Articles: Cooling

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Design and Functionality

The cooler looks like a common tower cooler measuring 161x139x100 mm and weighing 900 g:


In fact, it consists of two parts: a heatsink and a fan in a plastic frame on the front side of the heatsink:


I have to admit that ARCTIC Freezer i30 looks pretty common. Its heatsink consists of 48 aluminum fins 0.5 mm thick pressed against the copper heatpipes with 2 mm gaps between them:


The fins on the sides of the heatsink are bent towards the bottom of it and this ay seal the sides completely directing the entire airflow from the fan towards the heatpipes and the heatsink body:

There are no optimizations of any kind at the air intake side of the heatsink: the fins have no profile or shape modifications, which could lower the airflow resistance. We dare suppose that a heatsink like that will lose a lot of efficiency once the fan rotation speed slows down, especially since the latter is of standard 25 mm width and is not one of those high-speed and powerful models.

There is a triangle cut-out in the find on the air exhaust side of the heatsink, which seems to be intended mostly to reduce the heatsink weight rather than optimize the airflow r improve the cooling efficiency:


There are four heatpipes in ARCTIC Freezer i30. They are 8 mm in diameter and are slightly shifted away from one another inside the heatsink body:

The heatpipes are densely packed in the base creating an almost uninterrupted base surface:

Nevertheless, the thermal imprint test with an LGA 2011 processor shows that there still are one-millimeter gaps between the heatpipes and the aluminum plate son the sides:


The base surface is very even, it provides good contact almost over the entire processor heat-spreader surface.

ARCTIC Freezer i30 comes with a single 120 mm ARCTIC F12 PWM fan installed in a plastic frame:

We have already reviewed this fan model two years ago and back then it made a very mixed impression compared with the competition. Its rotation speed can be adjusted automatically using PWM method in the interval from 400 to 1350 RPM. The airflow should reach 74 CFM at the maximum fan rotation speed and the level of generated noise shouldn’t exceed 0.3 Sone.

The fan is built with a fluid dynamic bearing inside. Although its MTBF is not mentioned in the official technical specifications, we assume that it should last at least during the cooler 6-year warranty period without any problems. The maximum power consumption of the ARCTIC F12 PWM fan at 0.22 A current shouldn’t exceed 2.7 W.

To reduce the vibrations and improve the cooler’s acoustic performance there are 2 mm silicone washers glued to the corners of the fan, where it touches the heatsink:

The fan is fastened to the frame with four screws.

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