Arctic Cooling Freezer Xtreme has a 120 x 120 x 25 mm fan in a round frame:
Look at the interesting shape of the fan blades: they are in fact bi-directional. It means that the fan should be equally efficient taking air flow in and exhausting it out. However, it isn’t the case for traditional 120-mm fans that work better for air intake. Considering the cooler heatsink design, using a fan of this type is absolutely justified and logical, because it has to create airflow cooling both parts of the heatsink. The fan rotation speed is adjusted using PWM method from ~500 to ~1500 RPM. It creates 35.7 – 60.7 CFM airflow and generates 17 – 21 dBA of noise respectively.
The copper base plate has special grooves for the cooler heatpipes that are soldered to it, just like ASUS Lion Square. However, the thermal interface is pre-applied to the cooler base:
Arctic Cooling solutions use highly efficient Arctic MX-2 thermal compound, which is at least as good as Arctic Silver 5 that I am constantly using in my tests:
The finish quality on the cooler base is typical of Arctic Cooling solutions: no polishing, but also nothing to actually pick on:
The copper base surface is very even. There were no gaps on the thermal compound imprints from the processor heat-spreader obtained with Arctic Silver and MX-2 interfaces, although I have to admit that the manufacturer pre-applied too much paste: