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Should I Lap My CPU With This Sandpaper? - Page 2

post #11 of 18
To answer your question, the grit you have there would be sufficient for flattening the surface of the tuniq. If it's curved, it will impede heat transfer. You can try lapping it with what you have there and see if it makes a difference. It can't hurt, and if it does, you can fix it with some finer grit papers.
post #12 of 18
Quote:
Originally Posted by mrtn400 View Post
I have some 100 and 150 grit aluminum oxide sandpaper and I'm wondering if that is a fine enough grit to use on my Tuniq and not just wreck it.
It won't wreck it, but will create a rough surface and not good for perfect seating, u need a much finer grit like in a pro lapping kit.
post #13 of 18
Quote:
Originally Posted by mrtn400 View Post
I'm not worried about the fact that I have 38c temps, I'm worried that there's a 4c difference in temps (and it gets to be about 8c on load) and that is a product of bad contact (I've reseated about 4 times with different techniques each time).
The four degree discrepancy among your CPU's core temperatures is perfectly normal.

Mine currently read as such:

37, 37, 33, 32

...

Not much you can do to even things out.

Just about all quads see the same sort of discrepancy among cores.

Advice?

Don't lose sleep over it.


    
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post #14 of 18
Thread Starter 
Hmm, since it's a giant PITA to even just take off my Tuniq and put it back on, I'm going to pass.

If anything I need to do a vdroop mod to my IP35 Pro so that it doesn't take 1.5v idle (1.43 load) to get me to 3.4Ghz.

Thanks for your suggestions/help. +Rep time.
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post #15 of 18
Quote:
Originally Posted by mrtn400 View Post
It's about 26c. And once again this isn't a question about temps it's a question about lapping.
With that grain of sandpaper, it would only be good for making the surface of your Tuniq and/or CPU flat, but it would probably wear off a ****ton of the heatsink surface on either. I'd start at a grit of 800 and then work your way up to 1500-2000 for a smooth, polished surface.

As far as the differentiation in core temps go, that happens with most quad cores. As we speak, I'm idling at 36/37/33/38 @ 3.6GHz 1.44v with a 31c ambient. Quad cores will have differentiations in their core temps, but if you decide to lap your CPU, the differentiations will be reduced.
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post #16 of 18
For sandpaper I would recommend 400,600,800,1000,1500,2000 grit. It costs around $4 at my local wallmart and can do at least 4 lapping jobs with it. It took about about 45 mins to lap my true. I mark a X with a sharpie and do 15 to 20 strokes one way then switch sandpapers. My temps dropped around 2c at idle and 2c at load for lapping heatsink.

<A HREF="http://www.overclockersclub.com/guides/lapping//">Reference used to lap heatsink</A>
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post #17 of 18
Quote:
Originally Posted by s1rrah View Post
The four degree discrepancy among your CPU's core temperatures is perfectly normal.

Mine currently read as such:

37, 37, 33, 32

...

Not much you can do to even things out.

Just about all quads see the same sort of discrepancy among cores.

Advice?

Don't lose sleep over it.


yup u can't really do anything about gap.
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post #18 of 18
220-400-800 is perfect just use a piece of glass or something flat,shine or mirror finish isnt neccesary its mainly flatness your after its just less Tim yull need plus if you dont lap cpu and hsf its not really going to get you much,imo
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