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Is lapping worth it? - Page 2

post #11 of 26
Yes, it is.

I lapped my Tuniq 120 to 2000 grit, and with my fan at 1900 RPM (80%) I reach a mere 45* C under full load in Orthos. This is with a decent ambient, not freezing. The lapping it self took off about 3-4* for me, but I have heard of people who got more.

I have a dtek fuzion and watercooling setup which I'm waiting to put on a new Intel system I will build when Nehalem comes out. I already lapped it.
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post #12 of 26
I lapped my TRUE the other week, i went 600, 800, 1500, 2000. It has a shiny mirror finish, but overall, my temps hardly changed .
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post #13 of 26
Thread Starter 
Quote:
Originally Posted by -said- View Post


Maybe this will help you.
Your link does not work
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post #14 of 26
The Materials:

A firm steady grip, a flat surface and 200, 400, 600, 800, 1500 grit papers (higher # = finer BTW) are all you really need for a perfect lapping job... 2000 is just for a perfect mirror finish and gives no temp decreases whatsoever...

200, 400 and 600 can be found at just about ANY hardware store since they're intended for normal home renovation (used for wood)

800, 1000, 1500, and 2000 are very fine and specially made for metal polishing (usually for car painting) so you'll need to hit up an auto parts or auto body shop for these grits

A good lapping "kit" (200, 400, 600, 800, 1500 grits) usable for 15ish separate jobs probably shouldn't cost you more than $16ish..... As for the flat surface, you can use the glass covering off of any picture frame (so that part is free)

Going out and buying these yourself is a lot better of a deal than those single use lapping kits found online that go for $15-20

The Technique:


Tape the glass to a hard surface and tape the sand paper to the glass... I prefer dry sanding - use a brush on occasion to wipe away the metal dust... some swear by wet sanding, but I personally think it's more hassle than needed... keep the thing you're lapping flat against the paper at ALL times... DON'T let it buckle at the end of your pushes and pulls... rotate the object you're lapping every now and then to ensure a flat surface

With a CPU, what you want to do is lap with 200grit until the copper is exposed uniformly on the chip... at this point, you want to take a sharpie and swiggle lines all across the IHS... give it a second to dry then give it about 2-3 strokes on the paper - if the IHS is flat, the entire surface would have made full contact with the sandpaper and taken the sharpie marks off on every portion of the chip... you can then move on to your higher grit papers, doing the sharpie test on occasion to ensure that you are still keeping the chip flat

Same thing basically goes for the heatsink

Result:

Varies... but about 5-7C is what I generally notice if properly done... Especially important with the TRUE since they're known to have uneven bases

Quote:
Originally Posted by Flying_Fish View Post
I lapped my TRUE the other week, i went 600, 800, 1500, 2000. It has a shiny mirror finish, but overall, my temps hardly changed .
That would be for two reasons:
1) You went straight for the higher grit papers... the lower grit is where the action is at - that's where you take off the most copper - that's where you get the flat surface.... higher grits are mostly for shine and the point to lapping is FLATNESS not SHINY-NESS
2) You only lapped your heatsink... the point to lapping is to get TWO surfaces that are very flat and make perfect contact... 2 paired uneven surfaces are going to make about as much contact as an even surface paired with an uneven one

Any further questions, feel free to ask
Edited by killa_concept - 5/26/08 at 4:21am
post #15 of 26
Isn´t it allowed to post Links to other sides?
After posting it works and now it looks like http://forum.****************/showthread.php?t=4735.

What ever...google for "lapping cpu" an you´ll find some good tuts.
post #16 of 26
im lost here lol
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post #17 of 26
Take a peek at this thread! It's the thread I used to lap my TRUE and I didn't have any worries at all. There's lots of nice pictures to help explain even more and there's tons of great info. It's a great read for those that have never lapped and are insterested.
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post #18 of 26
thanks
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post #19 of 26
I really didn't notice how much my temp dropped when I lapped my quad because I changed a couple of things up at the same time. I put on a different fan and I also did the washer thing on the true. How ever, under load all 4 cores read the same temp now. Before 2 cores would be higher than the other 2 cores and 1 core would sometimes be higher than the rest. Just based on that alone I think it was worth it.
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post #20 of 26
Thread Starter 
thanks for the in depth tutorial i am going to follow your steps. on the way to an auto store right now to buy all the sand paper! i will post pictures once I am finsihed showing results. +rep for making such an indepth tutorial for me!
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