The Test Rig:
The test machine us running Windows XP 64 bit. We are using one of the hottest (thermally speaking) Pentium D 3 GHz (over-clocked to 3.4 GHz) to really test our thermal conductivity. The heat sink is the Arctic Cooling Freezer Pro 7. This may not be top of the line, but it is in that upper group where a good thermal compound will make a big difference. This heat sink has a copper block (approx 1.5oz) in direct contact with the CPU. Our rig has an Asus p5wd2 premium with 2 gigs of Kingston ram. We are interested in CPU heat so we went with a fairly old video card to put as much work as we can on the CPU. The card we are using is an MSI 6600. We are using 3D Mark and pc mark by Future Mark with the tests set to run completely in software mode.

For our tests we use a combination of the onboard thermal reporting system as well as external inferred thermal testing equipment. Our reported temperatures below were the maximum detected temperature.

Tests Results:
We have results for our first batch (8 grams compound with the 25 Carats of diamond) and our final batch for comparison. Even the thicker compound provided some improvements, but the right consistency does make a big difference.



System Idling
System Max load
Arctic Silver with a fresh application
42c
57c
Arctic Silver with 2 week cure 
39c
54c
Diamond Grease with a fresh application
29c
38c

Summary / End Results:
While this obviously shows that the diamond compound is effective, the question I have rely had to think about is “is there a sustainable market for this”? With the amount of money that people spend on high end all copper heat sinks alone I believe there is. But a complex part of the problem of mass manufacturing is the purity of the diamond. If I am using a diamond compound I want to get the maximum amount of cooling out of it! I don’t want diamond and quarts mixed for example. Making your own thermal grease is a great option until there are better options, and its a lot cheaper too!


Update:
To my great amusement we have apparently drawn a lot of attention both positive and critical of our experiments here. It is important to maintain some clarity here in perspective. When we originally published article nearly 3 years ago there was not a single commercial diamond based product available. We were in uncharted territory with our experiments and research. It is possible and we acknowledge that our testing methodologies at the time may have been flawed, however under any and all scrutiny we have never taken the article down or changed our original findings because we feel it would be a disservice to our fans and our self’s to hide or disguise our findings.

We are excited and gratified at the amount of interest and research ongoing with this area of interest and continue to encourage both findings and research be presented in a plane and easy to reproduce method to the public to help further the DIY Enthusiasts ability to make DIY Thermal Compounds a reality.

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