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Zalman CNPS6500B-AlCu Pentium 4 Heatsink Review
Zalman CNPS6500B-AlCu Pentium 4 Heatsink Review
Abstract: With a weight of 400 grams to contend with, the CNPS650BAlCu straps itself into the standard socket 478 heatsink retention mechanism with two blue springy pieces of plastic.

 Manufacturer  Category  Published  Author 
Zalman   Cooling / Heatsinks   Sep 02, 2002   Max Page  

Home > Reviews > Page: Synthetic Thermal Test Results

Synthetic Temperature Test Results: *Ranked according to 100W interface die test results.

FrostyTech Synthetic Temperature Test Platform Results
Mfg. Model Ambient Temp. 27mm large copper block 27mm large copper block Thermal pad No. Fans Fan Noise Clip force
50W 100W
AVC 117140 22.6 37.8 50.4 none 1 med med
Coolermaster IHC-H71 23.0 37.0 51.1 none 1 loud stiff
Arkua 8568 22.4 37.8 51.7 none 1 med med
NengTyi XPC5000 23.8 38.4 53.9 none 1 med loud
Alpha PAL8942 27.9 42.6 54.0 none 1 med med
Vantec GSN-7025 22.5 41.7 58.5 none 1 med med
Glacialtech Igloo 3300 22.4 40.5 58.8 silver 1 low easy
Chauh Choung DTA-478 22.4 42.1 59.0 carbon 1 low med
Taisol CEP426151A 24.3 43.7 59.7 none 1 med easy
Intel Socket 478 22.4 41.8 59.8 carbon 1 low med
Dynatron DC1207BMW 23.2 42.7 61.1 none 1 med easy
Titan TTC-MT3AB 22.8 41.5 61.2 none 2 loud stiff
Dynatron DC1206BM-S 22.4 43.2 62.0 none 1 med med
AVC 117160 22.4 42.7 61.1 white pad 1 med med
Zalman CNPS6500B-AlCu 26.3 42.9 61.3 none 1 low easy
Cho-Liang CL-CB00881 23.6 41.2 65.0 none 1 med easy
Cho-Liang CL-CB0307Z17 24.2 45.6 65.7 none 1 med easy
Cho-Liang CL-CB0094-1A 23.2 39.5 67.9 none 1 med easy
Globalwin VA476 28.7 49.5 68.0 grey 1 med easy
Dynatron DC1206BMV 23.1 45.1 68.2 none 1 low easy
ChoLiang Cl-CB0309Z17 24.3 46.7 68.6 none 1 med stiff
Vantec GSN-7015 22.4 47.5 69.0 none 1 loud stiff
50W 100W

Keep in mind that there are a lot of extra variables involved with the testing of Zalman heatsinks since they use a fan which can be in any number of different orientations. Depending on those orientations the thermal performance of the heatsink can vary, and if you have a good internal case flow that can also add to a performance increase.

Taking into consideration that the CNPS6500Cu is designed to be a low noise quiet cooler these results are pretty good. Generally speaking, quiet heatsinks perform quite poorly when stacked up against everyday performance coolers.

Rise Above Ambient Temp. (c)
Mfg. Model 27mm large copper block 27mm large copper block



Alpha PAL8942 14.7 26.1
AVC 117140 15.2 27.8
Coolermaster IHC-H71 14.0 28.1
Arkua 8568 15.4 29.3
NengTyi XPC5000 14.6 30.1
Zalman CNPS6500B-AlCu 19.5 34.8
Taisol CEP426151A 19.4 35.4
Vantec GSN-7025 19.2 36.0
Glacialtech Igloo 3300 18.1 36.4
chauh Choung DTA-478 19.7 36.6
Intel Socket 478 19.4 37.4
Dynatron DC1207BMW 19.5


Titan TTC-MT3AB 18.7 38.4
Globalwin VA476 20.8 39.3
Dynatron DC1206BM-S 20.8 39.6
AVC 117160 20.3 39.8
Cho-Liang CL-CB00881 18.2 41.4
Cho-Liang Cl-CB0307Z17 21.4 41.5
Cho-Liang CL-CB0309Z17 22.4 44.3
Cho-Liang CL-CB0094-1A 16.3 44.7
Dynatron DC1206BMV 22.0 45.1
Vantec GSN-7105 25.1 46.6



The final rise above ambient temperature results outperform the stock intel heatsink and in general are quite good, even for a regular heatsink. The low noise properties of the Zalman CNPS6500B-AlCu just add to the mix.

Overall we are very pleased with the updated version of the CNPS6500-AlCu which retails for around $40USD, and especially appreciate the new clipping mechanism. Things have changed only slightly from that earlier model, but as there are physical differences the two heatsinks should not be considered identical.

With a beautifully flat base, and a very low noise cooling solution the Zalman heatsink certainly fulfills a lot of criteria with a minimum of fuss. The only possible down sides are if the case you are using has the powersupply located over the processor. If that is the case you will not be able to use this heatsink at all. There just won't be any space for the fan to sit - and it must sit above the heatsink in order for the unit to operate properly.

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Here are a few other articles that you might enjoy as well...

1. NoiseControl Silverado Heatsink Review
2. Zalman CNPS5000-Plus Copper FHS Heatsink
3. Zalman FanMate 1 - Rheostat Review
4. Vantec Stealth Fans

5. Heatsink Fundamentals: Dusty Computers

 Previous Page ° Heat Sink Review Index  

Table of Contents:

 1:  Zalman CNPS6500B-AlCu 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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