General Lapping Information - Overclock.net

onelivestarfish · 09-12-07

To everyone out there lapping:

I have lapped according to several methods suggested (wet/dry, decreasing grit size).

And have found out the following:

You don't have to spend hours upon hours of lapping with several increasing grades of paper.

The time it has taken me to lap a CPU heatsink to an almost mirror finish: 30 minutes. A CPU cooler heatsink: 45 mins.

And here is how:

First I take my heatsink (or CPU IHS) and mark it with a sharpie (making an X and then 2 circles in a bullseye formation, followed by marking the. Then I proceed to use a razor blade to determine how "uneven" the surface is, just to get an idea.

Then I begin lapping using 200grit paper. After I expose the copper uniformly on the heatsink, I use the razor to check how even the surface is. I mark the heatsink with a marker again and now use 400grit paper. I stop after about a minute to check the surface flatness using the razor. If it still is uneven, I will continue to lap until it is even. Once I have attained a flat finish, I immediately switch to 2000grit paper to remove the grooves created by the lower grit papers.

This is easier to perform on CPUs due to the pressure that can be applied, but I have lapped both my TR-120 extreme and CM Hyper TX in this method.

As for numbers, I am running my E6600 with 1.47v at 3.6ghz with a load temp of 58degC with the TR-120 extreme and my E6400 with 1.35v at 3.25ghz with the same load temp of 58degC. I used Shin Etsu as the TIM.

If you have any questions, let me know.

linskingdom · 09-12-07

Good idea. I will give a try this weekend. Rep+

onelivestarfish · 09-13-07

bump for a different way of lapping!~

bullcrew · 09-13-07

Did mine, looks great and dropped the degrees as well.

onelivestarfish · 09-19-07

Bump for a modified lapping method!!!

PR1M3R · 09-20-07

bump, this really works folks. I started doing it like this after my first 6 hour lap job. Never thought to post it though. REP+

archangelabove · 09-21-07

HEY.. I have some 220grit, 800grit and 2000 grit hanging out.. think I can replace the 400grit with the 800?

Syrillian · 09-21-07

Vive le difference!

Good call on the marking (sharpie) and "heavy scouring" (200 grit)

I have adopted the habit of using a stamp pad and ink as a gauge for leveling and flattening the surface off.

+

onelivestarfish · 09-21-07

the 800 will be fine as long as you make it as flat as possible using the 220.

Lelin · 09-27-07

Wooh, I'm currently at 3.2Ghz 1.3v 54C load on my e2180, just applied as5 so will probably be around 52C load. I have everything to clean my big typhoon now so it will be easier to go and lap it. Can I find those papers at like Home Depot?

+rep

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General Lapping Information

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