- Feb 23, 2005
- 3,100
- 149
- 116
Make your own thermal paste with DIAMOND!
- Thread starter SketchMaster
- Start date
Throckmorton
Lifer
- Aug 23, 2007
- 16,830
- 3
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Q=UAdT, where dT is the log mean temperature difference between the two sides, A is the area through which heat is conducted, and U is the conductance....basically a constant k over the thickness dx.Originally posted by: Evadman
that seems like too high of an increase. I can't believe that the grease is inhibiting that much heat transfer. I need to learn more about thermodynamics.
You have to dissipate a constant amount of heat, equal to the CPU's output...so in the neighborhood of 100W. Being able to do this across a low delta-T requires the conductance to be very high. Assuming that the heatsink temperature at the point of contact is ~30 degrees in both cases, and the thickness of the paste is constant, that means that the diamond paste has to be 3 times as conductive as the AS. Is we assume the heatsink is at ~20 degrees, that goes to 1.9 times as conductive to achieve the stated performance (54->38).
That's well within the stated difference in conductivity between silver and diamond, where of course the grease that holds the stuff in suspension will decrease the performance of both.
quadomatic
Senior member
- May 13, 2007
- 993
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- 76
Thermal grease with diamond dust in it is allready available for purchase if I'm not mistaken. Can't find the link someone else posted not long ago with a roundup of several thermal greases, including one with diamond dust in it.
I would imagine you could also use this for lapping your heatsink... but it would be an expensive way to do so.
SpeedEng66
Diamond Member
- Jul 10, 2002
- 4,501
- 1
- 81
I wonder how this stacks up to coollaboratory pro or mx-2...
(Both own the &*$#! out of Arctic Silver.)
Read some reviews... seems like the two I mentioned are still the way to go!
(Both own the &*$#! out of Arctic Silver.)
Read some reviews... seems like the two I mentioned are still the way to go!
The only US e-tailer that ships to Canada I can find is Directron, but it's gonna cost $31 to have it shipped, that's not really worth it. I haven't found it anywhere in Canada. Oh well, I still have some Shin-etsu X23 I have to use anyway.
I was looking at some forum reviews (they gave a bunch away to OC Forums members), and they were really only getting a few degrees improvement over AS5. Maybe this stuff is not as good as the home made stuff.
Amazing results even when applied improperly. Imagine how much more of a temperature drop it can provide if it wasn't applied like peanut butter.
That is really cool. I'm definitely going to give this a try. I'll purchase an inexpensive testbed for this. Would you a say a hot running Prescott P4 would be a good one to start with?
nice results. diamond is the industry standard for heat dissipation during optical probing.
next step, replace the integrated heat spreader with a diamond solution.
next step, replace the integrated heat spreader with a diamond solution.
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