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Cooljag CJC66IC-A Copper Pentium 4 Heatsink Review
Cooljag CJC66IC-A Copper Pentium 4 Heatsink Review
  71%   
Abstract: CJC66IC-A heatsink does not reveal itself until the fans' intake air reaches elevated temperatures, and once that happens, the full speed of the fan kicks in.

 Manufacturer  Category  Published  Author 
Cooljag   Cooling / Heatsinks   Dec 15, 2003   Max Page  

Home > Reviews > Page: Acoustical and Surface Roughness Tests

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
2L4L8L8G16G16BL32G32BL32ST63G63M63P63ST125M125P125ST250M250P250ST500M500P500ST

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 CoolJag CJC66IC-A heatsink had a surface roughness of approximately 4M, so it is well within the acceptable range of surface finishes. A finish of 4M is not given on this example guage, but one of 4L roughly approximates the degree of very subtle surface irregularities found.

Acoustic Samples: Listen to this Heatsink!

Under the lower speed settings the fan rotates at about 1300RPM, which is virtually silent for all intensive purposes in a PC. Once the Cooljag CJC66IC-A kicks up to full speed, it becomes very loud and would easily be heard outside the PC case. Given there isn't much point of recording a silent noise signature under room temperature conditions, we have simply recorded the full-speed noise output of the Cooljag CJC66IC-A. To listen to this heatsink for yourself in operation, be sure to click on the little headphones icon below and download the Acoustic Sample MP3 file.

(high) FrostyTech Acoustic Sampling Chamber

Standard Waveform view of a 10 second recording. Click on the headphones to listen to an MP3 recording of this heatsink in operation.
Listen to this Heatsink now.

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. Measurements are made on the dB (A) scale.

FrostyTech Sound Level Results
- Manufacturer Model Noise Level Scale
TS Heatronics NCU-1000 passive N/A
CoolJag (low) CJC66IC-A 30.0 dB Quiet
Verax P16 35.3 dB
Spire SP420B8 40.2 dB
Zalman CNPS7000-Cu 41.7 dB
ArcticCooling SuperSilent4 Pro 41.8 dB
Zalman CNPS6500-AlCu 47.4/28.9 dB
Zalman CNPS7000A-Cu 42.2 dB
Intel Socket 478 42.5 dB
CoolJag JVC661A 43.9 dB
Arkua 8456X-8T 46.5 dB
Evercool NW9F715CA 47.3 dB
Intel Stock 3.06GHz 47.5 dB
Aopen ACP4LC 48.7 dB
Arkua Q85X-7J 49.0 dB
Arkua 848X-6B 49.3 dB
Taisol CEP426151A 50.7 dB
Scythe Kamakaze 51.0 dB
Arkua 838T-7G 51.7 dB
JMC 401100 53.0 dB
Dynatron DC1207BMW 53.0 dB
Spire SP411C5 53.2 dB
Dynatron DC1207BMY 53.2 dB
Dynatron DC1207BMX 53.4 dB
Thermal Integration (high) TI-V7035TN 53.6 dB
Zalman CNPS5700D-Cu 53.8 dB
Globalwin VA476 54.2 dB
Dynatron DC1206BMV 55.1 dB
AVC 117140 56.1 dB
Taisol CEP447181 56.8 dB
Taisol CCP445172 57.5 dB
Cooljag (high) CJC66IC-A 59.1 dB
Dynatron DC1U-B02 62.2 dB
Coolermaster IHC-H71 64.4 dB
Thermalright (high) SLK-900U 67.2 dB louder

If your PC already runs cool, congratulations, the Cooljag CJC66IC-A offers a great low-noise cooling option. However, once that thermistor kicks up the fan's RPM, things get quite noisy. Up next, the thermal results!

 Previous Page ° ° Next Page 

Table of Contents:

 1:  Cooljag CJC66IC-A Copper Pentium 4 Heatsink Review
 2:  Closer Examination of the Heatsink
 3:  Heatsink Thermal/Acoustic Test Parameters
 4: — Acoustical and Surface Roughness Tests
 5:  Final Temperature Results

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