The edges of all plates are slightly bent downwards, which helps direct the airflow towards the mainboard PCB, according to the manufacturer. This way, it also cools the power elements in the area around the CPU socket. Note also that there are a few pairs of elongated holes in each heatsink plate in the way of the fan airflow. It is fairly hard to tell what they stand for. I dare suppose that this way engineers were trying to lower the noise generated by the fan at its maximum rotation speed.
The heatpipes are soldered to the grooves in the cooler base plate. They are also topped with a retention plate:
The base is very well finished. It is extremely even, although there is no mirror-shining polishing on its surface:
As I have already said, the base is very even: the thermal compound imprint from the evened out processor heat-spreader was nearly ideal:
ASUS Lion Square is equipped with a seven-blade 92 x 92 x 25 mm fan made by SUNON Inc.:
MagLev KDE1209PTVX fan model uses a so-called “Vapo” bearing. In reality, it is a type of slide bearing with longer life span (due to longer lasting materials used). The fan rotation speed can be adjusted using pulse-width modulation algorithm (PWM) between ~800 (according to the monitoring data) and ~2300 RPM. The cooler specifications, however, say that ASUS Lion Square shouldn’t be noisier than 18 dBA. These must be the readings taken at the minimal fan rotation speed, or the actual measuring methodology is truly “unique”. The fan is equipped with four blue LEDs.