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Globalwin CDK38 Copper Heatsink Review
Globalwin CDK38 Copper Heatsink Review
Abstract: For its fins the Globalwin CDK38 uses sheets of 0.5mm thick copper which have been dip brazed/soldered to the base plate along their edges.

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

Home > Reviews > Page: Close up look at the heatsink

Globalwin CDK38 From All Angles

The Fan: The 60mm black label fan is from Delta and measures 25mm thick. Given that the stated RPM is 7000, the little wire fan grill is a welcome sight, and one that will help prevent both fingers and errant wires from doom. With such a small formfactor it is really important to have a high-powered and reliable fan cooling the heatsink. Larger heatsink have a bit of a grace period if the fan fails because their larger mass can absorb the heat and even cool by convection alone in some circumstances. A small heatsink like this doesn't have that opportunity.

Top: The 26 fins which are soldered to the copper base plate measure 0.5mm thick and are spaced about 1mm. The aluminum fan shroud elevates the base of the fan 6mm above the tips of the copper fins. It is also worth noting that the center clip is not held in place within the body of the heatsink by any tabs.

Side A: The side of the heatsink is solid, so the only way exhaust air can escape the heatsink is out the two sides. Given the softness of the copper it wouldn't make much sense to have any kind of mid-heatsink exhaust ports.
Side B:
It is hard to say exactly why the sets of fins are different colours, but I don't think it will have anything to do with how well they cool :-) The fins are all 25mm in height even though the ones on the outer edges appear as though they are shorter. The base plate is 5mm thick and the clip requires the use of a flat head screwdriver to get engaged.

Heatsink Base:

The base metal which is solid copper looks like it was punched out of a larger sheet and left raw. The need for extra machining is really minimal as the base is just about dead on flat already. The surface finish is raw but pretty smooth. There is no undercut for the socket cam arm, rather Globalwin have just left the heatsink base a little short of the total possible width which is just fine.

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Table of Contents:

 1:  Globalwin CDK38 Copper Heatsink Review
 2: — Close up look at the heatsink
 3:  New Heatsink Test Parameters
 4:  Acoustic Test Results
 5:  Synthetic Temperature Test Results

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