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Lapping a Core 2 Duo? - Page 3

post #21 of 31
Make sure when lapping that you cover the electronic part with the plastic cover that came the CPU. And use as little water as possible.
Usually the processes is up and down or side to side 5 times and rotate the CPU 90°. Use the coarsest paper (220 -400) til it's uniformly flat before moving on to higher grits.
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post #22 of 31
Quote:
Originally Posted by reezin14 View Post
I put an X in permanent marker on the cpu and sanded til it came off,then I repeated the process with the same grit using 200 to 2000. I also found with practicing on a old cpu that using the 8 motion left deeper scratches, so I stuck with the up & down motion.
Permanent marker x is a great idea.
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post #23 of 31
Thread Starter 
Forgot one important question,
How do I hold the processor while I lap it?
Do I just apply slight pressure on top of the plastic lid, or do I hold it by the sides?
post #24 of 31
Quote:
Originally Posted by OJX View Post
Forgot one important question,
How do I hold the processor while I lap it?
Do I just apply slight pressure on top of the plastic lid, or do I hold it by the sides?
Try to apply even pressure on the center, but you will not get it perfect, this is why you should rotate the processor every few minutes to ensure it gets even treatment on all sides.

EDIT: Actually when I said center, that was misleading, I held mine on the sides but tried to keep pressure towards the center, of course make sure you have the CPU contacts covered.
Edited by Jacko87 - 6/18/08 at 8:08pm
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post #25 of 31
It may be prudent to put the IC protector on the chip when handling it.

As already mentioned, flat is paramount, shiny is secondary; the latter is not indicitive of the former.

To ensure flatness I use an inkpad. I blot the IHS and then give it one whisk accross the paper. Then I look at the IHS to see how uneven it is, and where it is high/low.

Then I blot again and start to lap.
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post #26 of 31
Quote:
Originally Posted by whe3ls View Post
you want a small peice of glass and wet/dry sandpaper for 220-1500 this is what i use any away. 220 gets the chip rather flat. then 400 then 800 then 1200 then 1500 if i have it
I did 600/1000, no cleaning, no q-tips, slapped it back together, and about 7C on idle and 2-5C on full orthos (not sure yet until it sets in)

PS: I just taped the sandpaper to my granite counter top and slid it around while occassionally spinning it. Then again, don't do what I did, I like to cut corners (Yet again, my 3.402ghz E2180 is blowing room temp air into my office right now)
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post #27 of 31
I lapped my E6600 last night, and in the process, I ended up lapping the side of my thumb as well (yes, there was blood) . I did my best to keep it (and the rest of my fingers) from coming into contact with the sandpaper, but during the 10000 or so strokes, it's kinda hard to do so for the entire time. They also got sore from the pressure of holding onto the sides of the processor for so long. I tried using the plastic cover on the cpu, but before long the smaller side clips broke, and made it very difficult to keep it on, and I eventually ended up chucking it (but cleaned both sides of the cpu thoroughly afterwards). My question is what do you guys do to prevent soreness to your fingers? I tried using various gloves I had (did not have any latex or rubber gloves on hand, so I had to use my work and leather gloves), but they were too thick and started contacting the sandpaper and rubbing off on it.
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post #28 of 31
You should let the processor's weight do the job and not put too much pressure on it, as you might cause the edges to round off from the uneven pressure...

Also, I do figure-eights on the sand paper instead of doing up-downs-left rights...
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post #29 of 31
Quote:
Originally Posted by RShannonCA View Post
I lapped my E6600 last night, and in the process, I ended up lapping the side of my thumb as well (yes, there was blood) . I did my best to keep it (and the rest of my fingers) from coming into contact with the sandpaper, but during the 10000 or so strokes, it's kinda hard to do so for the entire time. They also got sore from the pressure of holding onto the sides of the processor for so long. I tried using the plastic cover on the cpu, but before long the smaller side clips broke, and made it very difficult to keep it on, and I eventually ended up chucking it (but cleaned both sides of the cpu thoroughly afterwards). My question is what do you guys do to prevent soreness to your fingers? I tried using various gloves I had (did not have any latex or rubber gloves on hand, so I had to use my work and leather gloves), but they were too thick and started contacting the sandpaper and rubbing off on it.
I've never lapped before, but I have an idea that might help you out. Tape down two metal rulers between the CPU on the sand paper. The rulers will act as rails for your fingers. You will be able to glide the CPU up and down easily. The rulers will also help keep the CPU in place. Good luck.

post #30 of 31
Quote:
Originally Posted by goongler View Post
I've never lapped before, but I have an idea that might help you out. Tape down two metal rulers between the CPU on the sand paper. The rulers will act as rails for your fingers. You will be able to glide the CPU up and down easily. The rulers will also help keep the CPU in place. Good luck.

That's actually a great idea!
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