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what is lapped? or lapping?

post #1 of 23
Thread Starter 
i always see this in what kind of cpu people have, like Lapped opty 165 or lapped this or lapped taht. what is lapped?????
its buggin me so freakin bad
post #2 of 23
Lapped means that they have already took sand paper and sanded off the nickel part of the CPU and to get the heat sink and CPU to the copper piece with flat surface. Making them into a mirror finish is something else.



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post #3 of 23
Thread Starter 
wait so like that metal cover? they just sand it off? so the bare cpu is showing? does this give better cooling or what? it sounds dangerous.
post #4 of 23
Thread Starter 
oh, your pics just showed up now
post #5 of 23
Quote:
Originally Posted by II Dank II View Post
wait so like that metal cover? they just sand it off? so the bare cpu is showing? does this give better cooling or what? it sounds dangerous.
I don't know what you mean by bare, but it's usually down to the copper piece and making both surface flat.

Yes, lapping will result in better cooling if it is done right. My idle and load temps have dropped around 4-6C.
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post #6 of 23
alot better thermal junction when cpu and heatsink are lapped
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post #7 of 23
^Thx for info! +rep.

I also wasn't quite sure what lapping ment, I didn't even know you could lap a CPU, i thought only a HS.
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post #8 of 23
lapped means they've sanded the CPU heatspreader flat using extremely high grit sandpaper, as sometimes they come in various "shapes" rather than flat. it's got its aesthetic plusses (copper, shiny) but the main reason is to give a flat surface for optimal heat transfer.

same process happens with CPU heatsinks as well
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post #9 of 23
Thread Starter 
is it worth a try? or is it risky
post #10 of 23
it's your call if you want to lap or not, honestly

quick test on whether your CPU heatspreader (silver thing on top) and/or CPU heatsink is flat:
take a new razor-blade and lightly put it blade-down against the length of the heatspreader/heatsink base. if you can see light then you've got a warped one and you could see some significant gains from lapping otherwise i'd say don't worry about it unless you want to eke out an extra few C's off temps and maybe get a few more MHz OC

i honestly don't have the courage to do it XD

edit-----------
although there's very real risks involved:
1) bending pins on the back of the CPU
2) doing a poor lapping job and it ends up even more uneven
3) damaging the CPU itself if you don't do some reading and preparation
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Windows 7 Pro 64-bit 25.5" ASUS VW266H Logitech Wave Antec TruePower New 750W 
CaseMouse
Rocketfish Full Tower Logitech MX1000 
CPUMotherboardGraphicsRAM
X2 3800+ ASUS A8N-SLI Premium SLI 8800GTS 512MB 4x 512mb Corsair/Kingston 
Hard DriveOptical DriveOSMonitor
2x 250GB WD Caviar 2x NEC 3550 Windows XP SP3 ASUS 26" 16:10 
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