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Acoustic Performance

We measured the noise level of the two tested coolers throughout the entire speed range of their fans, as described in the chapter on testing methodology. Here are the results:

Despite fans of different diameter, the noise curves for Scythe Grand Kama Cross Rev. B and Thermalright TRUE Spirit 120 are very close. And even though top-cooler loses to its competitor in this aspect, the difference is pretty small, as we can see. The 140 mm Scythe fan remains in a subjectively comfortable acoustic zone up to 1050 RPM, while the 120 mm Thermalright fan is still acoustically comfortable at 100 RPM higher speed. In quiet mode the RPM difference is a little higher 860~870 RPM for Grand Kama Cross and 980~990 RPM for TRUE Spirit 120. Nevertheless, going back to the cooling efficiency tests now that we know the noise readings we can conclude that lower noise of Thermalright TRUE Spirit 120 doesn’t save this tower-cooler from an overall defeat from Scythe Grand Kama Cross Rev. B. Even at maximum fan speeds.

Conclusion

The formally modified Scythe Grand Kama Cross Rev. B accomplished something practically impossible: it outperformed the reigning leader in the $40 price segment in cooling efficiency and acoustics. Most remarkably, it is a top-cooler, and not another tower, which could be more logical and predictable, based on our experience in the field. At the same time, do not forget that Thermalright TRUE Spirit 120 will still be preferable for more aggressive CPU overclocking. As for Scythe Grand Kama Cross Rev. B, this model has definitely not exhausted the potential for further modifications and improvements. Take, for instance, the missing grooves in the base plate where the heatpipes are soldered, higher-pressure retention, or silicone mounts for the 140 mm fan instead of the screws. Time will show if Scythe decides to implement any of these and when. Today, Scythe Grand Kama Cross Rev. B is a very worthy top-cooler for systems with moderately overclocked processors. And taking into account the popularity of Scythe products, very competitive price of Grand Kama Cross Rev. B, its universal design, simple installation and efficient cooling of the around-the-socket area and memory modules, this cooler should become pretty popular. And we wish it all the best!

 
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