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Design and Functionality

Scythe Susanoo cooler is built on twelve copper heatpipes 6 mm in diameter, which come out of the copper base and hold two heatsink arrays:


There is an additional aluminum heatsink installed right above the heatpipes and the two primary heatsink arrays are topped with four fans. As we have already pointed out in the beginning of our review, this cooler is 210 mm long by 210 mm wide, and its height is more typical of a tower-cooler rather than a top-cooler and equals 160 mm. Susanoo weighs 1565 grams.

Scythe introduced a new abbreviation in the description of technologies implemented in the new Susanoo cooler. It reads W.A.M.S. – Wide Area Multi-fan System – and stands for wide airflow coverage of the mainboard surface. However, we didn’t expect anything else from a cooler of this size equipped with four 100-mm fans installed side by side:


The heatsink consists of two aluminum arrays. The largest array has 42 0.4 mm thick fins measuring 206.5x38.5 mm. They are spaced out at 2.2 mm distance from one another. The smaller heatsink array consists of 26 find with the same thickness but smaller in size: 160x13 mm. These fins have smaller intervals between them:


Taking into account the number and size of the fins we can calculate the heatsink effective surface size, which is 15,500 cm2! This is a record among contemporary processor coolers. At the same time, we have to mention that the fins are pretty loose on the heatpipes and the side ones threaten to slide off them completely. They used no soldering or thermal glue of any kind. All the contact spots are quite unsatisfactory.

Each of the heatsink arrays is pierced with 6 mm heatpipes almost evenly. They come out of the copper base in two rows:


The heatpipes in the bottom row lie in special grooves and pierce the large heatsink, while the heatpipes in the top row lying directly on top of the first six heatpipes pierce the small heatsink. The top of the second-row heatpipes contacts the additional 82x56 mm heatsink. So, here everything looks more or less proper and solid. The heatpipes are most likely soldered to the base, although it done so neatly that we couldn’t find any traces of it.

The thinnest part of the base beneath the heatpipes I 2 mm, but the actual contact pad makes it another 2 mm thicker:

As we can see, the 38x38 mm heat-spreader pad is finished perfectly, but its evenness leaves much to be desired, unfortunately. Two barely noticeable dimples in the base plate combined with uneven heat-spreader of our test processor and insufficient pressure to the CPU produced the following imprints:


They look quite terrible, don’t they? And even excessive amount of thermal compound didn’t eliminate the “bare” spots. Nevertheless, we didn’t even out the base in any way. The cooler was tested “as is”.

Scythe Susanoo is equipped with 100x100x25 mm fans connected with each other using metal panels and screws:

The fans have SY1025SL12LH model number and use slide bearings. Their MTBF is not indicated, but it is hardly more than 30,000 hours.

All fans rotate with synchronous speed controlled by a compact rheobus, which can be installed instead of one of the brackets on the system case back panel:

You will need one PATA connector on the power supply for this rheobus. And then you will need to connect one single cable to the mainboard CPU fan plug in order to monitor the fans rotation speeds. The fan speed may vary in the interval from 500 to 2000 RPM creating a combined airflow of 50.5-200.21 CFM. The fans generate between 9.42 and 37.69 dBA of noise. They should consume no more than 10 W of power, which was confirmed during our test session: our measurements detected power consumption of 9.1 W. The startup voltage turned out pretty low – 2.6 V. The power cables are only 300 mm long, which may be too short if you want to install the panel in one of the bottom case bays, which are usually free. That is a definite miss.

The fans are attached to the heatsink using three wire clips, which are inserted into the special heatsink grooves as well as holes in the fans themselves:

Note that Scythe Susanoo comes with no vibration-consuming parts of any kind.

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