CB0315U17 From All Angles

The Power Logic fan produced an interesting affect when working on the CB0315U17 heatsink. The noise signature would pulsate in an uneven fashion. We don't have a concrete explanation for this, but it may be do to back pressure issues. In any event the fan is attached to the copper fan shroud which keeps the fan about 6mm above the tips of the fins. The fan draws power via a three-pin motherboard fan header which supports RPM monitoring.

Top: The fins in this heatsink are punched out separately and then brazed to the base. They are not interlocking and so the appearance is not as finished looking as other manufacturers are able to produce. The copper is thin, perhaps 0.1mm thick, but because of the mounting, doubled up on each side by adjacent fins. Fins are spaced 1.25mm apart and are 25mm in height.

Heatsink Base:

The base appears really rounded off, and un flat at first glance. On closer testing we found that the base was indeed flat over the area where it makes contact with the AMD processor so all should be good. Since the surface has been polished it is nice and shiny - however it is still a good idea to use thermal paste for the bond between the CPU core and base of the heatsink.