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View Full Version : what you guy think about lapping cpu



darktron
08-26-2010, 12:22 AM
i'm think of lapping my cpu and have better tamp and speed to my cpu and what you guy think of lapping cpu

xeromist
08-26-2010, 12:46 AM
It will void your warranty and it's not a miracle cure, but if you're looking to eek out that last bit of performance then it can help. Know that you might also need to do the heat sink if it has a slightly irregular surface.

darktron
08-26-2010, 01:17 AM
one of my friend is doing it but i'm think of doing or not so i can see what you guy think about it. let my friend do his so he can be my guinea pig to see how it come out

Brian@ASUS
08-26-2010, 07:06 AM
I say Not worth it. Do the heatsink first. You'll get more gains off that but honestly to get about 1-2 degrees off the CPU, I rather purchase a better cooler or go water. Maybe if you got the CPU for free and don't care about warranty or selling it off in the future.

V2-V3
08-30-2010, 09:47 PM
If loosing your CPU's warranty is not a problem than lapping is just for you, you could take it up to the next level of extreme and remove the IHS of the CPU. Removing the "Integrated Heat Spreader" will give you the best possible temperatures.

Most important thing in CPU/Heatsink temps is your thermal interface material "TIM" you will see the biggest temp drop here. I recommend you look at getting one ore both of these TIM Indigo Xtreme (http://indigo-xtreme.com/) and IC Diamond (http://www.innovationcooling.com/)
this is all I will use for my systems.


I do agree with Brian, lap your heatsink first, this will drop your temps, keep your warranty, and when you test contact with a good flat heatsink you will see if your CPU is flat or not and even if you would need to lap the CPU.

Kal-EL
08-30-2010, 10:04 PM
IC Diamond will fill the micro-gaps on the h/s, so will the indigo Xtreme stuff. Lapping only becomes a necessity if the cpu IHS is con-caved like some 45nm cpu's were and/or the h/s is also "not level". Lapping isn't just for smoothing out the surface but also making it level. It takes a bit of work but the results are definitly tangible for the non-rma crowd. The temp drop from IC Diamond alone will blow your mind. Indigo Xtreme, well, just looking at the product brief should tell you everything.

Pea sized drop of TIM, press down, quarter turn of H/S in both directions, bolt down and let her rip.

V2-V3
08-31-2010, 04:30 AM
For those of you who don't know what lapping means here is a definition:
Heat sink lapping is the smoothing and polishing of the contact (bottom) part of a heat sink to increase its heat transfer efficiency. The desired result is a contact area which has a more even surface, as a less even contact surface creates a larger amount of insulating air between the heat sink and the computer part it is attached to. Polishing the surface using a combination of fine sandpaper and abrasive polishing liquids can produce a mirror-like shine, an indicator of a very smooth metal surface. Even a curved surface can become extremely reflective, yet not particularly flat, as is the case with curved mirrors; thus heat sink quality is based on overall flatness, more than optical properties. Lapping a high quality heat sink can damage it, because, although the heat sink may become shiny, it is likely that more material will be removed from the edges, making the heat sink less effective overall.
If attempted, a piece of float glass should be used, as it self-levels as it cools and offers the most economical solution to producing a perfectly flat surface.

Brian@ASUS
08-31-2010, 05:06 AM
mirror like

CPU
http://t3.gstatic.com/images?q=tbn:MIY3Kw6nB6IPqM:http://i40.tinypic.com/2nm2hoj.jpg&t=1

HEATSINK
http://t3.gstatic.com/images?q=tbn:VCunnuz15tj4mM:http://i45.photobucket.com/albums/f66/YourOtherMan/IMG_5742.jpg&t=1

Splave
08-31-2010, 07:59 AM
dont do it, not worth loosing a warranty over

darktron
09-01-2010, 03:58 AM
will on monday i when to my friend house to do the lapping cpu and heatsink for my friend. just to tell you guy never doing that **** again 6 hr of doing this **** boring. thx god i'm not doing it on my cpu or heatsink. but it is all good he pay me to do it so i make good money out of it. my friend is to lazy so he pay me to do it for him

Brian@ASUS
09-01-2010, 08:25 AM
did you see any before and after temp differences?

Hpnotiq
09-01-2010, 10:15 AM
Pea sized drop of TIM, press down, quarter turn of H/S in both directions, bolt down and let her rip.

This is interesting Kal-El, have you ever tried spreading the TIM out with a razor versus using the heat sink? I personally like to spread a very thin layer over the entire cpu or heat sink surface (sometimes its just much easier to apply to the heat sink first) so that I ensure that I get a nice full thin coat. Unless thats what you meant by "press down" but I'm not sure how you do this.