Articles: Cooling

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Cooling Efficiency Tests 

All test results are summed up in the diagram and table below:

First of all, let’s discuss the results of our coolers tested with one default fan only. So, Scythe Mine 2 really outperformed the already former leader – Mugen 2. Moreover, Mine 2 did it at only 800 RPM of its 140 mm fan, while the 120 mm fan of the Mugen 2 rotated at 1020 RPM. Of course, since these two fans are of different diameter the noise they generate will be about the same, but Mine 2 still proved to be 2°C more effective. Although Mugen 2 improves a lot as soon as its fan speeds up to the maximum 1350 RPM (the temperature drops from 93°C to 86°C), Mine 2 still remains 2 degrees better at 1200 RPM and then at 1710 RPM showing the same temperature reduction dynamics. If we compare the efficiency of these two coolers at the maximum rotation speed of their default fans, then Mine 2 will be as much as 6°C more efficient than Mugen 2, although the noise will definitely be not in Mine 2’s favor. Despite the success of the new Scythe cooler compared with its predecessor, Thermalright Archon is still undefeated at the min as well as max TY-140 fan speed.

With two Scythe Slip Stream 140 fans things change. Mugen 2 benefits most of all from having two 140 mm fans onboard. This intense airflow increases the cooling efficiency of its wide heatsink leaving Mine 2 1-2-3°C behind in the entire rotation speed range. At the same time, we can’t deny that adding a second fan to Mine 2 is very beneficial. If we compare the results with what we have just seen in default (one-fan) mode we will notice that at 800 RPM the temperature drops by 4°C; at 1000, 1200 and 1400 RPM – by 3°C; at 1720 RPM – by 2°C. However, the third fan does nothing for Mine 2: it even gains 1°C at 800 and 1000 RPM that is why we decided not to overload the diagram with non-illustrative results.

Thermalright Archon with two Scythe Slip Stream 140 fans is again more effective than any of the tested competitors in all rotation speed modes, but it costs about 33% more. In addition I would like to draw your attention to two last scores on the diagram obtained with a pair of Thermalright TY-140 fans. This data is particularly interesting because as we can see, at 800 RPM the CPU temperature is about the same as with Scythe Slip Stream 140, while at 1290 RPM two Thermalright TY-140 fans cool the Archon heatsink only a little bit worse than two Scythe Slip Stream 140 fans at 1710 RPM! Of course, the difference in acoustics is obviously not in Scythe’s favor.

However, this isn’t the end of our test session yet. Let’s check out all three competitors during maximum CPU overclocking experiments using two Scythe Slip Stream 140 fans at 1710 RPM. Scythe Mine 2 and Mugen 2 managed to have the CPU pass all tests stably at 4.48 GHz frequency and 1.46857 V Vcore. Thermalright Archon also joined them:

Scythe Mine 2

Scythe Mugen 2

Thermalright Archon

The hottest CPU core under Scythe Mine 2 hit 86°C. Mugen 2 turned out 5°C more efficient in the same testing conditions, while Archon managed to ensure another 3°C lower temperature. Moreover, Thermalright cooler allows overclocking our processor to a little higher frequency and core voltage, while both Scythe coolers can’t do better.

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