However, the LGA 1366 platform has symmetrical retention holes therefore you can also install the ETD-T60-TB cooler in an incorrect way, i.e. with the ends of some heatpipes pointing up and some – down:
In this case Enermax ETD-T60-TB will be cooling an overclocked six-core processor as follows:
In other words, it won’t be cooling it at all. However, it turned out that we shouldn’t pin this on the “incorrect” cooler installation. In fact, there was simply no proper contact between the base of the cooler and the prominent heat-spreader of our test CPU:
Turning Enermax ETD-T60-TB 90° counterclockwise improved the contact, although it was still far from ideal:
Despite this fact, ETD-T60-TB still refused to maintain the stability of our CPU overclocked to 4.3 GHz at 1.3875 V Vcore (even at maximum fan rotation speed and with removed system case side panel, which is of utmost importance for top-coolers):
Therefore, we had to lower the CPU frequency to 4.1 GHz and drop its core voltage to 1.3 V. In these testing conditions Enermax ETD-T60-TB managed to ensure stability of our six-core processor even in a closed system case. Although it was still unable to compete in any way against Thermalright HR-02 Macho tower-cooler (which is also cheaper on top of everything else):
As we can see, at best (and without taking into account the noise) Enermax ETD-T60-TB is 10°C behind Thermalright HR-02 Macho under peak load, and in the worst case the difference reaches 21°C. However, there was no ideal contact between the base of the new Enermax top-cooler and the CPU heat-spreader, so I am sure that it could also partially explain this unimpressive performance.
Since we didn’t have another LGA 1366 CPU at our disposal at the time of tests and we didn’t feel like lapping the surfaces for a perfect match, we decided to run a series of additional tests using an AMD FX-8150 based platform. The cooler was installed in the “correct” position recommended by the manual:
The thermal paste imprints were practically perfect:
Now Enermax ETD-T60-TB can’t find any excuses, so let’s see how well it does in ideal testing conditions (with removed system case side panel) with an eight-core AMD CPU overclocked to 4.3 GHz at 1.28125 V Vcore:
True, Enermax ETD-T60-TB feels much more confident here, although it is still 4-6°C behind the tower-cooler depending on the fan rotation speed. Although I have to admit that in terms of noise HR-02 Macho is still superior, which we are going to discuss in just a few paragraphs. Here I would like to add that when we closed the system case side panel, our top-cooler lost about 5~7°C of cooling efficiency, while the efficiency of its tower competitor lowered by only 2~3°C.