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Lapping H70

post #1 of 9
Thread Starter 
Ok, so I'm gonna lap my H70 because I was replacing the thermal paste on it and relized there is a bunch of big scratches on it. But I only have 400,800 and 1000 grit sandpaper, will that be good enough? Or should I go out and get some 600 and 2000 grit also?
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post #2 of 9
your local auto store should have 2000grit and yes i would suggest it.
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post #3 of 9
I wouldn't waste your time unless you're going to lap your processor as well. I would suggest both 1500 and 2000 grit, though 2000 grit is more just for looks at that point.
    
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post #4 of 9
I usually start with 600 then 800 then 1000 then 1500.. If you want a mirror mirror finish go 2000 then 3000 then top off with a buff using a towel and some auto paint super fine swirl remover..


EDIT^
Quote:
Originally Posted by cmeeks View Post
I wouldn't waste your time unless you're going to lap your processor as well. I would suggest both 1500 and 2000 grit, though 2000 grit is more just for looks at that point.
This if you do one you will not see a big difference unless you do the other.. The CPU IHS is typically more concave then a HS is as well..

And lastly unless you pull the h70 (hoses from block/pump assembly)apart its gonna be a task lapping it correctly... Which in turn means draining, flushing, refilling and adding a Res/t-line of some sort...
Edited by G.E.Nauticus - 1/14/11 at 3:01pm
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post #5 of 9
Thread Starter 
I was thinking about lapping my processor also. Well I guess I'll go pick up some 600, 1500 and 2000 grit tomorrow and then just do 600, 800, 1000, 1500 then 2000. The temps on my H70 sit around 33 idle then jump to like 62 load. Which I don't like at all, so I'm hoping this will lower my load temps a bit.
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post #6 of 9
Quote:
Originally Posted by lethal buttcrack View Post
I was thinking about lapping my processor also. Well I guess I'll go pick up some 600, 1500 and 2000 grit tomorrow and then just do 600, 800, 1000, 1500 then 2000. The temps on my H70 sit around 33 idle then jump to like 62 load. Which I don't like at all, so I'm hoping this will lower my load temps a bit.
I like to start with 600 because 400 just takes off too much on a cpu... Its a super thin piece of copper as it is I always take it slow to avoid going through the ihs and killing the cpu...


62c is way too high, something isn't right there... Want TIM are you using? Going from 33c idle to 62c load is not right...
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post #7 of 9
Quote:
Originally Posted by cmeeks View Post
I wouldn't waste your time unless you're going to lap your processor as well. I would suggest both 1500 and 2000 grit, though 2000 grit is more just for looks at that point.

I'mma let you finish, but.


Quote:
Originally Posted by ArcticZero View Post
So I lapped my H50 last night. Here's some pics of the process:

From the moment I checked the base with a metal ruler and began lapping, it was pretty obvious the base was pretty concave. If I would stick the CPU to the base manually, the suction was pretty good. However once mounted on the mobo, it's like they barely stuck to each other at all.

This is after a few rotations at 800 grit. The X hasn't faded at all in the center.


After 800 grit


After 1200 grit


After 1500 grit



If I had some 2000 grit paper handy, then I could've gotten a better finish. But it's flat as can be now, which is what matters anyway.


Check how the TIM was spreading before I lapped it.


Just some pics of the mess



I also switched to using the LGA775 mounting holes as an experiment to see whether it would give me better pressure than the LGA1366 holes.

And now for temps!

Before: 52-56c idle, 80-85c load
Now: 44-50c idle, 74-77c load

If those seem high to you, it's because my ambients never go below 30c where I live. But that's good enough for me considering where I was before.
Here's what a friend did to his H50 without lapping his proc and yielded results.
post #8 of 9
LOL, his h50 was a wreck.... From start to finish it looks like he took at least a mm off of that hs.... Thats insane....
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post #9 of 9
Thread Starter 
Quote:
Originally Posted by G.E.Nauticus View Post
I like to start with 600 because 400 just takes off too much on a cpu... Its a super thin piece of copper as it is I always take it slow to avoid going through the ihs and killing the cpu...


62c is way too high, something isn't right there... Want TIM are you using? Going from 33c idle to 62c load is not right...
I'm using arctic silver 5. Yeah I thought 62c was way too high also.
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