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My 1st Lapping Attempt

just a mention, the goal is to get the surface as flat and free of imperfections as possible, not to give it a mirror finish.

using a polish like Brasso will fill all the micro-pores in the surfaces of the metal with wax that will impede the function of the thermal interface material.

in other words, you shouldn't use Brasso, Silvo, Any other type of polish or nail varnish remover (contains lingering additives that are good for nails, not good for thermal transfer)

Btw, ~TB~, you DID put the wet'n'dry paper on a sheet of glass to keep it flat, right?
 
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any ideas w3bbo to my question?

I find a sheet of glass works well. I personally dont use the figure of 8 method. I do like 20 strokes one way, rotate 90degrees then 20 strokes the other.

Worked well for me :

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As stated the mirror finish won't make any difference to temps but I did it for completeness. Also you CAN use brasso/metal polish etc aslong as you do a good job of cleaning any leftover residue of with a good solvent cleaner such as IPA.
 
i take it that Nail Varnish cleaner is not good enough?


The problem with nail varnish is it can add as much as you are taking away. Most nail vqarnish removers which are usually based on Acetone also contain a mixture of moisturisers and abrasives which will fill in those little crevices you are trying to clean. One of the good things about getting a mirror finish with paper alone is that the crevices are very minute and not as prevelent - hence being shiny and not dull;)
 
ye bit stupid question i never did lapping and want to give it a try when do exactly know when to stop lapping grinding ? the cpu ? can you lap to much and reach the cores? :confused:
 
ye bit stupid question i never did lapping and want to give it a try when do exactly know when to stop lapping grinding ? the cpu ? can you lap to much and reach the cores? :confused:

Your arm would fall off before you hit the cores ;)

It takes very little effort to level off the IHS. You only need to sand down a mm or so usually.

If you aren't going for a shiny surface, then simply use the credit card method to check that it's no longer dished, then refit the CPU and run Prime95 for a few minutes to see how flat you've got it.
 
read above a bit and it says "20 strokes turn 90 degrees, another 20 strokes, turn 90" keep going all the way round 360 degrees and see whats what then.
 
Cheers Guys

:D



On Prime it gets temps as below at Stock, which is much lower than before the lapping.

Im gonna give it a few days and get it back to 3.4 where it was before (not touched the volts all stock / auto - now or before @ 3.4)

tempsij8.png


Nice job TB well done m8 what batch number is your B3 out of interest
 
just a mention, the goal is to get the surface as flat and free of imperfections as possible, not to give it a mirror finish.

using a polish like Brasso will fill all the micro-pores in the surfaces of the metal with wax that will impede the function of the thermal interface material.

in other words, you shouldn't use Brasso, Silvo, Any other type of polish or nail varnish remover (contains lingering additives that are good for nails, not good for thermal transfer)

Btw, ~TB~, you DID put the wet'n'dry paper on a sheet of glass to keep it flat, right?

Hmm no it wont as your meant to clean it after your done with ISO PROPYLN.
 
Very very impressive and many thanks for the post and pictures. I always wondered what exactly was meant by lapping - now i know. Thanks!
 
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