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is lapping worth the trouble

post #1 of 7
Thread Starter 
Ok so I know lapping is nothing new but for me it has yielded great results, so I thought I`d share them with you all.

Motherboard: P5B Deluxe WiFi.
CPU: E6600 rev.B2.
Cooler: Arctic cooling freezer pro 7


I've always been a little disappointed with this chip, I`ve had it for a couple of years now and the wild overclocks and cool running temps i'd often heard people talk of just never happened for me. even with a mild overclock my CPU temps would always be too high for 24/7 use
average overclocked temps were always in the 60's under load, and around 50c+ idling.

I decided it was time to take of the heat sink and lap it, as well as the processor.
I think most of us know the idea behind lapping but for anyone unsure O-Jay from ccl forums has done a great guide to Lapping here.

Anyway on with the show.
As you can see from the first couple of pics I used wet and dry taped to a wooden board to ruff up the surface so I could see where the problem was.
immediately it was apparent that the chip was in fact quite badly concave.



I carried on lapping down through the various grades of wet'n'dry (used dry) from 400-800-1200
then went over again with the 1200 and just a tiny bit of water. I then did the same with the heatsink.
Incidentally the heatsink was an arse, due to its size and shape it was very hard to keep it flat while sanding. with a bit of perseverance though I got it some where close to the CPU although it doesn't show so well in the pic.









Next Up Results
Edited by urbtree - 5/19/08 at 6:02am
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post #2 of 7
Thread Starter 
As i said my temps were never very good even at stock before lapping but as you an see from these grabs my temps dropped dramaticly

IDLE





FULL LOAD




Its hard to argue with these figures really delineative proof that lapping an E6600 is worth it.
Not only did it drop temps across the board by as much as 10 degrees in some cases, but it also brought both core temps to the same level where as before there was on average 5c difference between core 1&2.

by far the best result is i am now running my pc overclocked to 3Ghz and still temps stay in the low 50c @ Full Load

I intend to redo a few of these tests with arctic silver 5 in a few days to see if that yields any more of a drop over the ****ty akasa puc world rubbish i have on at the moment




Next job was to crank up the juice to see what effect lapping had on overclocking.
Again most people should understand this but for those who dont, take a look at
Elsparrow of ccl forums Core 2 overclocking help a great guide, especially when you consider that the guy doesnt even own one. (having said that if you need to read this you probably shouldn't be lapping) or for a bit more in depth try our very own Noafinitys guid here
.
Ok so into the BIOS I went an set the FSB to 1333=333mhz effective.
I increased the V-core voltage to 1.31 (1.28 after V-droop) and booted into windows @ 3Ghz.

My temps were now cooler @ 3ghz than they were @ stock (2.4) before lapping.
With a bit of fiddling I managed to boot and be stable @ 3.4Ghz before temps got a bit too heavy. 3.6 was stable
but my ram was very unhappy and at load my CPU was a little too toasty @ 65c

In the end i settled on 3ghz as a nice round number and ran some tests with orthos and memtest
the results speak for themselves really





I think thats pretty impressive gain for a total cost of £1.99 and an hours work.
i still have loads of head room for more overclocking but i am quite happy to run 24/7 at these temps especially as my temps go down to about 32-33c idle
(which my pc is at 99% of its life) when speed step is enabled and i haven't even tried reducing the v-core yet.

you cant argue with that really can you so get lapping
Edited by urbtree - 5/19/08 at 6:10am
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post #3 of 7
I think you will get even better results if you turn the HS around. Push / Pull hot air out the back. Or are you doing a Pull / Pull? Does the HS fan get in the way of the ram? You can use the HS fan as a pull if you reverse the polarity of the 12v and GND. Other than that it looks like you did a nice job. My CPU and HS are both lapped also. My temps are right around 60c under full load.
Edited by AMD2600 - 5/19/08 at 6:41am
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post #4 of 7
Thread Starter 
the fan in the first pic was set up push/ push cold air in from the rear of the case blowing air over the ram.
i`v now turned the fans around so its blowing air out of the rear of the case exhaust.
its all gravy though as i`m currently building a water cooling loop to fill the case
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post #5 of 7
one thing I dont get.. your pics are all messed up.. different speeds??


the first pic has an OC of almost 200mhz, the second pic is stock at 2.4.. that could in itself be a reason for lower temps.

then you are running at 1600mhz, and 1680

disable speedstep and try again, you might notice more reliable results
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post #6 of 7
I think I'm going to practice this on an old pentinum chip...see how that goes..then maybe i'll try on my q
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post #7 of 7
different speeds for fans?
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