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Old 06-05-2009, 01:26 PM   #1 (permalink)
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Default A quick CPU Lapping question.

How can u be sure that you are creating a completely flat surface with the lapping process?

Sanding block? I'd be concerned about rolling the edges over.
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Old 06-05-2009, 01:41 PM   #2 (permalink)
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Default Re: A quick CPU Lapping question.

tape the sand paper down to a thick piece of glass on top of a flat table. Ideally a glass table with good 1/2" glass will be almost perfectly flat.
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Old 06-05-2009, 01:45 PM   #3 (permalink)
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Default Re: A quick CPU Lapping question.

^ Ahh ok.. I'll do my 9950 BE I've got laying around as practice. From what I've read, those need it due to their high corners.
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Old 06-05-2009, 08:58 PM   #4 (permalink)
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Default Re: A quick CPU Lapping question.

I used our glass picnic table. What veedub said is what I believe is normally recommended.
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Old 06-05-2009, 09:04 PM   #5 (permalink)
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Default Re: A quick CPU Lapping question.

i lapped both my q6600 and my true. Just remember to turn the cpu 90 degrees every 5-10 swipes. I started with 80 grit, then 120, then 400. The idea is flat, not so much shiny. Each time you move down grit, use a sharpie and color the whole cpu, it will show low spots.
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Old 06-05-2009, 09:17 PM   #6 (permalink)
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Default Re: A quick CPU Lapping question.

Quote:
Originally Posted by veedubfreak View Post
i lapped both my q6600 and my true. Just remember to turn the cpu 90 degrees every 5-10 swipes. I started with 80 grit, then 120, then 400. The idea is flat, not so much shiny. Each time you move down grit, use a sharpie and color the whole cpu, it will show low spots.
Now that's something I didn't do. Wish I would have read that somewhere. Good advice.
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Old 06-05-2009, 10:07 PM   #7 (permalink)
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Default Re: A quick CPU Lapping question.

Quote:
Originally Posted by toxicity_27 View Post
Now that's something I didn't do. Wish I would have read that somewhere. Good advice.
Just an old trick from doing auto body work.
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Old 06-06-2009, 01:42 AM   #8 (permalink)
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Default Re: A quick CPU Lapping question.

^ Good idea... You're not in Vegas are you? lol.. I know a VW guy in Vegas that manages a Bodyshop.. I did some photo shoots of his car for him while I was there..
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Old 06-06-2009, 02:37 AM   #9 (permalink)
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Default Re: A quick CPU Lapping question.

nah, but my first car was a 68 bug that i built from the ground up, including all bodywork, engine, electrical, etc. I dont do bodywork anymore I'd rather pay someone to do it.
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Old 06-06-2009, 12:58 PM   #10 (permalink)
 
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Default Re: A quick CPU Lapping question.

I have a question about lapping too, I don't want to hijack the thread but I didn't feel it was necessary to start a new topic.

Is lapping the cpu and lapping the heatsink two different things? Sometimes I see people refer to lapping as doing it to a heatsink, and others refer to it as doing it to a cpu.
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