Scythe NCU-2000 Fanless CPU Cooler

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Here's the retail box and all of the contents, excluding the red and yellow tape measure.

The instruction sheet is in Japanese and English. It is detailed enough and well-illustrated to ensure correct installation. There is a separate sheet of safety precautions, which is quite extensive and detailed. As with the NCU-1000, there are explicit cautions about the toxicity of the HFC-134A coolant fluid in the heatpipe. The box, too, has a lot of text, including warnings and cautions about use and applicability, including the following:

"This product is designed for the usage such as e-mailing, Internet browsing, word processing and spreadsheet or an equivalent at an ambient temperature up to 25C. Please note that this product is NOT for conditions such as data encoding/decoding, using benchmark software, and/or other extraordinary conditions. The manufacturer accepts no liability for the usage of this product not complying with the warning listed above."

That's a pretty serious disclaimer, similar to the one that accompanies the NCU-1000. You get the sense that they're heeding the advise of the company's lawyer. The above disclaimer is combined with many other cautions on the box, including:

  • Ensure good ventilation for the PC case
  • Monitor temps on high speed CPUs
  • Don't use the HS on a horizontal motherboard
  • Check fit as it may not fit some motherboards
  • Use it only with a new motherboard

Whew! All this could make you nervous, but if you're even looking at this product, chances are pretty good that you are technically adventurous (at least with your PC) and you've got some understanding of thermal issues in PCs.


Some assembly is required. The assembly is not difficult. Four bolts sandwich the bottom portion of the HS between the copper base and the mini-heatsink at the bottom. It ends up looking like this:

Configured for socket 478; on each side, a metal strip into which the screw threads acts as a spring tensioner.
Photo above shows HS set up for A64. There is a spring loaded bolt on each side.

The copper base plate can be turned 90 degrees from the position shown above. The instructions state that the wider side of the fins structure should face up/down. Which way the copper plate should be mounted depends on the CPU socket configuration of the motherboard. The point is that you want the holes in the heatsink to be facing up/down rather than side/side so that air will flow through them in natural convection.

The copper base is smoothly polished. Some fine machining lines are visible and can be felt with a fingernail. Lapping might make a difference but I think it would very small.

Base can be mounted rotated 90 degrees from the above.

Depending on which way the base is mounted, the mounting bolts end up under the side-extended fins. Access to the bolt then becomes impossible with a screwdriver, which is why Scythe includes a small wrench for the hex-headed bolts. I found out firsthand how tedious it is to install this HS with the base mounted the hard way.

Wrench, P4 clip with hex/Phillips head bolt, and P4 clip on one side HS on motherboard.

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