Lapping CPU/Cooler - Part 1

My First Try

Category:

People & Blogs

Tags:

• amd
• ati
• athlon
• 64
• x2
• 6000
• zerotherm
• nv120
• nirvana
• lapping
• lap
• overclock
• overclocking
• oc

[jaesungauzakim]

is it easy to lap? and how long does it takes?

[tricccple]

if u try to do a good job, probably takes 2 hours

[jaesungauzakim]

the heatsink looks more easier to lap than CPU... lol you lapped your hand too... lololololol xD

[tricccple]

cpu is easiler, cause cooler's got the edges that makes it real hard to sand down with

[JamesCizuz]

@Raptorman10

You are a moron, no one said dent of or deform anything, heat expands and contracts metal, flat surfaces become bended, that is why we bolt heat sinks down to keep them in place from this massive buckling pressure heat expansion causes. Lapping is useless because of this simple fact.

[Raptorman10]

@JamesCizuz : That's why you also lap the cooler. Two perfectly flat surfaces together isn't going to dent or disform anything.

[Raptorman10]

@gerry410 : You can test to see if your cpu or cpu cooler needs lapped by taking a razor blade or straight edge and a flashlight and putting the razor in the cpu at certain angles and see if light shines though anywhere on either of the surfaces. I tested with my cpu/cooler and they were very uneven.

[Raptorman10]

@JamesCizuz : Lapped my Noctua NH-D14 and Phenom II 1090T today and it dropped my max load temps by 8C.

[gerry410]

@thebighat99......... LOL... that my friend is a very good point.

I think its both comical and presumptuous that people think they can do a better job than the manufacturers that have spent billions $ on technologies.

However as you know boys will be boys and play with their toys.

I'm the same way. I may try this, need to read more. It may have some merit.

[thebighat99]

Why do something like this i think you miss up you cpu and your cooler if there mist up why cant you just return them to manufacture.



[tricccple]

@JamesCizuz see, that's good info to know, this is something i attempt since i'm into computers , isn't no professional tutorial or anything which i stated in the beginning

[JamesCizuz]

@tricccple

Paste is used, when the cpu is under stress and metal expands it forms a bubble in middle pushing up on cpu heatsink a small amount so the thermal paste it what keeps absolute contact. I find it funny anyone would lap a cpu "flatter" any real machinist would call them a moron due to heat dissipation which you need to take into account. Lapping is meant for objects that stay at constant temperature and need to be flat, otherwise thermal paste is required.

[JamesCizuz]

@tricccple

Even glass has a variation of 0.015 inch so not it's not very flat, and also a normal CPU has a variation of only 0.0098 inch. So in some cases you would make it worse.

However people fail to realize, that even if you could lap a cpu to a perfect flat, it won't stay that way. When you clamp down a heat sink it does put stress on CPU ruining anything you did you make it flat, and also heat dissipation makes the metal on top of cpu expand a small amount, this is in fact WHY thermal

[tricccple]

@SamDeRe81 that's why u put a glass under the sand paper, glass are pretty flat