Noob question here, why do we need to use a dishwashing liquid in lapping process?

dishwashing liquid works as a lubricant so that u can slide the heatsink over the sandpaper easier.

Hmm...

That's a good guide...

But, one question though, about my both of my XP120..
The base, it's rough, not really nice, both of 'em...

The base is copper, but nickel plated right?
Nickel is better heat absorber than copper isn't it?

So, if i lap the base to mirror shine, wouldn't that make the base to a less heat absorber?

Hey don't mad at me, i'm a newbie in lapping here...

This post has been edited by sHawTY: Nov 6 2006, 03:58 AM

nice job neoxz...... mind to tell me how to choose the sand paper.... ( dont know how to ask the seller for the sand paper, wat size, grade(?))....noob

i don understand why they used nikel coating. As the matter of fact, copper is the best in heat conducting. nickel has only better heat capacity than the copper yet its heat conductivity is far less than copper. for me i'll just lap of the nikel coating.

how bout RMA?if i lapped my g power will it void the warantty?if u said is true then i'll get my project started

Yes, i think it will void your warranty. Wrong methods of lapping will results in opposite effects.

ic ic so have to do slowly and carefully ermmm....minus 10c is temping

@shawty

ur gonna need some real patience to lap the nickle plate off all the way to the copper base.....i took quite a long time. but after i got the mirror shine on the copper base it was nice and smooth and gave me a 10C drop. so i think it would be worth it.

just need to have patience..once u have sanded the nickle plate totally off.. ur good to go

as for the base.... i guess its the machining process that made it rough. mine was the same too. but now not anymore

i wish u can help me with mine btw how long it took to finish lapping?1-2hrs?

I didnt check the time when i started anyways, updated the front page with a lapping guide taken from overclockersclub.com

thnx !!!do we really need the metal polish thingy?not use also can rite?

In terms of stability on air,
nickel would have a more stable condition compared to the copper
this layer of nickel actually helps prevent the copper from oxidation.

source : http://en.wikipedia.org/wiki/Nickel

Nope. Dont need that.

Thanks for your input. I cannot reply all without ur help. BTW, lapping will make ur copper more prone to oxidation.

in simple term u have to relap it again in a few months laa....ic ic...

not really la.

As long as you doesn't expose the copper surface to the air often by removing the heatsink frequently.

lapping the nickle plating off took me VERY long... about 1-2 days. yes days. but that was mainly because i moved onto the next grit too soon... coz after that only i started seeing the copper base... and then only i decided to lap the nickle plate off to the copper base. if i knew earlier and if i stuck with a lower grit/ rougher sandpaper im sure it wouldnt have taken so long.

but after the nickle came off.... everything just took about 1 hour only to get the mirror finish copper base

I just bought a scnj-1000p ninja but the speedfan v4.31 shows that my idle temp is 48 C when i am playing game it up to 58C. But when using the measuring tools to measure it, the temp idle is 28C and when playing game is aournd 34C. So is it my mb sensor go crazy? Do i hv solution to c my exact temp other than using measuring tools?

though this practice is not recomended
cause
over-lapping your heat block will reduce the thickness and reduce the pressure applied to the clamp,
thus reducing touch area

yeah but still
oxidation still can happen but only at a slower rate


where did you measure
same like measuring your body heat
mouth temp is not the same as the skin temp is not the same with the butt temp is not the same with the liver temp
you knoe...