The Noctua NH-U9B SE2
Figure 4 illustrates the front of the heatsink, which carries the high constructive quality we are accustomed to seeing on all Noctua coolers.
igure 5 reveals the side of the cooler. Part of the fins is bent, making a partially closed surface.
In Figure 6, you can see the top of the cooler. The fins are almost rectangular, and the tips of the heatpipes are exposed.
Figure 7 shows how the heatpipes are distributed in the base.