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HEATPIPE ASSEMBLY
Next, the heatpipes were examined and cleaned with alcohol. The appropriate length/shape ones were placed in the grooved blocks, then covered and clamped as shown above. The screws were not fully tightened at this point.
The ends which mate with the heatsink panels (the condensor ends) fit into grooved aluminum blocks, with TIM on both sides of the blocks.
Metal covers are clamped over the condenser blocks with a single screw; the bottom edge of the cover fits into a groove along the bottom edge of the heatsink. Tightening the screw applies even tension on the block. All the screws for all the evaporator block covers were tightened at this point.
Initially, the condensor ends of all the heatpipes were positioned so that they were more or less horizontal. After initial tests, the CPU condensor ends were repositioned to point up a bit, as shown above. This little change effected a 15°C drop in CPU temperature under load. The condensor ends for the NB chip could not be moved much beyond horizontal due to clamp positioning issues. |
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