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Zalman CNPS6500B-Cu Pentium 4 Heatsink Review
Zalman CNPS6500B-Cu Pentium 4 Heatsink Review
Abstract: With the CNPS6500B revision Zalman have changed around how the heatsink mounts to the Intel Pentium 4 processor.

 Manufacturer  Category  Published  Author 
Zalman   Cooling / Heatsinks   Sep 05, 2002   Max Page  

Home > Reviews > Page: Checking out the heatsink
CNPS6500B-Cu Heatsink From All Angles

The Fans:

There are 52 fins in total on the CNPS6500B-Cu model, and each fin is about 53x68x0.5mm in size. Altogether the heatsink weighs in at 898 grams, making it one of the heaviest heatsinks out there. At the circumference of the fins, the tips are spaced roughly 2mm apart for good airflow. The use of full copper fins means heat is spread up from the core quickly and out to the outer edges of the fan heatsink.

Side A:
From this side, you can really see how Zalman put the massive heatsink together out of a lot other smaller parts. Zalman actually has a series of patents on this technology which is simple and very effective. The central copper section (26mm wide) means the processors heatspreader makes good contact with highly conductive copper fins.

Side B:
To improve circulation, and increase surface area, Zalman have perforated the fins with five 3mm x 41mm slots. A few creeses have been added to the copper fins to help make them a bit more rigid, and the tops have also been scalloped. The two bolts which hold the many pieces together are stainless steel, and the side aluminum flanges are used during mounting in the heatsink retention mechanism.

Heatsink Base:

Zalman have always finished their heatsink bases to impeccable standards as far as we're concerned. With the larger 6500 series it is really important not to bang the heatsink down on a hard surface upside down. Since the base is machined so well, only a very small amount of good quality thermal compound should be applied. The entire base area measures 56x83mm.

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Table of Contents:

 1:  Zalman CNPS6500B-Cu Pentium 4 Heatsink Review
 2: — Checking out the heatsink
 3:  Heatsink Test Parameters
 4:  Acoustic Test Results
 5:  Synthetic Thermal Test Results

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