Articles: Cooling

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Each cooler has its own unique base. Cooler Master Hyper 212 Plus uses Direct Contact technology with a 3 mm (!) gap between the heatpipes in the base. Our experience with cooling solutions using Direct Contact technology indicates that the distance between the heatpipes in the base of the cooler is critical for maximum cooling efficiency. The smaller this gap is, the better. However, Hyper 212 Plus has an extremely large distance between the heatpipes:


Hyper N620, in its turn, has a classical copper base plate. The heatpipes lie in special grooves and the contact surfaces are all soldered together. The base of TRUE Spirit cooler is built according to the same exact principle, but it is also nickel-plated.

Unfortunately, TRUE Spirit inherited not only the shape of the Thermalright Ultra-120 heatsink, but also a bent base plate surface:


Surprisingly, Hyper N620 also has a small bump in the center of the plate, though it is not so prominent as by TRUE Spirit:


Of course, these defects did affect the quality of the thermal imprint left by the evened out and polished processor heat-spreader on the cooler bases:


Cooler Master Hyper 212 Plus has a very even base, but unfortunately, the thermal compound imprint on the CPU surface turned out “striped” with gaps from the aluminum inserts between the heatpipes:

Of course, in this case we can’t claim that there will be any even heat flow exchange between the CPU and the cooler.

All three cooling solutions discussed today are equipped with 120x120x25 mm fans. The fan shape and structure is completely different in each case:



Hyper 212 Plus is equipped with a black matt fan with seven blades of very sophisticated shape. Their exterior edge is so bent that it looks like the blades are “floating” over the heatsink surface instead of sending the airflow straight through it. Hyper N620 has glossy fan frame and blades that is why these fans looks very pretty. Eleven semitransparent crescent-shaped blades are very aggressively curved. The fan installed on TRUE Spirit cooler is somewhat similar to Noiseblocker NB-BlackSilent fans, but the blades are of different color here.

The fan rotation speed of the fans on all three coolers is PWM controlled. The rotation speed of the fan on Hyper 212 Plus can vary in the interval from 600 to 2000 RPM, on Hyper N620 – from 800 to 2000 RPM, and on TRUE Spirit – from 1000 to 1500 RPM. The claimed noise levels for all three are 13-32 dBA, 16-28.8 dBA and 19.6-37.4 dBA respectively. You can check the spec table below for other fan specifications, and now let’s take a look at the stickers on the fan rotors:


The interesting thing is that the sticker on the TRUE Spirit fan rotor states a different rotation speed interval than the cooler specifications (1000-1800 RPM vs. 1000-1500 RPM), and according to the monitoring data, the fan was working at 1030-1650 RPM. Here I have to add that the fans used on Cooler Master solutions are based on so called rifle bearings with the claimed MTBF of 40,000 hours. Cogage TRUE Spirit fan also uses a slide bearing, but its MTBF is not specified in the specs.

The fans on Hyper 212 Plus and TRUE Spirit coolers are attached to the heatsink with wire clips (by the way, there are four of them included with Hyper 212 Plus, which will allow you to install two fans at the same time). There are rubber shock-absorbing pads stuck to the corners of Hyper 212 Plus fan. TRUE Spirit cooler uses special silicone strips that are stuck to the heatsink that serve the same purpose. As for Hyper N620, its fans are attached with two long screws at the top and silicone mounts at the bottom of the heatsink:

I didn’t make a mistake, when I said “fans” in reference to Hyper N620, because the major peculiarity of this cooler is that its heatsink is equipped with two fans working for air intake and exhaust, while the other two coolers only come with one fan:

Moreover, as you can see, the fans on Cooler Master Hyper N620 are shifted away from one another (since the heatsink is wide enough to allow this). As you may remember, the fans on Hyper N520 reviewed earlier were installed exactly the same way. In fact, I don’t quite understand why with two 120 mm fans used simultaneously, the Hyper N620 heatsink is only 51 mm thick? Taking into account the static pressure of 4.43 mmH2O and airflow of 83.6 CFM created by these two fans, the heatsink could easily be made a few cm bigger, which could increase its surface size dramatically and thus improve the cooling efficiency a lot. As for the size, it is no longer scary to anyone these days.

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