CoolJag CJC66IC Review

This heatsink is very cool in two basic areas. First there is a thermally controlled fan that actually works. Despite having the thermal sensor located on the intake side of the cooling system the fan responded to temperature variations, as it should. During the cooling tests the fan started out at 1800rpm and quickly spun up to 3000rpm when the system reached normal operating temperature. Once the load tests started the fan would again spin up to compensate. The processor temp remained fairly constant regardless of load.
I applaud CoolJag's choice in fans though feel a 25mm fan would provide better overall cooling while still remaining fairly quiet.

The second impressive part is the unique clipping method used on the CJC66IC. This would appear to be the first of its kind and is very easy to use. The only drawback is how much pressure the clip applies to the heatsink. Once installed you can still move the heatsink around giving the indication that a complete pressure fit is not being made. The problem can be remedied by placing some "shims" along the top edge of the heatsink. Some thin strips of cardboard from the CoolJag box appear to work quite nicely.

Processor temps were higher than I had expected and I feel that this is due in part to the very heavy copper heatsink and underpowered fan. There is just a lot of heatsink to keep cool and a lack of air movement to make it happen. On a good note any 70mm fan will fit on the CoolJag CJC66IC, simply unscrew the current fan and replace it with another. Longer screws will be needed since the current screws are countersunk into the fan.

Now for the ever popular list of Good things and Bad things.

Great mounting system
Quiet thermal fan that works
Skived fin copper heatsink
Good construction
Beginnings of a fan shroud

Higher than expected processor temperatures
Heavy heatsink (hard to cool)
Underpowered fan for heatsink size

I would like to thank CoolJag for helping to make this review possible.