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how flat is the h50? Should I lap it? - Page 4

post #31 of 36
It looks nice but I know nothing about lapping. Looking forward to seeing your temp decrease.

I guess well see what others have to say.

Edit: nvm, see you made a new thread.
Edited by 1keith1 - 12/30/10 at 5:22pm
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post #32 of 36
So it appears to me that lapping the Corsair H50 along with a new thermal compound does in fact reduce max load cpu temps on average from 4c-10c depending on conditions, is that right?
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post #33 of 36
Thread Starter 
Quote:
Originally Posted by xebian13b View Post
So it appears to me that lapping the Corsair H50 along with a new thermal compound does in fact reduce max load cpu temps on average from 4c-10c depending on conditions, is that right?
4-12c from what I have seen. Also it doesnt void warranty so no reason not to do it.
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post #34 of 36
Quote:
Originally Posted by AdvanSuper;11801243 
No, the lower grit does all the work and the higher grits provide a smooth, clean and even finish. The more flat and even the better the TIM will help thermal dissipation between the HSF and CPU. IIRC I used 800 1000 1200 and 2000 on mine. The lower grit does the most work to get the HSF flat and even then the higher grits refine the finish and evenness of the HSF

When you lapped your H50, did you use alcohol to clean things up afterwards and Arctic Silver 5?
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post #35 of 36
Wow, guys... I apologise in advance for this being the wrong place to troll, but this is a great example of an idea that is good in theory but not in practice. If flatness is your goal, and not smoothness, then you are only going to accomplish that if your chip and sink are lapped in a fixture. Lapping by hand will make your parts convex, for the same reason that the outer edges appear to be raised once you get started- you are buffing the edges down into a round shape. Now, by increasing smoothness- that is, polishing to a mirror, you are effectively reducing the amount of TIM required to fill the interface, and will see an improvement. But to say that flatness is being improved is just wrong. I quite literally count atoms for a living, so visualizing molecular interactions is my state of mind much of the time... and this is one place where the limitations of your equipment (that is, your sandpaper, table, and hands) reigns- this method is crude and imprecise, defeating the purpose to begin with. Rigid mechanical fixturing is the only way to get these puppies "flat". Now, as for your choice in cooling, the H50 is not a high performance system. Why ruin your chips with lapping for a marginal gain, when you can make a substantial gain by improving your water cooling? It's turd polishing- and I have never before been able to use that expression so literally!
Edited by ZeusBoltThrower - 1/5/11 at 6:02am
     
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post #36 of 36
Thread Starter 
Quote:
Originally Posted by ZeusBoltThrower View Post
Wow, guys... I apologise in advance for this being the wrong place to troll, but this is a great example of an idea that is good in theory but not in practice. If flatness is your goal, and not smoothness, then you are only going to accomplish that if your chip and sink are lapped in a fixture. Lapping by hand will make your parts convex, for the same reason that the outer edges appear to be raised once you get started- you are buffing the edges down into a round shape. Now, by increasing smoothness- that is, polishing to a mirror, you are effectively reducing the amount of TIM required to fill the interface, and will see an improvement. But to say that flatness is being improved is just wrong. I quite literally count atoms for a living, so visualizing molecular interactions is my state of mind much of the time... and this is one place where the limitations of your equipment (that is, your sandpaper, table, and hands) reigns- this method is crude and imprecise, defeating the purpose to begin with. Rigid mechanical fixturing is the only way to get these puppies "flat". Now, as for your choice in cooling, the H50 is not a high performance system. Why ruin your chips with lapping for a marginal gain, when you can make a substantial gain by improving your water cooling? It's turd polishing- and I have never before been able to use that expression so literally!
I am sorry but u made me LOL irl.
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