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Can You Lapped A CPU With Any Kind Of SandPaper - Page 4

post #31 of 43
That is like saying can you use Crisp and Dry cooking oil on your processor LOL!
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post #32 of 43
Quote:
Originally Posted by purpleannex View Post
If a jobs worth doing, it's worth doing right! LOL
It's all for looks, however.......who's gonna see it since there'll be a cooler sitting on top of that pretty mirror finish?

Personally, I just take em to ~1500 grit, and if I really want them to look snazzy, I'll polish them out.
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post #33 of 43
i dont know if people have said this already but wet dry sandpaper has to be used while wet. so moisten the cpu or the sandpaper.
 
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post #34 of 43
Quote:
Originally Posted by srsparky32 View Post
i dont know if people have said this already but wet dry sandpaper has to be used while wet. so moisten the cpu or the sandpaper.
There isn't necessarily "wet" sandpaper, it's usually wet or dry sandpaper and can be used either way. However, if you use it wet, you get a lot more "life" out of it since the material you're sanding off doesn't plug it up. Wetting it also helps keep it cool, once again extending its longevity.
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post #35 of 43
Quote:
Originally Posted by BlackOmega View Post
And another note about lapping, especially when mating 2 lapped surfaces together. You need to go with a with a thinner TIM. Something like that white pigeon poop that comes with most CPU's.

Also, you have to use TIM very sparingly mating two perfect surfaces together.
Most TIMs will spread to a nice thin bond-line at high temperature and pressure.

No need to go with super spreadable TIM, or be too fussy about the amount used.

Quote:
Originally Posted by purpleannex View Post
If a jobs worth doing, it's worth doing right! LOL
800-1000 grit is a job done "right". Past that there is virtually never a performance improvement, and spending time and money lapping a chip to a perfect mirror finish is a consummate waste, as such a finish will never be seen in use.

Quote:
Originally Posted by BallaTheFeared View Post
Air cooling is never "very good".

Save yourself the possible destruction of your chip and go under water.
Lapping will help just as much, if not more, with water.

The flatness of the CPU, not the type of cooling, should determine whether lapping is called for.

Quote:
Originally Posted by BlackOmega View Post
There isn't necessarily "wet" sandpaper, it's usually wet or dry sandpaper and can be used either way. However, if you use it wet, you get a lot more "life" out of it since the material you're sanding off doesn't plug it up. Wetting it also helps keep it cool, once again extending its longevity.
Yep.
Edited by Blameless - 12/31/10 at 4:25pm
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post #36 of 43
I use 1500 and 2000+ sandpaper.
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post #37 of 43
Quote:
Originally Posted by Blameless View Post
Lapping will help just as much, if not more, with water.
I think my point was sanding down a $300 cpu to use a $60 air cooler on would be a failure in logic.

Now if he got a custom loop or even a decent kit and still wasn't happy with his temps he could attempt the lapping, but until then lapping is a last resort imo.


Though I destroy a lot of my items, so voiding the warranty is something I can't see myself doing.
    
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post #38 of 43
Quote:
Originally Posted by Blameless View Post
Most TIMs will spread to a nice thin bond-line at high temperature and pressure.

No need to go with super spreadable TIM, or be too fussy about the amount used.
It's through my own testing that I've found that the pigeon poop TIM works the best in between 2 lapped surfaces.
The different TIM's I've tried were, AS5, ICD7, OCZ freeze and some generic pigeon poop. There was a difference between the thicker pastes and the pigeon poop. Granted, not a whole helluva lot, but it was there. Not to mention, there's no cure time required.

As for the amount, well that matters too. Of course, it matters on what socket you're using this on, as some sockets wont be able to apply as much pressure as others.

FWIW, my findings were on AMD CPUs'.
Quote:
Originally Posted by BallaTheFeared View Post
I think my point was sanding down a $300 cpu to use a $60 air cooler on would be a failure in logic.

Now if he got a custom loop or even a decent kit and still wasn't happy with his temps he could attempt the lapping, but until then lapping is a last resort imo.


Though I destroy a lot of my items, so voiding the warranty is something I can't see myself doing.
To each their own.

Lapping, even for a "crappy" air cooler, if done correctly, will improve temps by quite a bit.
After lapping my x3 720 and running my lapped Big Typhoon, it dropped both idle and load temps considerably.
On my 939 rigs, I was able to extract 200 MHz more simply because it was lapped.
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post #39 of 43
Ahh nice, I load up around 16c in LinX these days, less when folding so I have no reason to lap my chip, and my chip is pretty flat anyways.
    
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post #40 of 43
Honestly, I wouldn't bother voiding my CPU's warranty if I were you. Especially since you're already at 4ghz.
    
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