TO LAP OR NOT TO LAP?

louie101086

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Mar 29, 2007
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I JUST BROUGHT MY E6600 DUAL CORE AND MY APOGEE GT. SHOULD I LAP ONE OF THEM OR BOTH OF THEM? I SEEN LOTS OF GOOD RESULTS BUT DONT KNOW IF I SHOULD DO ONE OR BOTH.
 
It really doesn't do good to lap only one without the other....

Imagine 2 pieces of sandpaper.....you smooth one out....but not the other. You then try to put them together. You would then notice that one side is still rougher than ideal and doesn't make for a good mating surface. You would then have to smooth out the 2nd piece of sandpaper....

Thus, it would be better to do both sides.
 

louie101086

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Mar 29, 2007
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ok so does a apogee gt have a mirror finish i can see my self in its reflection. and also do i need to lap the cpu i have a e6600
 
If the block is mirror finished, AND has NO blemishes...you shouldn't have to lap it.

I do lap both sides in most cases, and it can drop temps anywhere from 2-8 degrees Celcius, based on my experiences, and the types of heatsinks/blocks/etc... that I have used.
 

tool_462

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Jun 19, 2006
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I highly recommend that you DONT lap your CPUs IHS. Only if you are pushing your CPU to the limit are you going to ever benefit from a few degrees saved.

Judging by your use of all caps in a forum post, I don't think you are ready to undertake the potentially damaging task of lapping an IHS on a Core 2 Duo CPU.
 

rodney_ws

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Dec 29, 2005
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I highly recommend that you DONT lap your CPUs IHS. Only if you are pushing your CPU to the limit are you going to ever benefit from a few degrees saved.

Judging by your use of all caps in a forum post, I don't think you are ready to undertake the potentially damaging task of lapping an IHS on a Core 2 Duo CPU.
Isn't this why Arctic 5 was invented?
 

Aivas47a

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Oct 27, 2006
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The Swiftech waterblocks are generally well machined and shouldn't need additional lapping. CPU heatspreaders, on the other hand, are often uneven (try placing the edge of a razorblade on the heatspreader with a good light behind it and you may be able to see gaps). If you can sand out the unevenness of the heatspreader you will have better contact with the heatsink and can improve your temperatures (1-3C degrees in my experience).

You should recognize, however, that lapping will void your cpu warranty and really is not worthwhile unless you are overclocking to the very edge of your processor's thermal envelope but still want to extract a few extra mhz.

No offense intended, but as a prior poster suggested I would tend to recommend that folks who use ALL CAPS in order to get questions answered sooner should not lap their cpus. :wink:
 

GrowLLLTigeRRR

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Jul 21, 2008
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I'm trying to decide myself if a potential of 5 degrees cooler warrants the bother of lapping anything. I've lapped chisels before for timber framing and it is a royal pain. I just ordered a Thermalright Ultra 120 extreme for an Intel Dual Core 3.0 GHz processor and I've heard the Thermalrights have some issues with quality control, I can't get their website to work, and they haven't answered any of my E-messages. I might buy something else if I had it to do over but alas the deed is done.

Anyways, I don't know if lapping is worth it unless you like to lap.

BTW in reference to a post up there ^ ; I believe the main purpose of lapping is not necessarily to obtain a mirror finish but to flatten the surfaces so that there is more contact area. Of course polishing a flat surface will enhance that but you can have a polished surface that is not flat, like your granny's teapot, and though some of the heat sinks are polished, they may not be flat.

Jus my two cents.
 

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