Hello Tom ! 

 TW> The thermal goo is really only to fill in the imperfection and
 TW> scratches o nthe surfaced. Solid contact is the best heat tranmsfer
 TW> way. The thin film of go ois only to eliminate the smal lAir cavities
 TW> whics conduct very poorly.

        I use it very sparingly. I have a small tube of it, the size
  of a pencil eraser, and I have done 3 install so far with it and
  there is still some left. The CPU small square surface is the only
  area that needs this and only a film of it too.


 Have a great day.
  F-86 pilot.
    
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