Articles: Cooling

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Design and Functionality

Before we start I have to apologize that the cooler doesn’t look new anymore, since it got to us after being tested by a few other reviewers, who may have been not very nice to it.

GlacialTech Alaska is a tower cooler that measures 130x101x156 mm and weighs only 740 g. I have to stress that this cooler is really lightweight for its size and it also feels much lighter than its counterparts.

Like in any other cooler, the major part of GlacialTech Alaska is its heatsink. It is of really unique design and hasn’t been cloned from some other product, like it often happens these days:



Alaska heatsink combines several different technologies. First, it uses the so-called honeycomb structure, when the heatsink fins contact one another forming individual cells which let the airflow glide through much faster than it would along parallel plates. We have already seen a similar heatsink in Cool Age X120TF cooler. Besides, the edges of heatsink plates are of variable height, are connected in pairs, and as a result, the inter-plate gap varies from 1.5 to 3 mm:




Secondly, all heatsink plates are perforated with a lot of round holes with approximately 1.5 mm diameter. The combination of these holes as well as honeycomb cells created by the plate edges allowed GlacialTech to call their Alaska heatsink “a breathing heatsink”. All these unique features should speed up the heat transfer from the cooler and increase its overall efficiency. Here I would also like to add that the aluminum heatsink plates pressed against the heatpipes are 0.5 mm thick. The calculated effective heatsink surface is quite big for today’s standards and equals 8,440 cm2.

The third peculiarity of the GlacialTech Alaska heatsink is non-linear heatpipes layout inside the heatsink array:

All six heatpipes in two groups (three heatpipes in each) are laid out at a different distance from the center of the heatsink and are shifted away from one another. It looks like they create a sort of a wedge with its top at the central axis of the base. It must have been done to ensure more even heat distribution over the heatsink body.

The heatpipes are put inside special grooves cut out in the copper base and soldered to it:

The base surface is very even, but it could have been finished better:

Here are the thermal paste imprints of our GlacialTech Alaska cooler we got off the AMD CPU:


And these are from an LGA1366 processor:


The first imprint (AMD) is a little smeared, because in order to safely remove the cooler it needs to be rotated slightly. The second imprint (Intel) is uneven because of the convex-shaped CPU heat-spreader.

GlacialTech Alaska is equipped with one seven-blade 120x120x25 mm fan:


Fan frame and impeller are semi-transparent. The blades have very aggressive angle of attack, thick rounded edges and get wider towards the end:

The fan impeller measures 112 mm in diameter and sits on three straight spokes 4 mm wide and one 8-mm spoke. The fan rotation speed is PWM controlled in the interval between 700 and 1600 RPM. The fan generates 55.7 CFM airflow at maximum speed and produces 30 dBA of noise. The static pressure is not mentioned in the fan specifications.

The fan rotor is 41 mm in diameter covered with a round film sticker:

The fan uses a slide bearing with prolonged MTBF of 50,000 hours or more than 5.7 years. According to the specifications, the maximum fan power consumption shouldn’t exceed 4.2 W, but we only detected 1.8 W during our tests. The startup voltage is declared at 4.9 V. The fan comes with a 300 mm long four-pin cable.

The fan is attached to the heatsink with two wire clips. One end f this clip goes into the holes in the heatsink, while the other – into the holes on the fan:

There are no shock-absorbing pads or strips of any kind between the heatsink and the fan. GlacialTech Alaska comes with an extra pair of clips in case you decided to install a second fan of the same size.

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