Need good CPU lapping Guides

[Ragenrok]

Ok, well I recently switche dover to Watercooling and haven't been recieveing the temps I should.

When I took off my block I descovered a 1/4" sized circle of TIM on the very center of my CPU still untouched by the heatsink so Put on a different heatsink and exact same thing so now I know that my CPU is concaved in the center.

I need some good lapping guides so I can try and fix it as best as I can.

 

[BillParrish]

Good Lapping Guide version 1.0

Go to lowes, Home Depot etc.

1) Get a pane of regular window pane (float) glass at least 6 x 6 inches and no bigger than 10 x 10. Do not drop it, handle carefully because if it breaks it can cut the crap out of you. However do not be afraid of your glass, it is your very flat and uniform friend.

1a) -OR- Steal a piece of glass from a picture frame, plastic is NO GOOD, be very careful not to let any women in the area catch you, after project is done, clean carefully and replace or its your ass.


2) Get a couple of sheets of wet and dry 400 grit sandpaper and 800 grit. (also see item 10a below)

2a) Stop by a drugstore and get a bottle of 90% isopropyl (rubbing) l alcohol. Make sure it contains no oils, just alcohol and water.

3) Go home. (if over 21 stop and grab a six pack on the way) If under 21 you can give it a try if you want but its your ass.

4) rip out your cpu and or heatsink or waterblock.

5) If there is no radio or small tv in your kitchen, consider placeing one in the kitchen during this project as it is boring as hell. The six pack helps.

6) take everything to kitchen sink.

7) adjust a trickle of water to a nice warm temp, not to hot, not too cold. If necessary after testing water temp with hand, go take a wizz and then return to kitchen sink.

8) place 400 sandpaper with the grit side up on the glass, fold over any unused parts around to the back of the glass, or cut/tear the paper ot fit better but it helps to hold/grip the glass with some of the sandpaper "wrapped" around the backside.

9) hold the sandpaper/glass so that the trickle of water hits it and slowly washes across the paper, you do not need a flood.

10) lay the item to be lapped onto the sandpaper and gently rub back and forth or in a circular motion. This is a matter of debate, it really does not matter. I find back and forth lets the imperfections show up better. (If needed consult an adult female on the relative merits of back and forth vs circular rubbing, it your ass. ) Let the sandpaper do the work, lift the item off the sandpaper evey now and then to let the water completly flush away deposits and inspect the item. When the base of the item is completely uniform and you can see no places "unscratched", you are done. This can take a while. Have a beer. Repeat items 8 9 10 with the 800 grit.

10a) If you want to be anal about it get a sheet 1000 grit or 1200 grit and repeat.

11) clean base of item with coffee filter and alcohol, do not touch it again, ever.

11a) If shiney things make you happy, a dab of polish on a coffee filter (Brasso etc) and you can make it look like a mirror. No one but you will ever see this, so if you do it, enjoy the moment. Have another beer and admire the uberness of your shine. Another fun thing is to take 28 pics of your uber shine job and further clog the internet with useless redundant shiney heatsink/waterblock pictures. Be sure to put the camera on "highest resolution" and do not crop the images, post full size. For example: http://www.overclock.net/amd-air-cooling/136140-adventures-lapping.html (minus 10 points because we cannot read the date on the coin in the mirror finish). Have a beer.

11b) repeat step 11

12) Its so simple a Caveman can do it, do any other components and take a nap to sleep off the beer. Only then reassemble the computer.


13) However the inability to come up with /www.google.com "cpu lapping guide" worries me greatly.