well, in short...your shorting the life of the product...by how much...no one really knows...
That said to poster you responded to. Sadly on this site dedicated to OC'ing. Many lack real knowledge as to what they do and why they do. They get into this complicated number puzzle. They lack any kind of clear understanding of what they do or why they do. They simply have this voltage or that voltage or this timing or that timing parroted to them.
They lack any understanding of why? Or an overview. It is as said parroting. Also called mimicking. A parrot that says "close the door" does not understand English. It does say an English phrase. That is it. Same goes for 90+% here.
If you follow all the basic rules (control heat) you will be fine. It is not like notebooks and desktops follow different laws of nature, or physics.
OC your notebook unless it is an HP or has a 8600m.