The Coolermaster uses 60x60x10mm Delta fan to move air down into the 29mm high fins. The fan plugs directly into the motherboard and has a third wire for RPM monitoring in the event of failure of slowdown.

With the fan removed you can see how the clip slot cuts a bit path right through the center of the coolermaster heatsink. The clip slot is 7mm wide, and incidentally the clip is very stiff to engage.

I'm not sure if 1mm thick metal on a clip is normal, but it seems overly tight to engage. Since you need a screwdriver to remove it,it can be a bit inconvenient.

Looking from the side of the heatsink it's easier to see the 29mm high fins which are spaced 2mm apart. H'mm seems like just about every heatsink we look at these days has their fins spaced 2mm apart - must the be the optimal spacing.

The fins range in width from 1.15mm to 0.75mm. The slight taper no doubt helps to improve airflow over the fins. The base is 6mm thick, and notched to fit over the socket cam.

The base of the heatsink is just the raw extrusion surface. As we would expect, the base is slightly domed inward. The angle is fairly obtuse, but so long as the thermal pad is used it shouldn't have much of an impact on the proper seating of a core.

The surface is smooth for a raw extrusion, and not deep markings are immediately obvious.