these arn't available to buy. WHy don't you just call up sony and ask if you laptop can even be upgraded? be smart and you go do something instead of assuming us to do everything for you! go call up sony or who ever your notebook manufacture is and ask if it can be upgraded!
Notebooks are not like desktops. ok? you can't just open up your notebook pop out the cpu and upgrade it! Notebooks don't work that way! You ship it out if it can be upgraded and the professionals pop out the chip and pop in a new one.
If you did open your notebook you have voided all warranty and then you can't upgrade it at all.
<A HREF="http://www.anandtech.com/mysystemrig.html?id=9933" target="_new"> My Rig </A>
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