360° View - Scythe Zipang Heatsink Information on Frostytech's test methodology is available here.
The 25x138x138mm fan is held in place on the Scythe Zipang with a pair of springy wire clips. The fan spins at a fixed 1000RPM and is powered by a standard 3-pin fan header. With the fan removed we can see the large array of stacked aluminum fins soldered to the top-half of six copper heatpipes, and threaded over the other end of those same six heatpipes. The nickel plated aluminum fins are 0.3mm thick and spaced 1.5mm apart.
The body of the Scythe Zipang heatsink is 30mm thick. The six 6mm diameter copper heatpipes are soldered along the bottom edge and thread through the center of the fins as well. Below all of this is a rather large extruded aluminum base cap heatsink the heatpipes and copper base are soldered to. The bulk of the Scythe Zipang is elevated 55mm above the base for clearance purposes.
The heavily chrome plated copper base plate on the Scythe Zipang is 6mm thick, and 37.5x37.5mm in area. The screw holes are for attaching the Intel LGA 775/478 and AMD mounting brackets. The copper heatpipes loop around from the base in an 'e' shape to contact the middle and bottom edge of the aluminum cooling fins. Curiously, the heatpipes are kept rather closely packed at the fin level, rather than spreading out to take advantage of the full 145mm width of heatsink fin.