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Zalman CNPS7000A-Cu Socket A/478/754 Heatsink Review
Zalman CNPS7000A-Cu Socket A/478/754 Heatsink Review
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Abstract: Zalman's heatsinks have become well known to consumers looking for low-noise cooling accessories.

 Company link  Category  Published  Author 
Zalman   Cooling / Heatsinks   Jan 03, 2004   Max Page  
Home > Reviews > Page Title: Surface Roughness Comparison

Surface Roughness Comparator:

Surface finish is an important factor that we all look for when holding a new heatsink. Flipping a cooler over to see how well the base has been machined is a quick way to judge the attention to detail that was put into making it. The following FrostyTech Surface Roughness Comparator offers a concise cross section common machine surface finishes. Not every heatsink base will fit into the envelope of this gage, but it does offer a very handy set of representations.

This commercially available gage has 22 machined surfaces from 2 to 500 microinches; Lapped (2, 4, and 8 µ" RA), Ground (8, 16, 32, and 63 µ" RA), Blanchard Ground (16 and 32 µ" RA), Shape Turned (32, 63, 125, 250, and 500 µ" RA), Profiled (63, 125, 250, and 500 µ" RA), and Milled (63, 125, 250, and 500 µ" RA).

FrostyTech Surface Roughness Comparator
2L 4L 8L 8G 16G 16BL 32G 32BL 32ST 63G 63M 63P 63ST 125M 125P 125ST 250M 250P 250ST 500M 500P 500ST

The base of a heatsink plays an important role in how well the cooling apparatus interfaces with the processor. Poor surface roughness will affect a good heatsink just as much as a good surface finish will improve thermal conductivity. In an effort to put a more quantitative spin on the comments we provide about base finishes, FrostyTech has begun using a Surface Roughness Comparator.

Move your mouse over the image above to see an example at right. Numbers are in Microinches, and finishes from 2 microinches to 32 microinches are excellent-to-good.

Evaluation Notes:

The Zalman CNPS7000A-Cu heatsink had a surface roughness of approximately 8M, which is very good. Move your mouse over the tabs above and look at 8L for an approximate example of what this surface finish looks like.



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Table of Contents:

 1:  Zalman CNPS7000A-Cu Socket A/478/754 Heatsink Review
 2:  Closer Examination of the Heatsink
 3:  Heatsink Thermal/Acoustic Test Parameters
 4: — Surface Roughness Comparison
 5:  Acoustical Test Results
 6:  Socket A Temperature Test Results
 7:  Socket 478 Temperature Test Results

List all Zalman heat sinks that Frostytech tested?

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