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Cooling Efficiency Tests

The results of our cooling efficiency tests are summed up in the diagram and table below:

Despite our expectations, the efficiency of Akasa Venom Voodoo cooler turned out not that high. For example, at 810 RPM speed of its two “super-fans” Voodoo manages to lose 3°C to Thermalright True Spirit with one fan rotating at the same speed. Even at 1020 RPM it is still 1°C behind. As we increase the fan rotation speed in 200 RPM increments, the new Akasa cooler improves its cooling efficiency by the same 2°C at each step. It takes another 2°C off the maximum CPU temp at 1810 RPM speed, which is the maximum setting. And at this point Venom Voodoo somehow loses 3°C to the same Thermalright True Spirit cooler, which single fan rotates at only 1200 RPM.

When tested with two alternative Thermalright fans, Akasa Venom Voodoo not only fails to improve its cooling efficiency even by a tiny bit, but moreover, becomes 1°C less efficient than before at 810 and 1020 RPM. Obviously, the yellow fans with uniquely shaped blades do suit the new Venom Voodoo better than the black fans with the classically shaped blades, after all. But I have to admit that it doesn’t make up for the unimpressive performance of the new Venom Voodoo: Thermalright True Spirit with two identical fans at 810 RPM proves to be 7°C better than the Akasa cooler, and at the maximum fan speed of 2030 RPM its advantages increases to 9°C. Of course, any comparison against Thermalright True Spirit is, certainly, out of the question.

During the maximum CPU overclocking tests with Akasa Venom Voodoo the cooler allowed our 6-core processor to overclock as far as 4375 MHz at 1.4375 V core voltage. The temperature of the hottest processor core in this case was 97°C:

Now let’s see where the new Akasa Venom Voodoo cooler fits into our summary table and diagram in quiet mode and at maximum rotation speed of its two default fans:

Remember that the peak temperature of the hottest CPU core is displayed on the diagram taking into account the delta between the 25°C threshold and the room temperature during the actual test session (22.9°C in this case):

Unfortunately, the results are predictably low. In quiet mode Akasa Venom Voodoo is among the outsiders, and at maximum rotation speed of its two fans it is barely surpassing the compact Corsair H100 liquid-cooling system at the lowest fan speed.

Now it is time to check out the table and diagram with maximum CPU overclocking results for all tested cooling solutions. Besides the processor frequency, it also shows maximum temperature (taking into account the difference in the ambient temperature) and the level of generated noise. Unlike the previous summary diagram, here all participants were tested in their default configurations (i.e. without any additional/replacement fans):

Yes, we did conquer the 4375 MHz frequency under the new Akasa cooler, but unfortunately, Venom Voodoo doesn’t look too convincing against the background of other cooling systems, especially, since at maximum rotation speed of its two fans it is pretty loud.

 
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