The Fans:
The fan assembly consists of the fan, and the mechanism used to hold the heatsink and fan in place on the motherboard. The 8568 uses a 4500RPM 70mm fan that produces about 54 dB of noise. The fan connects to the motherboard fan header via a 3-pin connector which also supports RPM monitoring.

Bare Heatsink:

The core of the 8568 is actually cut away a bit so that the copper slug is less than the full height of the heatsink. The plastic fan mounting assembly contains all the necessary springs to hold the heatsink under tension on the socket. The clip force is centered on the copper slug at the center of the heatsink. Each of the aluminum fins is scalloped to ensure good surface turbulence, and improved heat transfer. Fins are spaced 2-2.5mm apart and are typically 1mm thick.

Side B:
From this side you can see the little armature which is used to put the entire assembly under tension. In the down (locked) position shown here the heatsink is under pressure, during installation it should be in the up position. The 36mm tall fins are spaced about 2.5mm apart and are slightly tapered off to the corners.