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how safe is lapping

I use electrical tape that I attach around all 4 sides, starting from the vertical sides of the IHS and going around to the back where I have a small square of kitchen paper. Once all 4 sides of tape are stuck down I cut small pieces of tape and do the 4 corners, then put a cube over the middle bit of kitchen paper that shows on the back. This makes it pretty well waterproof, I don't have to worry about cleaning anything, job done.

Personally I wouldn't dream of lapping without water. It helps to move the sanded debris out of the way, allowing for a smoother finish. I could never, ever get as good a finish doing it dry. Tried it once on a disused IHS and the results were poor in comparison imo.
 
Mr Footlong said:
Personally I wouldn't dream of lapping without water. It helps to move the sanded debris out of the way, allowing for a smoother finish. I could never, ever get as good a finish doing it dry. Tried it once on a disused IHS and the results were poor in comparison imo.
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i agree completely, although i didn't go to your lengths sealing with electrical tape.....just used that piece of black plastic that the chip came in.
 
Gashman said:
do all you people waste all this time lapping by hand, why not use a dremel or something? :p
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all up took me about 45-60mins ....watched a couple of alan partridge episiodes and it was done.
 
marscay said:
i agree completely, although i didn't go to your lengths sealing with electrical tape.....just used that piece of black plastic that the chip came in.
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Me=Virgo=Perfectionist and then some sadly. Yeah it takes me an hour-90 mins on avg depending on just how good a finish I want. Having a glass table in the living room helps a lot.
 
Mr Footlong said:
Me=Virgo=Perfectionist and then some sadly. Yeah it takes me an hour-90 mins on avg depending on just how good a finish I want. Having a glass table in the living room helps a lot.
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and how long would it take with a dremel? ;)
 
Gashman said:
and how long would it take with a dremel? ;)
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Umm, what they were getting at before is that a Dremel wouldn't work. The whole idea is to sand it flat using a flat surface. I struggle to think of a way a Dremel might possibly even begin to work.

Though it would be amusing to read about you destroying a CPU through ignorance, I'm a nice guy. :p
 
Gashman said:
and how long would it take with a dremel? ;)
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there's a great chance you would make temps worse ....you'd be dremeling until you reach the core to try and fix it :)

but yes it would make an interesting read if someone tried it.
 
BillytheImpaler said:
Umm, what they were getting at before is that a Dremel wouldn't work. The whole idea is to sand it flat using a flat surface. I struggle to think of a way a Dremel might possibly even begin to work.

Though it would be amusing to read about you destroying a CPU through ignorance, I'm a nice guy. :p
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ok what about something better, like a belt sander? not planning on lapping, just wondering if theres a better way to do it than sitting for ages rubbing it with sand paper, which sounds pretty inaccurate as well...
 
It takes about 10/15 minutes to lap the cpu. Did mine last week and it idles at 23/24 idle @ 3400MHz.

I would not risk anything other than doing it by hand.
 
Gashman said:
ok what about something better, like a belt sander? not planning on lapping, just wondering if theres a better way to do it than sitting for ages rubbing it with sand paper, which sounds pretty inaccurate as well...
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You need to do some research into the procedure. You don't want it to be fast, you want it to work well. It's not like sanding some piece of wood, you're trying to put a mirror finish on a piece of nickel plated copper. Research polishing methods used in industry. They are similar in scope to the simple lapping methods overclockers use.
 
BillytheImpaler said:
You need to do some research into the procedure. You don't want it to be fast, you want it to work well. It's not like sanding some piece of wood, you're trying to put a mirror finish on a piece of nickel plated copper. Research polishing methods used in industry. They are similar in scope to the simple lapping methods overclockers use.
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you can get fantastic finish with power tools, got mirror finish on some rusted up steel when was making robot wars machine, which never got finished :( , that was using rotary sander on a dremel like tool

Edit: and it was more or less flat, you could see a good reflection
 
I lapped mine and was shocked at how concave the IHS was.
Maybe some C2D's are flater than others but mine was very concave.
Whether its only a few degrees you shave off, every little bit helps. A few degrees with lapping, a few degrees with a decent application of thermal compound, a few degrees with decent case cooling, it all add's up.
With all the above, you could save 10C and come summer thats a big bonus and maybe you wont ave to drop your clocks like lots of people on here had to do. :D
 
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