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Cooljag CJC66IC-A Copper Pentium 4 Heatsink Review
Cooljag CJC66IC-A Copper Pentium 4 Heatsink Review
Overall Rating:   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.

 Company link     Category     Published     Author    
Cooljag   $$ Price It! ££ Cooling / Heatsinks   Dec 15, 2003   Max Page  


Cooljag CJC66IC-A Copper Pentium 4 Heatsink Review


The secret of the Cooljag 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 and rapidly adds extra airflow to cool the copper skived fins below.

With the aid of a thermistor sticking out the side of the fans' motor, the Everflow fan can ramp up in speed from a whisper-quiet 1300RPM to a rather loud 6000RPM. At full blast, vibration can start to be an issue.

The fully copper skived heatsink features fins of 0.6mm thickness, on a 2mm pitch, but what really makes the CoolJag CJC66IC-A stand out is the copper base. Machined in four places are relief cuts which have removed a 17mm x 26mm swath in each of the four corners. The reason for this?

Heatsink Specsheet:
  • Model: CJC66ICA
  • HS Material: Skived Copper, C1020 Copper
  • Fan: Everflow, 1300-6000 RPM, 12V, 0.40A
  • Fan Dim: 15x70x70mm
  • FHS Dimensions: 55x83x69mm
  • Weight: 586 grams
  • Made by: Cooljag
Sold By: www.cooljag.com
Heatsink Audio Sample Included.

The cuts in the copper base not only lighten the load of the entire 586g heatsink, but also help to promote some airflow down into the area below the heatsink itself - further cooling the processor below to some degree.

The 5mm thick copper base still has enough material to fully contact the heatspreader of the Pentium 4 processor, and the cuts are unlikely to cause any structural difficulties.

° Next Page 

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

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Time stamped: 9:10AM, 07.26.2014



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