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Zalman ZM-2HC1 Heatpipe HDD Cooler Review
Zalman ZM-2HC1 Heatpipe HDD Cooler Review
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Abstract: A better solution recently came to light in the form of Zalman's ZM-2HC1 heatpipe hard drive cooling rack, primarily because it addresses the noise and vibration factor.

 Company link  Category  Published  Author 
Zalman   Cooling / Heatsinks   May 24, 2004   Max Page  


Zalman ZM-2HC1 Heatpipe HDD Cooler Review

Ever since the first removeable hard drive rack made its way into the hands of consumers, enthusiasts have been looking for ways to cool down their hard drives.... not so much because the fate of a computer rests on this, but because they tend to dump a lot of heat into the case. A single hot hard drive isn't much to worry about, but stack up three hot hard drives, or a set of SCSI drives and appropriate cooling becomes a concern.

Removeable hard drive racks often used combinations of aluminum chassis, or little 30mm fans in an attempt to cool down the drives they contained. The problem was that no measures were taken to address the noise and vibration the hard drives may have created, in addition to the heat whipped up by platters spinning at several thousand RPM.

While fans are easily the quickest way to cool down a toast drive, they create noise. Passive heatsinks are a good option, but in and of themselves they aren't really all that necessary. A better solution recently came to light in the form of Zalman's ZM-2HC1 heatpipe hard drive cooling rack, primarily because it addresses the noise and vibration factor.

Heatsink Specsheet:
  • Model: ZM-2CH1
  • HS Material: Extruded aluminum and copper heatpipes
  • HS Dimensions: 146x146x37mm
  • Weight: 260 grams
  • Made by: Zalman Tech Co

Sold By: www.zalmanusa.com

Any 3.5" hard drive, IDE or SCSI, can be mounted within the Zalman ZM-2HC1 frame which is comprised of a couple of aluminum sections, and (10) 5mm diameter copper heatpipes. The unit requires no fan to operate, weighs about 260 grams, and has a cooling surface area of approximately 400cm squared.

The flat aluminum bars screw directly onto the side of a 3.5" hard drive, where they sandwich in the ends of the ten heatpipes. The aluminum sections act as a heatsink for the hard drive, and transfer that heat to the copper heatpipes.

However, unlike a typical application of a heatpipe in a heatsink, the point is not to move heat from one side of the hard drive to the other. The goal is to move heat from the sides of the hard drive to the elevated heatpipes where they are then cooled by convection, or forced air.

Each of the heatpipes stands about 7mm over the top of the hard drive, leaving plenty of space for airflow to pass through, usually to the tune of 3-4 degrees Celsius cooling without forced air. By adding in a low noise fan blowing in the direction of the ZM-2HC1 hard drive cooler, that temperature difference can further be increased.

To accommodate the larger dimensions of the Zalman ZM-2HC1 it is necessary to mount it in a 5.25" bay, or used the included mounting kit and drill some holes in the base of the case, mounting it directly to the case chassis. The key to either of these mounting choices, are the set of four rubber vibration absorbing posts.

These rubber posts allow the hard drive and ZM-2HC1 to be firmly attached within the 5.25" bay, or to the base of a case, while at the same time addressing vibration and subsequent noise concerns. To maintain the proper grounding of case components, and additional jumper is included so you can ground the hard drive to the chassis as well (this allows any static which may build up by the drives platters spinning, to be grounded).

There isn't all that much to say about the Zalman ZM-2HC1 in the grand scheme of things. The heatpipes are cooled by air flow, and that creates a temperature gradient between the center of each copper tube, and the aluminum rails which attach to the side of the hard drive.

The cooling factor without airflow assistance is only a few degrees, and I don't think this makes much of difference as far as the hard drive is concerned. The vibration absorption on the other hand, can have a large impact on how noisy a case is.


° Next Page 

Table of Contents:

 1: — Zalman ZM-2HC1 Heatpipe HDD Cooler Review
 2:  Testing the ZM-2CH1

List all Zalman heat sinks that Frostytech tested?

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