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Can You Lapped A CPU With Any Kind Of SandPaper - Page 2

post #11 of 43
Quote:
Originally Posted by vspec View Post
OcSlave, your cpu must not have been very concave then.
Ah, so that was it then.
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post #12 of 43
You can use any sandpaper, but it might be a bit rough afterwards! LOL

BTW, I did my 940, i saw ~5°C drop. But in all honesty, if youo're unhappy with temps, i think you're better off just getting better cooling.
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post #13 of 43
Thread Starter 
@purpleannex, my cooling is very good. but whatever lower my temps i will try.
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post #14 of 43
You want to buy something like this.

Start off with a low grit, then gradually increase up to as hi as you can find, i can't remember exactly but think you can get 3000-5000 grit? Doesn't matter anyway, find the highest you can. Don't do the whole job with 120 grit!
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post #15 of 43
Quote:
Originally Posted by AWESOME_3_SOME View Post
@purpleannex, my cooling is very good. but whatever lower my temps i will try.
Fair enough, but if thats the case it could be asked why are you trying to lower your temps?
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post #16 of 43
Thread Starter 
@purpleannex, cause i'm still getting 80 degrees after 30 minutes of prime95. even with the thermalright silver arrow i'm getting those temps, i guess after i lapped my cpu i'm going to get the Rasa RX240 Watercooling kit and get those temps i really want below 65 degrees after 8 hours of prime95
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post #17 of 43
Quote:
Originally Posted by OcSlave View Post
Hi there,
i lapped my old phenom 940, took about 3h of boring sanding down, i thought i got a good finish as i could see myself in the reflection.
Tobe honest temps was still the same, maybe 1c lower.
So from my experience id say do'nt bother lapping, it does'nt really do anything, and the bit it does do is'nt worth the aggrevation of doing it.
There is allso a risk that you may damage the cpu while lapping aswell as voiding warrenty.
Just thought i'd share my experience, i would allso never lap a cpu again, just not worth it.
Then you did something wrong. Every CPU, or anything else for that matter that I've lapped (NB cooler, heat sinks, etc.) have had at least a 10C drop. Hell, my old lapped x3 720 and lapped Big Typhoon would never see over 49C --and that was after 18 hours of Prime95. (@ 1.5v)
The NB I lapped dropped temps 10C as well.

However, to get the most effect from lapping, the cooler has to be lapped as well, especially if the surface is REALLY rough.
Quote:
Originally Posted by purpleannex View Post
You want to buy something like this.

Start off with a low grit, then gradually increase up to as hi as you can find, i can't remember exactly but think you can get 3000-5000 grit? Doesn't matter anyway, find the highest you can. Don't do the whole job with 120 grit!
There's is no benefit going beyond 800, it'll just look pretty.


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.
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post #18 of 43
Theres your answer, why piss about spending hours lapping your cpu and heatsink (it's best to do both) in the hope, as it's not guaranteed, that you'll lower your temps significantly, when you can knock off a whole chunk by improving your cooling?

Anyway, isn't 80°C on load for an overclocked i7 normal? Just asking...
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post #19 of 43
Quote:
Originally Posted by AWESOME_3_SOME View Post
@purpleannex, cause i'm still getting 80 degrees after 30 minutes of prime95. even with the thermalright silver arrow i'm getting those temps, i guess after i lapped my cpu i'm going to get the Rasa RX240 Watercooling kit and get those temps i really want below 65 degrees after 8 hours of prime95
Sounds like something more wronger than "needing" to lap a cpu. Especially at those volts.
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post #20 of 43
Quote:
Originally Posted by BlackOmega View Post
There's is no benefit going beyond 800, it'll just look pretty.

If a jobs worth doing, it's worth doing right! LOL
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