Cooling Efficiency Tests
The results of our cooling efficiency tests are summed up in the diagram and table below:
Well, what can I say? You see everything with your own eyes: Enermax ETS-T40-VD suffers a devastating defeat not only from Thermalright HR-02 Macho with the same exact price tag, but even from the less expensive True Spirit, too. Under peak operational load even at maximum rotation speed of its default fan (1840 RPM) the new Enermax cooler yields 3°C to True Spirit with the fan rotating at its minimal speed of 800 RPM. This is not a good situation for the ETS-T40-VD. It looks like this cooler is unable to cope even with moderately overclocked six-core processors.
I have to admit that we did everything we could to improve the cooling efficiency of this product. The use of two fans instead of one delivered a 2-degree increase in efficiency under maximum load on the hottest processor core, which indicates that the heatsink is indeed well optimized and doesn’t depend too much on the airflow speed and volume. Moreover, we replaced the default Enermax ETS-T40-VD thermal paste – Dow Corning TC-5121 - with ARCTIC MX-4, and the cooling efficiency dropped by 3°C on the maximum temperatures, which is quite logical considering the heat conductivity of these two thermal interfaces. Finally, the cooler was removed and installed fresh multiple times and even rotated 90° in an attempt to find a better positioning of the heatpipes in respect to the processor heat-spreader. But all these efforts were vain. I believe the obtained results are indeed the best Enermax ETS-T40-VD can do.
That’s a real pity, but there is nothing else we can do at this point. Let’s move on to the acoustic performance of the newcomer.