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Lapping question

post #1 of 9
Thread Starter 
I noticed that my lap job, although very nice, might not be up to par.

My question is: I noticed that the very edges are still curved down toward the chip, is that O.K. as long as the area in the center is flat, and the only inconsistency in the flatness is at the edge sloping down?
post #2 of 9
Well how far did you lap? Is your IHS a shiny copper? Or did you just mildly lap?
    
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post #3 of 9
The more surface area the better the cooling. Although it may be small every little bit helps. The biggest factor is to make sure that the lap is flat over shiny.

People like shiny, but flat is what gets the temp drops. If the sloping edges are the only part of the lap that went awry then don't worry too much.

Can you post a picture so we can see the slopes more clearly defined?
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post #4 of 9
Thread Starter 
Oh yeah, it's down to copper and I did the graph paper test, that's how I found out that the edge's are very slightly sloped still. The majority of it is nice and flat. I know I should have lapped more with the 220 grit and got down a little farther, but is it O.K. the way it is?

This was my first lap job and really only a test before I do my BT and my other 3600X2
post #5 of 9
Quote:
Originally Posted by PR1M3R View Post
I noticed that my lap job, although very nice, might not be up to par.

My question is: I noticed that the very edges are still curved down toward the chip, is that O.K. as long as the area in the center is flat, and the only inconsistency in the flatness is at the edge sloping down?
It depends on your IHS. If your IHS bulges out in the middle, then the area where the cores are may make contact with the HSF's base properly.

However, with lapping, flatter is better.

(I'm actually curious as to why the edges are still not as flat as the middle of the base. What was your technique like?)
    
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post #6 of 9
Thread Starter 
I used a piece of glass from a picture frame ( yeah it's flat, it was an expensive picture ) and went 220, 300,400,600,1000,1500.

I just don't think I spent enough time on it, I can be very impatient.
LL
post #7 of 9
Well, your temperatures will tell you if your lap job was good enough, more than anything else.

Start testing, man!
    
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post #8 of 9
Thread Starter 
pic added on last post, I did the polishing after that picture.
post #9 of 9
Nah it seems pretty flat...but cant tell truly from that pic...reflect something off of it but take the picture from far away...if the picture is distorted then it isnt as flat as you think...if the picture is a perfect reflection...then its flat as..well flat.
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