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post #1 of 68
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Well I did some searching and I couldn't find any threads dedicated to showing off lap jobs and I figure I would start one. If mods want to make this official I can spend time to over see it. I'll start by posting mine which I just got done with.

Grits: 500-800-1000-1500-2000 (no polish used)...

(Yeah we had some sunday comics laying around)

CPU



Heatsink


post #2 of 68
I think we should have results as well.
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post #3 of 68
Thread Starter 
Quote:
Originally Posted by lukey_h View Post
I think we should have results as well.
Working on putting the rig back together. Thats a good idea, with every lapping pic you post you should post before and after temps and any trouble you had or any suggestions for other people who are thinking about lapping.
post #4 of 68
That's unbelievably smooth... wow... Seems like TIM would do more harm than good at that point...


Here's my question though: Yes, it's ridiculously smooth, but how do you know you've made it flat? It can be crazy smooth, but be lapped at a slight angle. How do you guys make sure that you've kept the surface as true as possible? I know people usually lap on a piece of glass, but how do you make sure you've applied even pressure?
Finally an update
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post #5 of 68
Quote:
Originally Posted by AyeYo View Post
That's unbelievably smooth... wow...


Here's my question though: Yes, it's ridiculously smooth, but how do you know you made it flat? It can be crazy smooth, but be lapped at a slight angle. How do you guys make sure that you've kept the surface as true as possible? I know people usually lap on a piece of glass, but how do you make sure you've applied even pressure?
That's why you keep rotating the CPU/heatsink when you lap it. It will even itself out.
post #6 of 68
Heres one from back in the day! No polishing or mirror finish :-( But it was damn flat!

I beleive I went upto 1200 grit.

TRUE:



Q6700:

TJ07 Type R Build
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TJ07 Type R Build
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post #7 of 68
Thread Starter 
Quote:
Originally Posted by AyeYo View Post
That's unbelievably smooth... wow... Seems like TIM would do more harm than good at that point...


Here's my question though: Yes, it's ridiculously smooth, but how do you know you've made it flat? It can be crazy smooth, but be lapped at a slight angle. How do you guys make sure that you've kept the surface as true as possible? I know people usually lap on a piece of glass, but how do you make sure you've applied even pressure?
Thanks. Using glass is the best method and also it's more important during the thicker grits to watch what youre doing and of course what hickeydog said is to keeping rotating. The method I like is to go straight up and down and count one every time I'm back at my original starting point. I'll do this 30 times (or 60 if you count every stroke) and then rotate 90 degree's and repeat. I then do about 20 full rotations for each grit. It sounds like working out and believe me, its a workout. Make sure you're in front of a tv and have some cold beverages by your side because it will get boring pretty fast.

It took 7 hours to get my cpu the way I was happy with it. When you look at it in the light and tilt it you still see scratches they are just really fine and theres also microscopic ones there I know I can't see so TIM is still very much useful. To be honest I wasnt planning on lapping my cpu but when I took off the heatsink there were two nics in both the surface of the heatsink and the surface of the cpu which I have no idea how they got there. Something about sanding and voiding a warranty on a $200 cpu makes me cringe.

Great shots rocker. Looks really good, 1200 is really all you need to go up to after that it's just for looks and when its all put together no one will see it anyway.
post #8 of 68
Summer is rolling in and its becoming harder and harder to run 4.2ghz under that 80c threshhold.. Reapplied thermal paste to be sure last night and it only made a 5c difference at best.

Its either lapping or going with a good loop... What kind of temp differences are you guys seeing from unlapped?
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post #9 of 68
Thread Starter 
Quote:
Originally Posted by Skillzero View Post
Summer is rolling in and its becoming harder and harder to run 4.2ghz under that 80c threshhold.. Reapplied thermal paste to be sure last night and it only made a 5c difference at best.

Its either lapping or going with a good loop... What kind of temp differences are you guys seeing from unlapped?
Well I just got my rig back together and it my idle before was 35c now it's at 32c. My load temps are decent. Before they were about 48c and now they are 41c max. I still need to do some more testing/benching to really put this to the test. Ambient is the same, 19.2c. cpu OC is a modest 3.6 at stock volts and the TIM was just applied so I don't know if the temps will get any lower when it "breaks in" I never fully believed the break in period for TIM.

Edit: wanted to add, cool n quiet is turned off and so is smart fan control for cpu
Edited by thx1138 - 4/2/10 at 7:11pm
post #10 of 68

E2180...i forget what grits i used, it was a while back
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