The Xigmatek Dark Knight Night Hawk Edition
Figure 4 illustrates the front of the heatsink. Notice that all parts of the heatsink, including fins, base and heatpipes, are covered by the matte black coating.
Figure 5 reveals the side of the cooler. The fins are folded at the side, creating a partially closed surface.
In Figure 6, you can see the top of the cooler. The fins have recesses at the four sides, creating concave areas on the heatsink.