Asus g72Gx heelp with undervolt.

First I read the basic undervolt guide, and I seem to be having an issue with ORTHOS.
It only seems to stress 2 of the 4 cores in my q9000 and I don't see a way to change that.
the reason I was interested in undervolting is because I always seem to be burning up the nvidia gtx 260m chips in these laptops.
I have had asus replace 2 already once a g71 they upgraded me to the g72, and now they just replaced my g72 as well, with another.
They have only lasted 3 months each! I used the hwmonitor and saw may gpu was a scorching 97c! Since my laptop is running 24-7....
I guess that really kills it.
I am also looking for a guru to asist me I want this done right and possibly undervolt the gpu.

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