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Brasso to "lap"

Originally posted by: aigomorla
<div class="FTQUOTE"><begin quote>Originally posted by: CDC Mail Guy
It's REALLY shiny! The camera really does it no justice at all. 🙂

http://star.walagata.com/w/gonzo69/Apogee_002.jpg</end quote></div>

its recomended that you dont use anything like that. I suggest you wipe it off with some iso. The brasso can cause interference in heat transfer.
Click to expand...

I did already. What's wrong with the picture? The reflection is what matters the most after all right? 🙂
 
Originally posted by: CDC Mail Guy
<div class="FTQUOTE"><begin quote>Originally posted by: aigomorla
<div class="FTQUOTE"><begin quote>Originally posted by: CDC Mail Guy
It's REALLY shiny! The camera really does it no justice at all. 🙂

http://star.walagata.com/w/gonzo69/Apogee_002.jpg</end quote></div>

its recomended that you dont use anything like that. I suggest you wipe it off with some iso. The brasso can cause interference in heat transfer.</end quote></div>

I did already. What's wrong with the picture? The reflection is what matters the most after all right? 🙂
Click to expand...

Shiny? I thought the thing that matters was the temps...
 
Even if you did wipe away the Brasso with ipa, there might still be some left on the heatsink. It might take more lapping just to get rid of it.
 
Originally posted by: CDC Mail Guy
<div class="FTQUOTE"><begin quote>Originally posted by: aigomorla
<div class="FTQUOTE"><begin quote>Originally posted by: CDC Mail Guy
It's REALLY shiny! The camera really does it no justice at all. 🙂

http://star.walagata.com/w/gonzo69/Apogee_002.jpg</end quote></div>

its recomended that you dont use anything like that. I suggest you wipe it off with some iso. The brasso can cause interference in heat transfer.</end quote></div>

I did already. What's wrong with the picture? The reflection is what matters the most after all right? 🙂
Click to expand...

Not really.
What matters is flatness; not being shiny.

You can have a non-flat surface that is very shiny. That would be a horrible sink.
 
Originally posted by: CDC Mail Guy
<div class="FTQUOTE"><begin quote>Originally posted by: aigomorla
<div class="FTQUOTE"><begin quote>Originally posted by: CDC Mail Guy
It's REALLY shiny! The camera really does it no justice at all. 🙂

http://star.walagata.com/w/gonzo69/Apogee_002.jpg</end quote></div>

its recomended that you dont use anything like that. I suggest you wipe it off with some iso. The brasso can cause interference in heat transfer.</end quote></div>

I did already. What's wrong with the picture? The reflection is what matters the most after all right? 🙂
Click to expand...

flatness is def more important then a nice reflection. Whats wrong with the picture is that it is blurry!!! take an in focus picture if you want to show it off 😉

I've read elsewhere on this forum that main heatsinks nowadays are slightly bowed on purpose to extend the life of the cpu, so you are actually hurting the life of the cpu, even if its colder during its shorter life.

 
Like someone finally got around to mentioning, it's the flatness - not the shine. Polishing a flat heatsink can even make it worse.

.bh.
 
is there a guide for lapping?

ok, got the 2000 grit and 2500grit... um... what else do i need?

is there a sticky somewhere?

thanks!
 
Originally posted by: abhong
is there a guide for lapping?

ok, got the 2000 grit and 2500grit... um... what else do i need?

is there a sticky somewhere?

thanks!
Click to expand...

zep is correct. But if you want that mirror finish you need 2000 grit


Also u need some vegi oil. A drop on the paper to help lube the sanding.


i go like this 400 -> 700 -> 1000 -> 1500 -> 2000
 
Thanks for the helpful criticism guys, it's greatly appreciated. I guess I DO still have a lot to learn 🙂

PS: That was NOT a sarcastic reply 😛
 
On a "shiny" note, is there something that can be used to keep the shine? (This isn't for a heatsink that a processor is going to be depending on)
 
Not familiar with Abralon.

The factors to consider are the metals used in the heatsink base (silver better than copper better than aluminum), and the thermal interface between them. The base must make absolutely flat contact with the heatspreader cap to avail of the maximum area for thermal transfer, even if the processor cores are only located in the center and the heatsink base only touches that area.

The matter of "scratches" depends on the grit-size or particle size of the thermal material. really fine scratches won't hurt. Mostly, you want as many molecules of the heatsink bottom's metal touching the thinnest layer of thermal interface -- in turn giving the best contact with the heatspreader cap.

But you absolutely do not want some polishing-compound residue stuck between the heatsink base and the TIM/heatspreader-cap.

Also -- very important -- any air gaps in the combination of heatsinkbase, thermal paste and heatspreader will noticeably degrade performance.
 
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