Articles: Cooling

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Design and Functionality

The cooler is really very small, its heatsink fits completely under a 92mm fan. To be more exact, AURAS TwinW measures 92.5 x 82 x 107.4mm and weighs 401.5g:

The cooler is made of two heatsinks. Each consists of thin aluminum plates sitting on three copper heatpipes 6mm in diameter. There is a 92 x 25mm fan inserted between the two heatsinks:



The sides of both heatsinks are closed with bent edges of the heatsink plates. By the way, the heatsink plate arrays are of very interesting design: the plates are placed in a W-shape on two levels:

According to AURAS engineers, this plate profile reduces the generated noise and improves the cooling efficiency of their solution.

The second interesting peculiarity of this compact cooler is the heatpipes placement in the heatsink:

Note that on the photo above the heatpipes in the right part of the heatsink are grouped together, while in the left part they sit far apart. The manufacturer doesn’t explain this design peculiarity in any way. Therefore, we suppose that the heatpipes are groups t the side where the airflow comes in in order to reduce the resistance to this airflow (the air doesn’t really get sucked in at the fan core). The slits on the inside of the heatsinks may be serving the exact same purpose.

92-mm fan is inserted in-between the heatsinks from the top and is then fastened with four screws:

It is equipped with a four-pin cable and supports pulse-width modulation (PWM) fan rotation speed control mode. The fan rotation speed can be adjusted in the interval from 1200RPM to 2100RPM with the maximum airflow of 41.15CFM and 22dBA of noise. The MTBF of the sleeve bearing in the fan is not specified, but it can be easily replaced in case of failure.

The heatpipes are soldered to the copper plate in the base of the cooler:

Of course, no one will work on the grooves for the heatpipes in the cooler base for a low-cost solution like that, but the use of soldering instead of thermal glue at the contact spots is a good sign.

The copper base is not polished off to mirror shine, but is finished quite nicely:

The base surface is very even and a piece of plastic film protects it from accidental scratches and chipping.

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