CPU cover temperature, ergonomic domain (31 dBA to 36 dBA)

Thermal resistance, ergonomic domain (31 dBA to 36 dBA)

Switching to the ergonomic mode (1200 RPM) doesn't provide a significant performance boost. The results remain good, but you can see that the Siberia is more of a mid-end product. Unlike the universal Alaska, it's tailored to low-noise modes. Even considering good results, speeds of about 1200 RPM don't look optimal for the Siberia.

Finally, below are the results obtained in the typical mode (at maximum fan speed) and the efficiency/noise rating based on the low-noise and ergonomic domain results.

CPU cover temperature, typical modes

Thermal resistance, typical modes

Efficiency/noise rating

Conclusions

As we all know, marketing product names are just meant to make products look better. "Alaska" and "Siberia" do not seem an exception, but they actually correspond to the great performance of both coolers. As we have already stated, the Siberia is more of a special-purpose solution tailored to low-noise performance in HTPC rigs — unlike the universal Alaska. But based on the test results, we can recommend any of the two for use with quad and hexacore processors from Intel and AMD at real heat loads of up to 180-190 watts.

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