The Titan Hati
In Figure 4, you see the front of the heatsink. It uses a very popular design, with three U-shaped copper heatpipes.
In Figure 5, you can see the side of the heatsink. Even though it has three heatpipes, the heatsink is quite narrow. The tips of the fins are folded, so the side surface is closed: this creates an air tunnel inside the heatsink.
In Figure 6, you check the top of the heatsink. Note how the fins are not rectangular. We can also see the fan mounting spaces, and the cooler support fans at both sides.