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Lapping Help

post #1 of 17
Thread Starter 
Here's a question for all you pro lappers: when do you switch grits? How do you know?

I just did my first lap on my Q6600 today spent about an hour and half and my temps went up about 4 degrees.

I used weird grits though, and I guess I didn't do enough. I will have to do it over. I bought 60 grit, 100 grit and 220 grit. (it was alll canadian tire had --- not like 400, 800, `1200 etc)...

How did you know when to change grits?

I used this guide: http://www.overclock.net/other-cooli...-heatsink.html

but obviously I bought the wrong grits and and I didn't spend enough time doing it. I will buy the proper grits tomorrow.

At least it is down to the copper now
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150GB Raptor 500 Barracuda Lite-on DVD-RW Combo drive vista / xp 32 dual boot 22" Samsung 226BW 
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post #2 of 17
I would recommend using the "marker" method where you draw an "X" across the bottom of the HS (from corner to corner). That way you know whether or not you are making the surface flat or not. I recommend starting off at 200 grit and then going to finer grits from there. It sucks that you can't get anything finer then 220. Keep looking though, I'm sure, even up in Canada, you guys have sandpaper somewhere.

Mark the X on the HS, and then once the X is gone you should have a relatively flat surface. If you are dry sanding then make sure you blow off the sandpaper and HS to get rid of the "residual" which could cause even more scratches on your HS. I recommend wet sanding just because there's some "lube" between your sandpaper and HS.

As far as when to actually switch to the next grit... that is up to you. When I lapped my TRUE I think I spent about 3 hours total. I didn't totally finish the whole lap job, but I got it to a point where I was happy with it. (I was also buying parts for the current WC setup so I didn't care much) Some people take 8+ hours on their lap jobs. It's all up to you and how far you want to go.
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post #3 of 17
It took me 10 hours to do my lapping on my TRUE and q6660 today..

This is what i did:
200 grit - until no all copper is showing (took 2 hours).
320 grit - to make sure everything was smoother and minimalize scratches (1 hour).
600 grit - makes everything nice and smooth - (2 hours)
1000 grit - makes everything even more smooth - (2 hours)
2000 grit - gives you that mirror finish and even smoother - (2 hours)

I took a couple breaks and stuff and a small nap but thats probably why it took 10 hours.
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post #4 of 17
Thread Starter 
Quote:
Originally Posted by beelzebub_75 View Post
I would recommend using the "marker" method where you draw an "X" across the bottom of the HS (from corner to corner). That way you know whether or not you are making the surface flat or not. I recommend starting off at 200 grit and then going to finer grits from there. It sucks that you can't get anything finer then 220. Keep looking though, I'm sure, even up in Canada, you guys have sandpaper somewhere.

Mark the X on the HS, and then once the X is gone you should have a relatively flat surface. If you are dry sanding then make sure you blow off the sandpaper and HS to get rid of the "residual" which could cause even more scratches on your HS. I recommend wet sanding just because there's some "lube" between your sandpaper and HS.

As far as when to actually switch to the next grit... that is up to you. When I lapped my TRUE I think I spent about 3 hours total. I didn't totally finish the whole lap job, but I got it to a point where I was happy with it. (I was also buying parts for the current WC setup so I didn't care much) Some people take 8+ hours on their lap jobs. It's all up to you and how far you want to go.
Thanks for your advice. Yeah I will try another hardware store, like Home Depot. They will most likely have higher grits.

At least I know how and what to expect. I was going to use the marker method you suggested, but I forgot, and I didn't want to use it half way through.

I also used soapy water as lube for the Lapping process. So though I may have bought crappy grits, I at least have some Idea how to do it.

I plan on doing this again tomorrow. Thanks for your advice rep +

Quote:
Originally Posted by Duckkie View Post
It took me 10 hours to do my lapping on my TRUE and q6660 today..

This is what i did:
200 grit - until no all copper is showing (took 2 hours).
320 grit - to make sure everything was smoother and minimalize scratches (1 hour).
600 grit - makes everything nice and smooth - (2 hours)
1000 grit - makes everything even more smooth - (2 hours)
2000 grit - gives you that mirror finish and even smoother - (2 hours)

I took a couple breaks and stuff and a small nap but thats probably why it took 10 hours.
Thanks for the tip + rep.

Which grits are completely necessary?

200, 400, 600, 800, 1000, 1200, 1500, 2000... so many to choose from!

What is ideal? I know there are lapping kits ( I think frozen cpu has one)
My System
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Q6600 @ 3.6Ghz 1.48v eVGA 680i A1 revision eVGA 9800GTX 800/2000/2350 2x1GB Patriot Extreme PC-6400 
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150GB Raptor 500 Barracuda Lite-on DVD-RW Combo drive vista / xp 32 dual boot 22" Samsung 226BW 
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My System
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CPUMotherboardGraphicsRAM
Q6600 @ 3.6Ghz 1.48v eVGA 680i A1 revision eVGA 9800GTX 800/2000/2350 2x1GB Patriot Extreme PC-6400 
Hard DriveOptical DriveOSMonitor
150GB Raptor 500 Barracuda Lite-on DVD-RW Combo drive vista / xp 32 dual boot 22" Samsung 226BW 
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Logitech G15 Antec True Power Trio 650w Antec 900 Logitech G5 
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post #5 of 17
i started at 600 and went to 2500 and got a mirror finish on my E8400
Lurking Ninja
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Lurking Ninja
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post #6 of 17
Also.. Home depot's sandpaper only goes up to 600. I would go to homedepot to get 200, 400, 600.. then gotto NAPA or some other auto parts store. I went to NAPA and got 1000 and 2000.

I used 200, 320, 600, 1000, 2000 and I got really got results two very flat surfaces is the number one priority that is why it took me so long to do it because I made sure to keep the strokes even on ever side.

The method i used:
15 strokes forwards, then 15 strokes backwards, then turn 90 degrees and repeat.
Duckie's WC Rig
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Duckie's WC Rig
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post #7 of 17
Thread Starter 
I bought my TRUE from crazypc.com lapped but I did the razor method to examine it and it doesn't appear very flat. So would you guys recommend doing both at the same time, like the Q6600, then alternate to the TRUE?

Quote:
Originally Posted by Duckkie View Post
Also.. Home depot's sandpaper only goes up to 600. I would go to homedepot to get 200, 400, 600.. then gotto NAPA or some other auto parts store. I went to NAPA and got 1000 and 2000.

I used 200, 320, 600, 1000, 2000 and I got really got results two very flat surfaces is the number one priority that is why it took me so long to do it because I made sure to keep the strokes even on ever side.

The method i used:
15 strokes forwards, then 15 strokes backwards, then turn 90 degrees and repeat.
very helpful information, yet again. Thanks alot man.
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Q6600 @ 3.6Ghz 1.48v eVGA 680i A1 revision eVGA 9800GTX 800/2000/2350 2x1GB Patriot Extreme PC-6400 
Hard DriveOptical DriveOSMonitor
150GB Raptor 500 Barracuda Lite-on DVD-RW Combo drive vista / xp 32 dual boot 22" Samsung 226BW 
KeyboardPowerCaseMouse
Logitech G15 Antec True Power Trio 650w Antec 900 Logitech G5 
Mouse Pad
Standard Mouse Pad 
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My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Q6600 @ 3.6Ghz 1.48v eVGA 680i A1 revision eVGA 9800GTX 800/2000/2350 2x1GB Patriot Extreme PC-6400 
Hard DriveOptical DriveOSMonitor
150GB Raptor 500 Barracuda Lite-on DVD-RW Combo drive vista / xp 32 dual boot 22" Samsung 226BW 
KeyboardPowerCaseMouse
Logitech G15 Antec True Power Trio 650w Antec 900 Logitech G5 
Mouse Pad
Standard Mouse Pad 
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post #8 of 17
post #9 of 17
Thread Starter 
nice guide rep +

Thanks for the help. There are tons of guides around here but yours was very simple / straight forward

Thanks bro
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Q6600 @ 3.6Ghz 1.48v eVGA 680i A1 revision eVGA 9800GTX 800/2000/2350 2x1GB Patriot Extreme PC-6400 
Hard DriveOptical DriveOSMonitor
150GB Raptor 500 Barracuda Lite-on DVD-RW Combo drive vista / xp 32 dual boot 22" Samsung 226BW 
KeyboardPowerCaseMouse
Logitech G15 Antec True Power Trio 650w Antec 900 Logitech G5 
Mouse Pad
Standard Mouse Pad 
  hide details  
Reply
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Q6600 @ 3.6Ghz 1.48v eVGA 680i A1 revision eVGA 9800GTX 800/2000/2350 2x1GB Patriot Extreme PC-6400 
Hard DriveOptical DriveOSMonitor
150GB Raptor 500 Barracuda Lite-on DVD-RW Combo drive vista / xp 32 dual boot 22" Samsung 226BW 
KeyboardPowerCaseMouse
Logitech G15 Antec True Power Trio 650w Antec 900 Logitech G5 
Mouse Pad
Standard Mouse Pad 
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post #10 of 17
Yes thanks to killa also he already got some rep from me hehe that is how I got such good results. Killa be sure to check the new thread I made tomorrow when I get my camera cord back so you can see my pictures. I got 10C differences on idle and load temps(with sam ambient temps).
Duckie's WC Rig
(13 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core i7 - 920 eVGA X58 3x SLI XFX Radeon HD 5770 XXX Edition 6GB DDR3 Corsair Dominator 
Hard DriveOptical DriveOSMonitor
Hitatchi 2TB 7200RPM LG 24x DVD Burner Windows 7 Professional 28" LG Monitor 
PowerCaseMouse
Corsair 650TX Cooler Master HAF-932 Logitech X1100 
  hide details  
Reply
Duckie's WC Rig
(13 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core i7 - 920 eVGA X58 3x SLI XFX Radeon HD 5770 XXX Edition 6GB DDR3 Corsair Dominator 
Hard DriveOptical DriveOSMonitor
Hitatchi 2TB 7200RPM LG 24x DVD Burner Windows 7 Professional 28" LG Monitor 
PowerCaseMouse
Corsair 650TX Cooler Master HAF-932 Logitech X1100 
  hide details  
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