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How much does lapping help? - Page 2

post #11 of 26
I cut my temps by 55c, its so cold i have to run me heater to keep warm.
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post #12 of 26
Pros:
Lower temps

Cons:
Lower resale value
Warranty voided
If you manage to screw up, you'll make it worse.
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post #13 of 26
Thread Starter 
Quote:
Originally Posted by jacksknight View Post
I cut my temps by 55c, its so cold i have to run me heater to keep warm.
Well that's all the proof I need. Your avatar persuaded me.
Edited by Philistine - 5/1/11 at 8:26pm
post #14 of 26
It helps some, but you have to use some glass and VERY high grit sandpaper. Like 600 or more.

Edit: I meant low grit, the very fine kind.
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post #15 of 26
Thread Starter 
Quote:
Originally Posted by dzalias View Post
Pros:
Lower temps
OK

Quote:
Originally Posted by dzalias View Post
Cons:
Lower resale value
Warranty voided
If you manage to screw up, you'll make it worse.
I don't usually resell my components. I repurpose them as needed.

Warranty? On a CPU? I've never had one fail on me in a decade. If I break it that's on me.

Worse temps? Only if seriously screw it up.

Let's say I'm set on lapping. I'm just wondering what differences I can expect.
post #16 of 26
It really depends on how concave the heatsink/ihs are to be honest.....i saw about a 3-4C drop when i lapped my Q6600 back in the day. It also evened out the temps between the cores quite a bit so it was worth it to me for about an hour or so worth of work.
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post #17 of 26
Quote:
Originally Posted by pyro_dude View Post
It helps some, but you have to use some glass and VERY high grit sandpaper. Like 600 or more.

Edit: I meant low grit, the very fine kind.
You had it right the 1st time. 400 grit is a good starting point for fast material removal if the heatsink or cpu is really bad. Gradually step it up to end with 2500-3000 dependent on how much of a mirrored finish you want.

Then take a buffing wheel, and....j/k about the buffer

Some say a highly polished finish is bad, that a little bit of fine scratches helps and stop with 2000 grit. No one has been able to show a solid difference between 2000-3000 grit as far as a repeatable temp variance that I've ever seen.
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post #18 of 26
Quote:
Originally Posted by pyro_dude View Post
It helps some, but you have to use some glass and VERY high grit sandpaper. Like 600 or more.

Edit: I meant low grit, the very fine kind.
I think you mean just the opposite of what you're saying. You'll want to actually start with about 800 grit and work your way to 1500-2000 grit.

Follow the following sandpaper chart:

800 grit
1000 grit
1500 grit
2000 grit

I used a wet/dry sandpaper and with the 2000 grit, one drop of water every 5 minutes (mainly to polish)

This will get you to a mirror finish, but make sure you're working on an absolutely flat surface

Typically, at least in my experiences (lapped 4 CPU's so far), I've seen up to 6ºC drop in temps. On average, about 5ºC, with no less than 3ºC difference.

There are alot of tutorials online about doing it, just do what feels right
Edited by rsfkevski - 5/1/11 at 9:15pm
post #19 of 26
How about we gather some information to see what the average temperature drop after lapping would be.
    
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post #20 of 26
Thread Starter 
In order to do that you would need to standardize the lapping procedure as differences in lapping could yield different results. But I'd be interested to see what results people who actually lapped really achieved.
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