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Cooljag CJC66IC-A Copper Pentium 4 Heatsink Review
Cooljag CJC66IC-A Copper Pentium 4 Heatsink Review
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: Closer Examination of the Heatsink

Cooljag CJC66IC-A Heatsink From All Angles

Heatsink Top:
The Cooljag JC66IC-A is a two part cooler, with the top half consisting of the fan, clip mechanism, and aluminum fan shroud. The bottom half consists of just the heatsink body itself. There is no fan grill to protect the 6000RPM fan impeller from stray wires, and there really ought to be. One close encounter with a molex power connector could nick a blade causing imbalance, and vibrations thereafter. The fan connects to standard 3-pin fan header on the motherboard, and supports RPM monitoring.

Top: Normally, looking at the leading edge of series of skived copper fins is pretty borring. In this case, the fact that we can see right through the entire heatsink is worth noting - seeing as exhaust air is likely to pass through these same passages just as easily. The copper skived fins are 0.6mm thick, and spaced 2mm apart.

Side A:
From the side it is possible to see how whole heatsink is constructed. The aluminum fan shroud and clipping mechanisms one piece, and the copper heatsink is the second half. Once the heatsink is dropped into the plastic heatsink retention mechanism, locking in the other half of the CJC66IC-A is pretty straight forward. The fan measures 10mm thick, 70mm wide, and spins at between 1300-6000RPM. The milled area in the base is 17mm wide.

Side B:
Using spring-loaded clips, the fan shroud locks into the HSRM easily, and firmly holds it in place. The copper base measures 5mm thick, and there are approximately 39 fins.

Heatsink Base:

The central copper portion of the base measures 37mm x 69mm. The four cutout areas help to allow exhaust airflow down into the area below the heatsink itself. The base finish is extremely flat, and smooth.

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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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