CPU Lapping... sometimes it is necessary [Archive]

View Full Version : CPU Lapping... sometimes it is necessary

Richf

10-21-2006, 10:16 PM

I posted this over on another site and thought some would like a reminder here.

I decided to bite the bullet today and lap my e6300. I have it running at 3.2ghz and was running temps of 64c on TAT. I wasn't overly worried because Orthos mix seems to emulate more real world processor excersise and temps were 60-61c after 10+ hours.

I had some 320 and 600 grit here and purchased some 800 and 1000. After 5 minutes using the 320 on a glass shelf I had, I was seeing a SEVERE convex of the IHS. 10 minutes into it and I had only created a small 1/2" circle of copper in the center of the core.

Long story short, it took me 45 minutes of lapping to finally get an all copper surface (I was wondering if I was going to hit the core itself at one point) on my CPU. After some lapping of my Freezer 7 Pro, I put everything back together.

The result... at the same settings I dropped 7c overall! Some might not think that's a lot but going from 64c to 57c is a big drop in heat. Once the AS5 settles in I shold shed a couple more degrees too.

Pardon the first couple of pics... I didn't realize my wife had changed the camera settings. These were taken approx. every 5 minutes. The final pic was after some 800 and 1000 grit but not the final outcome.

http://www.richardf.com/pics/e6300_lap/lap_05.JPG
http://www.richardf.com/pics/e6300_lap/lap_10.JPG
http://www.richardf.com/pics/e6300_lap/lap_15.JPG
http://www.richardf.com/pics/e6300_lap/lap_20.JPG
http://www.richardf.com/pics/e6300_lap/lap_25.JPG
http://www.richardf.com/pics/e6300_lap/lap_30.JPG
http://www.richardf.com/pics/e6300_lap/lap_35.JPG
http://www.richardf.com/pics/e6300_lap/lap_40.JPG

ANP !!!

10-21-2006, 10:25 PM

Niceeeee Work.

Cupcake

10-21-2006, 10:29 PM

dosent look like you finished

either that or it is just a bad picture

and wouldnt it have been alot easier to just remove the IHS

Sneil

10-21-2006, 10:56 PM

menlatin

10-21-2006, 11:08 PM

lapping is not that hard. Took me about 30 mins to do mine. But if you want to remove the IHS, refer to this thread.

http://xtremesystems.org/forums/showthread.php?t=116246&

Sneil

10-21-2006, 11:11 PM

lapping is not that hard. Took me about 30 mins to do mine. But if you want to remove the IHS, refer to this thread.

http://xtremesystems.org/forums/showthread.php?t=116246&
hmm, guess it worked for some. Im personally not brave enough to try that, but that's just me.

EDIT: From the guy who wrote the IHS removal guide in menlatin's thread:

ive removed IHS's a few times (2 successful, 3 unsuccessful)

Richf

10-22-2006, 07:08 AM

Yea, there is NO WAY I'd try to remove the IHS. A few days ago I read the thread Sneil posted and another where the guy broke his and knew at that moment I didn't have $200 to toss in the can. :)

Besides, what could I gain by being so foolish, a drop of 1 or 2 degrees?

As gentleman Sneil also pointed out, I said that the last picture was not the final outcome. I had continued with the 1000 grit but the last picture I took did not come out so I left it out. If I knew do to this much wouldn't it stand to reason I knew how to finish the job? :)

Richf

10-22-2006, 07:15 AM

lapping is not that hard. Took me about 30 mins to do mine. But if you want to remove the IHS, refer to this thread.

http://xtremesystems.org/forums/showthread.php?t=116246&

Hmmmm.... "For those who haven't read yet, i think my e6400 is half dead. IT seems that when windows see's both cores, (or windows installation) it blue screens, but if botting to an existing single core installation, it boots once, then after windows "installs" the second core and reboots, it blue screens all over again."

Eagle26

10-25-2006, 02:49 PM

Hmmmm.... "For those who haven't read yet, i think my e6400 is half dead. IT seems that when windows see's both cores, (or windows installation) it blue screens, but if botting to an existing single core installation, it boots once, then after windows "installs" the second core and reboots, it blue screens all over again."

:banana::banana::banana::banana:ty man thats why I aint gonna lap.. risky business

dab420

10-25-2006, 02:56 PM

:banana::banana::banana::banana:ty man thats why I aint gonna lap.. risky business

That was the result of an attempted IHS removal, not from lapping.

Lapping is relatively harmless if done properly.

xpsentity

10-25-2006, 03:16 PM

Dunno, FCG offers IHS removal service here - he's quite good at it, and afaik, no problems reported. But anyway, back on topic..

Soapy bubbles? I've never used any liquid to lap anything, never seemed a wise idea. Nice temp drop anyway.

Shpoon

10-25-2006, 03:20 PM

I've never used any liquid to lap anything, never seemed a wise idea

You should...most commercial sandpaper is wet/dry sandpaper, and does A LOT better with water acting as a lubricant, as well as the water moves the copper away.

WeStSiDePLaYa

10-25-2006, 03:26 PM

HELL NO! Do not attempt to remove the IHS on your core 2 duo!!! I'll show you why in a sec...

Alright read this (http://www.vr-zone.com/index.php?i=3878) entire "guide" and tell me you still want to try this on your core 2 duo:slapass:

If you still want to try you go right ahead.:am:

I had no idea these IHSs could be so convexed! very good to know..

that guy is a jacka55 and must not know a damn thing about soldering.

he warmed it up slowly, allowing the componets to heat up, which is why the core came off, you want to heat it up very quickly, and cool it down relatively quickly, just like with soldering, if you keep the heat on the thing to be solderied for too long, the heat will spread and damage it.

pH(x)

10-25-2006, 04:51 PM

that guy is a jacka55 and must not know a damn thing about soldering.

he warmed it up slowly, allowing the componets to heat up, which is why the core came off, you want to heat it up very quickly, and cool it down relatively quickly, just like with soldering, if you keep the heat on the thing to be solderied for too long, the heat will spread and damage it.
So I assume a propane blowtorch will be best suited? At nearly 5,500F it's quite superior to a hot-air gun. But the link from VR-Zone provided has seriously made my reconsider removing the IHS from my 805 Smithfield. I had planned to do it quite soon -- but now ... never!!! :eek:

Thanks again for the link! :fact:

WeStSiDePLaYa

10-25-2006, 06:03 PM

So I assume a propane blowtorch will be best suited? At nearly 5,500F it's quite superior to a hot-air gun. But the link from VR-Zone provided has seriously made my reconsider removing the IHS from my 805 Smithfield. I had planned to do it quite soon -- but now ... never!!! :eek:

Thanks again for the link! :fact:

if you look how FCG does it, he uses a blowtorch. because then the solder will melt almost instantly without heating the rest of the chip much.