Conroe X6800 Lapping - Complete's Guide

[Complete]

So the story starts here.

This will be my first major guide. I hope people get some helpful stuff out of it.

This guide will describe the steps I took to lap my Conroe x6800. It took me about 1 hour to do, and I took my time.

Stuff needed..

1.) Nice size piece of glass
2.) paper towels
3.) Rubbing Alcohol
4.) Sanding paper
5.) Alittle work from your elbows
6.) Perm. marker

Results I saw:

A drop in 5 degress idle temp, and 10 in load temp!!! (Dual Orthos)

x6800 @ 420x10 /w 1.575 volts

Before Lap:

55 - 58 Idle
65 - 68 Load

After Lap:

48 - 50 Idle
55-58 Load

WTF!!!!


SO LETS BEGIN!

The sandpaper used on this lapping went as follows:

I went to my local AUTOZONE!! Picked up packages of 400, 600, 800, 1000, 1500 grit sandpaper. The packages come with 5 sheets, and are priced at 2.50 USD.



Picture of my poor sick concave CPU



Next. I took a marker and drew marks on the cpu. I got this idea from another thread. Its wasn't mine. I take no credit. All this does it for you to see.. well.. HOW BAD it really was.


Now. What you will need to do next. IS locate the little black cover that came with the CPU. Place it on the back if you havent done so. Its a nice Protective sheet to save your ass if you drop it and bust a cap... no pun intended.

I also took a silver sharpy marker and labled my corners... so when I start lapping, and i go get a beer, or space out... I know which way I was sanding..



Now.. start sanding by wiping the glass down good with paper towel, put the 400 sand paper on the glass, and turn the CPU over, and start sanding in a vertical, down / up fashion..

Many people Lap by using circles.. I dont like the idea...

Now as you are going, keep rotating the CPU in your hand.. So just keep turning the CPU so you dont grind one side down more than another. But keep going up and down.

After a few minutes.. you will get this!



Keep moving up in grit sand paper, I got to this point on 600.. posted below..



Just keep going, and Moving up in the grit, you will start getting to this point.



CONGRATS! you have gotten all the stupid Nickel off the processor! Now listen up!! At this point.. you will ONLY rotate the processor in 180 degree fashions..

We need to stop using a cris-cross method. It will turn the finish yucky if you dont.. So start sanding with anything above 800 in a vertical , up and down fashion, but do not cross sand..

Use all the way until 1500 grit..

When you get to 1500 grit, I started to press VERY VERY lightly on the cpu. I wanted to make sure the 1500 grit did its job in getting all the microscopic tunnels and scratches..

After this point I stopped. AutoZone does carry 2000 grit, but they were out :S.. But jinu117 is shipping my SS phase today. So I will throw 2000 grit when I recieve that.

Here is the final shot!!! SOO pretty!! Anyways, if you want a better finish, grab some 2000 grit.




AS ALWAYS!! if there is anything I should add, change, or modify in this guide. Please post. If you need help, and or such, feel free to P.M. me.

And no I will not give you my cell phone number!