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To lap or not to lap?

post #1 of 8
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Im about to build a new rig based off of a q8400 and over clock the bagbus out of it. but i want to know, is lapping it worth it or not? normally i would think it would be worth it but in this set up i am going to push this cpu until it pops.
the cooling will be a modded h50, with the rad next to a all ways running window ac unit. should be a lot of fun.
so to lap or not to lap?
    
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post #2 of 8
if you have the time and patience, why not. you're gonna oc it til it pops anyway.
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post #3 of 8
To be honest, lapping will give you maybe a 1C difference if that. It's more of a 'oo ahhh' thing than a performance thing.
post #4 of 8
Quote:
Originally Posted by mbudden View Post
To be honest, lapping will give you maybe a 1C difference if that. It's more of a 'oo ahhh' thing than a performance thing.
Agree 100%. I feel as if I wasted my time doing it. Zero difference for me, and both the waterblock and IHS were far from flat... This is with shin-itsu TIM (aka the best IMO), so results may vary more if using a cheaper TIM that is loss tolerant of surface irregularity.
    
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post #5 of 8
It really depends my cpu waset real flat but i didnt realy gain much in temps.
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post #6 of 8
It depends on how flat your CPU/cooler is, what sort of contact you are getting, and where the weak link in your cooling setup is.

My CPU and waterblock are lapped (to 1000 grit, any more is wasteful cosmetics), and this did a great deal to even out the temps I was getting. Both surfaces were convex before, so my middle two cores where running almost 15C cooler than the outermost cores. Lapping worsened the temp on the middle cores a few C, but improved the other core's temps dramatically.
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post #7 of 8
If your going to OC till it drops you might just do it to say you have experience lapping, personally I dont care to lap my main machine but I have lapped a couple of my tinker rigs. I would not bring sand paper or water within 3 feet of my i7.
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post #8 of 8
Unless lapping is performed in a mechanical fixture, it's not true to its purpose. Pun intended. For a crowd that thrills off of minutia, I am consistently surprised at how many people dare to lap a pair of plates by hand without considering how the process leaves a generally convex surface. Ever how small, it defeats the process if minimizing TIM is the goal.
     
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