How much gain is expected from a Lapped CPU IHS?

After reading some guides, I've decided to give it a go to see if I can lower my temps a bit by lapping my IHS. I've lapped my i7 920 and only notice about 3-4 degrees difference. I haven't lapped my Heatsink yet but how much gains should I expect from the lapped CPU and would it be okay to re-lap it?
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More about gain expected lapped
  1. I'm guessing another 2-3 degrees C from lapping your IHS. The i7 920, I wouldn't suggest lapping it again, but maybe give it another 5 minutes with the 2000 grit.
  2. Thanks.. but I guess I won't be able to see the big gains until I do my heatsink as well. Having one object flat while the other protrudes or concaves won't do much. Kinda like putting a ball on a flat table.
  3. I have lapped a cpu and a cpu heatsink. The temperature difference was just a little less than 2C. The results were similar what others have been reporting. The drop in temperature is insignifcant for the typical user or gamer. The only reason I did it was to see if I could do it.
  4. Quick question, my CPU's corners descends downwards, should I lap until it's leveled?
  5. @ Oatmealz

    Depends on how far down to make it level. If the corner is decended, then chances are the whole chip may be at a slant. If so, then i would lap down to it. If it is just the very corner, then it probably wont be worth it depending on how far down you would need to go to make it level.
  6. No. That would probably be too much.

    Take a look at the photos and explation in the lapping guide sticky at the top of this forum section:
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