Heatsink Top:

The body of this Asus heatsink employes a couple of firsts we have never seen used on a cooler. For starters, the interlocking copper fins are soldered to the side of the central copper base. That copper base is chrome plated, and in the shape of a star. The central square copper section measures 28mm x 28mm. Each arm is about 2 x 27mm in size, and to these are soldered the interlocking copper fins.

Side A:
Each section of interlocking copper fins is configured so that exhaust air leaves the Asus Crux P4 XB7N from the side. On the long side of the heatsink these sections are 50 x 17mm in size. On the short side, 44 x 17mm. The clips to hold the Crux heatsink in place rest on two side channels.

Side B:
The same kind of set up is used on all four sides of the Crux heatsink.

The base is a small square of copper, and comes with a pre-applied coating of white thermal compound. Exhaust air from the fan is able to exit from the bottom, or through the sides of the heatsink. Each of the interlocking copper fins measures 0.2mm thick, and 26 x 25mm in size. The surface finish of the base is pretty flat, and fairly smooth.