The specs on the GlobalWin fan are scarce, but we do know it puts out a lot of air, and is very noisy. Dual ball bearings help ensure the fan lasts a long time. The fan itself measures 60mm x 60mm x 25mm.

The fan cools very well on this and even on other heatsinks but as we mentioned it's rather loud. If your case is heavy and tucked away behind a desk it shouldn't be too much of a problem however.

This image gives a better perspective of the curves in the extrusion. Both the base and the height of the fins have been manipulated to influence better cooling ability. The varying height of the base helps transfer heat along the length of the heatsink and the differing height of the fins helps focus airflow along the center-line of the heatsink.

The base is about 8mm thick and rises up to 13mm at the center. Overall this is one of the thickest bases we've seen on an extruded heatsink in some time.

Removing the fan for a moment it's a bit easier to see the two side cuts in the WBK-38. The cuts are made so that a wire can pass through the fins to hold the fan on.

The clip is very stiff and the thumb-hold quite small. It is a bit difficult to clip the WBK-38 on the socket but by no means impossible.

As with many extruded heatsinks these days the base has not been milled flat, but rather brushed. The process is more cosmetic than precise, and the WBK-38 shows slight sign of bowing out at the base. The angle of bow is very broad so this should have no real effect on the interface between the aluminum and the silicon, but using thermal goo is advisable.

For our tests we removed the pink thermal interface material.