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Is lapping still needed with a 2600K and H70? - Page 2

post #11 of 16
Well, if it was me I would lap them, but it's up to you.
    
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post #12 of 16
I lapped my old phenom 945 and it did not do enough to bother. I got a 3 deg drop on load. I ended up putting it in a rig I sold to some family members and it ran at normal temps with the stock cooler after. I did not bother lapping my 1055t because 50 deg at full load is good enough for me.
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post #13 of 16
I have the i7-2600k and the H70. I am going to lap my h70 but not the CPU. I did my test on the IHS and it was just about perfect. However the H70 is a very grainy surface. I am starting with 1800 grit and then 2000 then 2500. I wont polish it but I want the grooves out. The less TIM the better!

So if you have a new i7-2???? I would not lap it unless you know your IHS is not on par. But thats just me.
Edited by Joshwaa - 1/25/11 at 11:37am
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post #14 of 16
Quote:
Originally Posted by bl1nk View Post
Lapping was never really needed and I doubt it will show you any better temperatures. I'd suggest against it. In some cases it worsens temps and it voids your warranty.
Wait what?!?!?! You can't be serious. If lapping worsened your temps then you did something seriously wrong. Lapping will always improve heat transfer.
Quote:
Originally Posted by svntwoo View Post
i have been thinking about lapping... the concept in general..
I think the reason people see a little better heat transfer is because they are actually removing material from the IHS.... Thus less material to hold heat in the IHS...

I suppose better contact may in fact be true as well.
While exposing the copper from underneath the zinc definitely does help, it's more about making both mating surfaces perfectly flat; or as close as you can get to perfect. More contact between the surfaces = more heat transfer as there is a larger area that can dissipate it.

FWIW, I have lapped a few CPUs' in my time and I have always seen a considerable temp decrease.

With my x3 720, after lapping, it idled AT ambient temp, and loaded ~39C. And that was with an 800MHz OC.

Or after lapping my Thermaltake big Typhoon, it actually cools better than my Xigmatek Dark knight (with the same fan). However, that cooler needed to be lapped right out of the box. The base was so rough you could file your nails with it, not to mention, it was concave as well.

At any rate, lapping works --if you do it right.

NOTE: After lapping less TIM is required.
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post #15 of 16
Quote:
Originally Posted by tconroy135 View Post
The problem with lapping is 1-2c is never going to make or break your overclock, so this warranty voiding behavior is unwarranted.
    
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post #16 of 16
I lapped my i7-965 because of the high TDP. I definitely lowered idle/load temps by 4-6c. I may even do it with the 980x, but i'm not sure yet.

In any case, something with low TDP like Sandybridge would probably see a VERY miniscule gain at best. Your heatsink surface being lapped would probably have more of a difference than lapping the die itself.
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