The Thermaltake SlimX3
In Figure 4, you see the front of the cooler. It is only 36 mm high, due to the slim fan and the tiny fins.
In Figure 5, you can see the side of the cooler.
In Figure 6, you check the cooler rear side. Here you can see the heatpipes.
In Figure 7, you can see the top of the cooler, where almost only the fan is visible.