Arctic Silver 5 Question

Is Arctic Silver 5 applied to the core of the processor, or the part of the heatsink that comes in contact with the processor [core] ?
I read instructions on their website, but its VERY confusing..

 

Yes it is.

 

It is applied/placed inbetween the processor and the heatsink to aid heat transfer, which is reduced by the small 'marks' in the surface of the heat sink and processor, thus the thermal paste overcomes said marks. On a hot running P4 as5 can help reduce temps by upto 5°C, but so far its shown very little to no advantage in the notebook market, thus if your not sure what it is and how to apply it, I would strongly advise against doing so, the non-existent benifits are surprisingly not worth it
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I applied AS5 to my Pentium M. It keeps the temperature down anywhere from 3-4*C, although they claim up to 7*. It gets better over time. That was the first time I did it, took me 40 minutes. Follow the directions on AS5's site very closely; this is not something you want to make a mistake with. If you mess up the application, you'll end up hotter than you started with, sometimes dangerously so.

 

Definitely be careful, don't rush through it. It's not a difficult prodecure, you just have to be thorough. One thing to be sure of is not to use too much of the stuff. If you put too much on it will have the opposite effect and you'll have temps way too high.