Articles: Cooling

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Design and Functionality

The most remarkable part of Titan Fenrir Siberia Edition cooler is certainly its heatsink. This is what we are going to start with:


True, the newcomer’s heatsink looks very unusual, as it consists of two individual fin arrays positioned at a 90-degree angle to one another. One of them is positioned vertically (as a regular tower) and another one – perpendicular to it:


At the same time I have to point out that both arrays are identical in size and shape. Each of them consists of 38 aluminum fins 0.4 mm thick that are pressed against the heatpipes at 2.2 mm distance from one another. The sides of the fins are bent creating sort of a tunnel and concentrating the airflow around the heatpipes and fins.

The heatsink weighs 775 grams, which is not too much, according to today’s standards in the super-cooler as well as in regular cooler segment. The total effective surface size is also relatively small – 7,400cm2, which is quite modest. However, the overall heatsink size is 200x130x162 mm.


Titan Fenrir Siberia Edition is built on five copper heatpipes 8 mm in diameter that go through the copper base plate and evenly pierce each of the heatsink arrays:

Regretfully, we have to admit that the heatsink fins are simply pressed against the heatpipes: there are no traces of thermal glue or soldering:

The same is true of the base: we didn’t see any soldering traces there, either, so we dare assume that they use some kind of thermal glue there. Unfortunately, this is the least efficient contacting method.

The base of 45x40 mm large and is exceptionally finished, although not polished at all:

It is impeccably even and the thermal paste imprints came out decent:


Titan Fenrir Siberia Edition is equipped with two Kukri fans: TFD-14025H12ZP/KU (RB) and TFD-12025H12ZP/KU (RB) models. They have 11 long sickle-shaped blades:

The marking indicates clearly that one of the fans is 140x140x25 mm big, and another – 120x120x25 mm big. Both fans support PWM rotation speed adjustment in the following intervals: 700-1800 RPM for the 140 mm model and 800-2200 RPM for the 120 mm model. Both fans use an enhanced sleeve bearing with threading inside (referred to as Z-axis by Titan). It should last 60,000 hours or over 6.8 years, which is twice as much as what a conventional sleeve bearing is capable of. The four-pin cables are 375 mm long.

The electrical specifications of the fans are very similar. For example, their maximum power consumption shouldn’t exceed 4.8 W for the 140 mm fan and 3.84 W for the 120 mm fan:


Other specifications of the Kukri fans are provided in our technical specifications summary table below. Here I would only like to add that each of the fans is attached to the heatsink with a pair of wire clips, which catch on to the special retention holes in the fan frames and then to the grooves in the heatsink:

For vibration absorption you should use short silicone strips inserted into the grooves in the heatsink:

The large 140 mm fan goes onto the horizontal heatsink array and it will be directly the airflow towards voltage regulator components around the CPU socket, the chipset and the memory DIMMs:

As for the 120 mm fan, it is installed on the external side of the vertical heatsink array directing the airflow away from the heatsink. In other words, it will be “sucking out” the hot air from the heatsink, where it is sent by the horizontal fan. We got the feeling that Titan Fenrir Siberia Edition developers were mostly concerned with cooling the components around the CPU socket rather than with cooling the actual CPU. This approach has never been a winning one: the CPU wasn’t cooled properly and there was really not much benefit from cooling the around-the-socket components. But what if Titan engineers managed to work wonders this time? Well, we are going to find out shortly, and in the meanwhile, let’s see how easily we will be able to mount Titan Fenrir Siberia Edition onto a mainboard.

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