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The OCZ Hydrajet cooler, featured upside-down to reaveal the carbon nanotube conductor. (Source DailyTech, Anh Huynh)
The OCZ Hydrojet cooler uses an advanced heatsink material

The first heatsink to make use of directional carbon nanotubes, the OCZ Hydrojet, was on display at Computex 2007. Carbon nanotubes, an allotrope of carbon, are widely regarded as the next major thermal interface material because of their superior thermal conduction properties.  

The contact base of the OCZ Hydrojet is made completely of carbon-nanotubes, which OCZ claims are five times more efficient than copper. Carbon nanotubes have been looked upon as a strong alternative to traditional copper based heatsinks. They are ideal for application in heat transfer products because of their impressive heat-conduction properties.  Carbon nanotube based interfaces have been shown to conduct more heat than conventional thermal interface materials at the same temperatures. In addition, they have shown to be ballistic conductors at room temperature, which means electrons can flow through CNTs without collisions.

Carbon nanotubes are small wire-like structures made out of a sheet of graphene.  The sheet of graphene used to construct CNTs is roughly one-atom thick, and is rolled up into a cylinder. The diameter of the cylinder ranges in the nanometers.

Unlike most other thermal materials, carbon nanotubes are able to move heat in one direction. On the other hand, copper, which is looked upon as one of the more superior thermal materials, moves heat radially. In the case of CNTs, heat is moved along the alignment of the nanotubes.


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RE: ?
By Hare on 6/9/2007 4:43:30 AM , Rating: 2
As we have seen with heatpipes more is not necessarily any better (See Tuniq Tower). The bottleneck is elsewhere (not base conductivity). To actually get the heat out of the heatsink in to the surrounding air is the biggest problem. The brute force method of increasing the surface are or using a more powerful fan are the obvious ways to increase performance.


RE: ?
By Omega215D on 6/9/2007 7:27:13 AM , Rating: 2
That's why I'm happy with the Zalman CNPS 9500 cooler. It has a unique method of pulling air into the cooler and passing it out to the exhaust case fan all while being pretty quiet.


RE: ?
By Kaleid on 6/9/2007 8:16:00 AM , Rating: 2
Unfortunaly Zalman fans are not quiet enough even at the lowest setting (5v).


RE: ?
By oab on 6/9/2007 8:50:40 AM , Rating: 2
"Not quiet enough" is completely subjective based on ones own individual tollerances for noise.

Obviously for the poster, he thinks it is "quiet enough" for him.

Now, if someone were to call a 10k RPM Delta fan quiet, then he needs to have his head examined, but the fan in my zalman coolers is "quiet enough" that I have no complaints, I can't hear it above the ambient noise in my room.


RE: ?
By tehfire on 6/9/2007 11:51:02 AM , Rating: 2
Scythe Ninja Rev B. w/ Stock fan @ 7v ftw :-P


RE: ?
By dever on 6/9/2007 1:20:31 PM , Rating: 1
That's what I immediately thought of. Nanotubes aren't very long, so the surface area on the other side is about equal to the area on the base. Whatever is on the top needs to be able to dissipate the heat well. I too would like to see some empirical results.


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