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When the CNPS7000-Cu was mounted, it was still sitting kind of loose on the CPU and could be moved / rotated, even slightly tilted without effort. The result was a somewhat insufficient contact between the processor and the cooler, the latter stayed cool all the time while MBM5 reported substantial temperature spikes under load and the system had a tendency to freeze. After removal of the cooler we found that the contact was not uniform. Diluting the heatsink compound to decrease the viscosity and provide an oil film-like consistency ameliorated the situation but still the heatsink itself was wiggling around on the processor. The workaround was to adjust the tension of the clip by bending it slightly more.

      

Two different views of the fannage including mounting clips (Click thumbs for larger images). To increase the tension / mounting pressure, the clip was bent as indicated by the arrow.

      

Installation of the CNPS is very straightforward, just slide the aluminum brackets (or "rods" as opposed to the "nipples" in the manual) into the cut-outs of the standard plastic retention mechanism (left picture) and then fasten the actual retention clip via the supplied screws to the "rods". It could not be much easier than that except that after increasing the tension of the clip by bending it, the screws were a bit too short to insert them without exercising some force. No big problem, though. (Click thumbnails for larger pictures).

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