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Zalman CNPS6500B-Cu Pentium 4 Heatsink Review
Zalman CNPS6500B-Cu Pentium 4 Heatsink Review
  92%   
Abstract: With the CNPS6500B revision Zalman have changed around how the heatsink mounts to the Intel Pentium 4 processor.

 Company link  Category  Published  Author 
Zalman   Cooling / Heatsinks   Sep 05, 2002   Max Page  
Home > Reviews > Page Title: Acoustic Test Results

Acoustic Samples: Listen to this Heatsink

The CNPS6500B-Cu comes with the Zalman Fanmate 1 which allows users to control how fast the 92mm fan rotates, and thus how noisy it is. The first recording is a standard 10 sec bit with the fan connected directly to the power supply. The second recording is of the fan connected via the Fanmate 1, and also illustrates what happens when you turn the dial down so the fan makes less noise. Since all Zalman heatsinks of this series use the same fans, these acoustic tests are all identical.

FrostyTech Acoustic Sampling Chamber (~10 sec)
Listen to this Heatsink now.
Standard Waveform view.
(Listen to an MP3 recording of this heatsink by clicking on the headphones)

You can see the effect visually in the second wave form image, or you can click on the pair of headphones and listen in to each recording separately. Since the Zalman heatsinks all use the same type of fan, each of these recordings applies to all similar flower heatsinks.

Hi to Low Fan Speed Acoustic Sampling Chamber (~10 sec)
Listen to this Heatsink now.
Standard Waveform view.
Sound Level Measurements:

Listening to the actual noise a heatsink makes allows you to hear what pure numbers alone cannot get across. To further emphasize FrostyTech's reliance on cold hard facts when evaluating a heatsink, we also take Decibel readings with a sound level meter. These results may be higher than the manufacturer's listed specs, but then again these are real world measurements.

FrostyTech Sound Level Results
- Manufacturer Model Noise Level Scale
Zalman CNPS6500B-Cu 47.4/28.9 dB quiet
Intel Socket 478 42.5 dB
Cho-Liang CL-CB0094-1A 49.8 dB
Cho-Liang CL-CB00881 50.2 dB
Taisol CEP426151A 50.7 dB
ChoLiang CB0307Z17 52.9 dB
Dynatron DC1207BMW 53.0 dB
Globalwin VA476 54.2 dB
Dynatron DC1206BMV 55.1 dB
ChoLiang CB0309Z17 55.7 dB
AVC 117140 56.1 dB
NengTyi NW6700 58.0 dB
Coolermaster IHC-H71 64.4 dB louder

The split results for the Zalman heatsinks means this; the first measurement of 47.4 dB is of the fan without the FanMate 1 in place, the second measurement of just 28.9 dB is of the fan with the FanMate 1 set to its maximum point.



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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

List all Zalman heat sinks that Frostytech tested?

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