The Fans:
ChoLiang use PowerLogic fans on all the heatsinks we have tested from them up to this point. These fans aren't quite the brand of YSTech or Delta, but so far they have proven to be pretty decent performers. Given the noise levels this heatsink creates I would guess that the fan uses at least one sleeve bearing in addition to a ball bearing. The fan supports RPM monitoring and connects via a standard 3-pin motherboard fan header.

Bare Heatsink:
Note the three holes around the outside of the center core. This part of the heatsink is actually a separate component, so the thermal interface between these two points will be of great interest to us, and reflect directly on how this heatsink performs under a thermal load. The pegs are about 2mm square.

Side B:
The retention assembly Cho-Liang use is pretty simple, and easy to work with. The only think I could comment on is that the little clips which grab the HSRM should be bent up a bit more for a firmer grip. The red box you see is the fan shroud.