Scythe Rasetsu Top Flow CPU Cooler

Closer look

Out of the box you can see that the Rasetsu looks very different from most other coolers on the market, even though the structured concept is very common. What makes the Rasetsu different from the others are the sharp angular cuts in the fins. As stated in the introduction this gives the cooler more surface area, which leads to more efficient cooling. The first cooler to use this way of doing things was the Scythe Yasya cooler.

The Rasetsu comes packaged with the fan already assembled but we removed it to give you a better top-view of the cooler. If you look at the Rasetsu and Yasya you can see that the similarities basically stop with the fins since the Rasetsu’s airflow is of the top to bottom design.

The cooler consist of fifty-seven aluminum fins and are supported by six copper heat pipes, measuring 0.6mm in diameter. Scythe likes to call their use of heat pipes ‘Twist Intersected pipe Structure’ which makes the pipes longer to allow for better heat transfer. Which from the side view you see where most of the twists are in the heat pipes.

The base on any of the Scythe coolers I have ever tested have never been anything but shiny. Maybe this one of the features that allows Scythe to have produced some of the most remarkable air-coolers we have ever seen.

Packaged with the Rasetsu is a 120mm Slip Stream fan, along with a rear slot fan controller. The fan has two different setting which are Min and Max allowing for two different sets of performance characteristics (or bands as they are calling it). The information below was taken from Scythe’s website:


Speed: Maximum Band

740(±25%) ~ 1,900 rpm (±25%)rpm


Speed: Minimum Band

470(±30%) ~ 1,340 rpm (±10%)rpm


Noise Level:Maximum Band

9.8 – 37.0 dBA


Noise Level:Minimum Band

7.05 – 27.3 dBA


Air Flow : Maximum Band

37.15 – 110.31 CFM


Air Flow : Minimum Band

23.0 – 76.53 CFM

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