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Cooling Efficiency Tests

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

Analyzing the results obtained with default fans (the first segment on the diagram above), we can conclude that the cooling efficiency of Cooler Master Hyper 612 PWM is about the same as that of Thermalright True Spirit. The latter was about 1°C better in selected high-speed modes. Unfortunately, if we take into account the price of both coolers, the situation will obviously be not in Cooler Master’s favor, because the difference in price between these two systems is more than 65%. As for the comparison against Archon, the results were pretty predictable: the super-cooler was 7-9°C more efficient in quiet modes, while at maximum fan speed Hyper 612 PWM managed to reduce the gap to 4°C. Although the difference in noise levels was much more dramatic in both cases, but we are going to talk about it a little later.

The tests performed with two alternative fans instead of the default ones didn’t change much in the overall picture between Hyper 612 PWM and True Spirit. They are still very close to one another in cooling efficiency. Here I have to point out that the new Cooler Master cooler does in fact respond better to getting equipped with two fans than True Spirit cooler from Thermalright. It was, actually, quite expected, because Hyper 612 PWM heatsink is nearly twice as wide as the True Spirit one.

Cooler Master Hyper 612 PWM did very well in the maximum CPU overclocking tests. It allowed our 6-core processor to overclock as far as 4450 MHz at 1.45625 V core voltage with only one default fan working at its maximum speed. The temperature of the hottest processor core in this case was 89°C:

One default fan at 1870 RPM

Two Thermalright TR-FDB fans at 1870 RPM

With two Thermalright TR-FDB fans working at the same speed the processor was another 3°C cooler. Unfortunately, the use of two fans didn’t help Cooler Master Hyper 612 PWM improve our CPU overclocking results any further.

Now let’s see where the new Cooler Master Hyper 612 PWM cooler fits into our summary table and diagram in quiet mode and at maximum rotation speed of its one default and two alternative (Thermalright TR-FDB) fans:

The fire-red color on the diagram indicates peak temperature of the hottest CPU core taking into account the delta between the 25°C threshold and the room temperature during the actual test session. The green color stands for the noise levels in the corresponding modes:

As we can see, the new Cooler Master Hyper 612 PWM is somewhere right in the middle in quiet as well as maximum fan(s) speed modes.

Now let’s 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):

In fact, Cooler Master Hyper 612 PWM looks very good here, outperforming in efficiency and acoustics the compact Corsair H80 liquid-cooling system equipped with two fans rotating at 2000 RPM. The maximum CPU overclocking for the new Hyper 612 PWM was 4450 MHz at 1.45625 V.

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