Articles: Cooling

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Design and Functionality

The Accelero XTREME 5970 follows Arctic Cooling's traditional design guidelines. There are longitudinal heat pipes, a large aluminum heatsink consisting of two halves, and three fans in a plastic frame to blow at the whole arrangement.



The cooler measures 290x104x58 millimeters and weighs 692 grams. Thermal grease (Arctic Cooling MX-2) is already applied to the two copper bases.

To have a closer look at the cooler’s heatsink, we had to remove the plastic casing with fans as well as the aluminum plate with heatsink which was attached to the bases.

The heatsink consists of 119 aluminum fins, 0.4 millimeters thick and 1.9 millimeters apart from each other. The fins are grouped into three sections of similar width.


There are a total of eight heat pipes, 6 millimeters in diameter, so each GPU has four of them. The left and medium sections of the heatsink are pierced by four heat pipes and the right section, by eight pipes in two rows.


Thus, each GPU is cooled by the same number of heat pipes and has the same share of the heatsink for itself. The heat pipes are connected to the copper bases by means of soldering. The fins seem to be press-fitted on the heat pipes.

Three white 92mm fan impellers are installed on the black plastic frame.

Hanging on four pins, each impeller has 11 sharp blades and a small sticker on the rotor.

The fans are connected to the 4-pin plug on the PCB of the Radeon HD 5970 and are PWM-controlled in a speed range of 900 to 2000 RPM. The combined airflow of the fans is specified to be 81 CFM. The level of noise at the maximum speed of 2000 RPM is declared to be no higher than 0.5 sones. For comparison, the manufacturer says that the default blower of the reference Radeon HD 5970 cooler produces 3.5 sones of noise at 2000 RPM, which is 7 times as high. The maximum power draw of one fan is 2 watts. The manufacturer does not specify the service life of the fluid dynamic bearings of the Accelero XTREME 5970 but if one of its fans fails after 5 years and 11 months of cooling your Radeon HD 5970, you will be able to contact Arctic Cooling’s support because the company offers a 6-year warranty for this and other products it manufactures.

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