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Base Finish and Flatness Flipping a heatsink over to inspect the business end is often a simple indicator of overall cooler quality. More practically speaking, a heatsink is in many ways only as effective as the contact it makes with the processor - the flatter and smoother the better. Base finish is one of the criteria that Frostytech measure in the course of evaluating heatsinks, and it involves two distinct aspects. Surface Finish is the first; this is calculated with the aid of Surface Roughness Comparator that has a cross section of common machine surface finishes and their numerical surface roughness equivalents in microinches. The second is Surface Flatness. This is tested with an engineer's straight edge or proven flat surface, in two axes. ID-Cooling's SE-214X heatsink has an exposed heatpipe base. The base has a machined surface finish. Surface roughness is lower than than ~64 microinches. The base is flat in the axis parallel to the direction of heatpipes and in the other axis one edge of each heatpipe is very slightly higher than the opposite. Sound level measurements are coming up next on Frostytech...
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