Articles: Cooling

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Cooling Efficiency

Since our today’s test session includes five coolers with different fan combinations, we split the results into three groups on the diagrams for additional convenience. The first group includes coolers with their default fans, the second group – coolers tested with one Noiseblocker fan in two speed modes, and the third group – coolers with two Noiseblocker fans in the same speed modes:

If we compare the performance of the new coolers tested with default fans, we can conclude that their cooling efficiency corresponds to their price. The least expensive Cooler Master Hyper 212 Plus turned out the least efficient, even though it coped fine with an overclocked quad-core processor on a hot summer day. However, this is true only for the PWM model if its fan, because once you lock the rotation speed of the default fan on Hyper 212 Plus at a subjectively quiet mark of 1050 RPM, it cannot guarantee stable processor functioning in Linpack, letting its temperature rise beyond 92 °C. However, Cooler Master Hyper N620, on the contrary, is a few degrees more efficient than its counterpart even in quiet mode, although it costs exactly twice as much. As for Cogage TRUE Spirit, although its price is a little higher ($40 vs $30), it wins the race from Hyper 212 Plus in both: cooling efficiency and acoustic performance.

During the tests with one (identical) fan, we can’t help mentioning that Hyper 212 Plus is again an outsider, showing even lower results than it did in default mode (the fan rotation speed in the default mode was 200 RPM higher). The results demonstrated by TRUE Spirit turned out pretty surprising, as it outperformed Hyper N620 in quiet mode at 1120 RPM as well as at maximum rotation speed of 1760 RPM. Cogage solution falls 3-4 °C behind Thermalright Ultra-120 eXtreme (Ultra-120 lost only 1-2 °C to the eXtreme version in our earlier tests), which is actually not too bad at all. It means that the changes aimed at lowering the cooler price didn’t have a serious effect on its performance. Even though Thermalright IFX-14 requires two fans to achieve its maximum cooling efficiency, it easily defeated all the other testing participants even with one fan onboard.

Finally, come the results of the last test session where all coolers were tested with two identical fans. You can’t find Cogage TRUE Spirit with two fans anywhere on the diagram, can you? This is correct, it is simply not there, because the second fan installed for additional air exhaust didn’t have any effect on the cooler performance. That is why Cooler Master Hyper N620 can easily even the score with TRUE Spirit. By the way, although Hyper N620 lost to Thermalright Ultra-120 eXtreme, it still proved a pretty efficient cooler and at maximum fan rotation speed managed to ensure processor stability at 4010 MHz speed and 1.36875 V core voltage. Unfortunately, Hyper 212 Plus can’t boast the same cooling efficiency, and even two high-quality fans cannot salvage the situation for it. 1 °C difference between quiet fan mode and maximum rotation speed must be the result of big gaps between the heatpipes in the base of the cooler, which we have pointed out above. Despite screw-on retention used for Hyper 212 Plus that provides extremely strong hold, the heat transfer from the CPU to the cooler is not as effective, as we wish it could be.

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