz above stock to 1280MHz, but that gave me artifacts.

In the end I could get a 315MHz overclock, with the graphics perfectly intact, brings in a total up from 900MHz stock clocks to a good 1215MHz

Tested with 3dmark11, and these are the scores, stock and then overclocked.



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Stock


Overclocked