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

 Manufacturer  Category  Published  Author 
Zalman   Cooling / Heatsinks   Jan 03, 2004   Max Page  

Home > Reviews > Page: Closer Examination of the Heatsink
Zalman CNPS7000A-Cu Heatsink From All Angles
The Fan:
The fan Zalman use with the CNPS7000A-Cu is 84mm in diameter, and about 25mm tall. Rotating at 2400RPM, the fan moves air without creating a lot of noise. The fan connects via a standard three pin motherboard header which supports RPM monitoring. Zalman's Fanmate 1 can be used to further decrease the speed of motor for even quieter operation if desired. Decreasing the speed of the fan will impact on the heatsinks performance by a certain degree since less air is moving over the copper fins.

Heatsink Top:
With the fan and spring clip mechanism removed we can see the CNPS7000A-Cu for all it is worth. The entire heatsink is made from an assembly of individually punched out sheets of 0.4mm thick copper, the assembly is then squeezed together under high pressure and bolted tight. The central base section is ~26mm wide, and from tip to tip the heatsink measures approx. 110mm x 110mm. It looks circular, but is more oval shaped really. The cut out in the center of the base section is for the clipping mechanism which applies pressure at the center of the heatsink.

Side A:
From this side we can see just how the copper fins gradually come together to form the body of the heatsink itself. Compressed under high pressure the fins come into perfect contact at the base which is then machined absolutely flat and smooth. The bevel in the shape of the heatsink is so it will clear the HSRM, and any capacitors placed near to the socket.

Side B:
Standing 62mm high, the CNPS7000A-Cu is fairly compact all things considered. Most heatsinks have the fan mounted on top of the fins which can raise the overall height of a cooler to well over 80mm. The copper fins are spaced about 1mm apart at the outside edges. The spring clipping system is mounted to the heatsink in such a way that there is no chance of play.

Heatsink Base:

If you ever wanted to see the example of a perfect heatsink base finish look no further than the Zalman CNPS7000A-Cu... Milled perfectly flat, there are no machining marks visible - the surface is very flat and smooth, but not polished. The little aluminum blocks are used during the compression process to help apply even pressure, and for the mounting hardware to attach to. With a base finish of this calibre, only a very small amount of good quality thermal compound is necessary. Also note the two sets of holes in each side of the mounting clip, the inside holes are for a P4 mounting system, and the outside for Athlon64/AthlonXP.

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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

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