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Globalwin CAK38 Copper Heatsink
Globalwin CAK38 Copper Heatsink
Abstract: Right now the Globalwin CAK38 is one of the top-tier copper socket A coolers available. It weighs in at 450g and comes with an almost unbeatable 6800 RPM Delta 60mm fan.

 Manufacturer  Category  Published  Author 
Globalwin   Cooling / Heatsinks   May 13, 2001   Max Page  

Home > Reviews > Page: Final results and conclusions

Synthetic Test Results:

FrostyTech Synthetic Temperature Test Platform (50W heat load)
Mfg. Name Model No. Ambient Temp. (C) Large block (C) Small block (c) Thermal compound Thermal pad No. Fans Fan Noise Clip
1 Globalwin CAK38 25.1 43.5 45.8 silver goo none 1 high stiff
2 Thermoengine V60-4210 25.0 43.9 47.6 AOS52029KY grey 1 low mod
3 Zalman CNPS3100 25.2 54.0 48.0 silver goo none 1 lg low med
4 GlobalWin WBK 38 25.0 43.9 49.4 AOS52029KY pink 1 high stiff
5 Thermaltake Volcano II 26.5 51.7 53.2 AOS52029KY yellow 1 low hard
6 Zalman CNPS3000 26.0 53.4 53.5 silver goo none 1 lg low med
7 Zalman CNPS2005 27.0 56.5 54.8 silver goo none 1 lg low med
8 Blizzard S370-L 25.8 52.4 54.7 silver goo none 1 low easy
9 Thermaltake Superorb 25.6 49.2 60.1 AOS 52029KY none 1 (2) low easy
10 Vantec GSW-6015 26.0 48.0 64.2 AOS 52029KY none 1 low easy

While it may not be the prettiest of heatsinks on the outside, the CAK38 doesn't let it slip when it comes to sheer performance numbers. The 6800RPM Delta fan ensures that this copper cooler comes in on top of our reference heatsinks in this test. Scoring a temperature of 45.8 degrees on the synthetic tester is no small task. It takes a combination of good thermal conductivity and the ability to rapidly remove the heat to the surrounding environment.

The only two non-cosmetic complaints we have with the CAK38 are that the fan is very loud, and that the clip is very stiff. I would be a bit weary of clipping this heatsink onto my favorite Athlon with out first bending the clip down a little bit. Even for an Athlon heatsink it seems that the clip is tighter than it normally is.

Rise Above Ambient Temperature (C)
Mfg. Model with large block with small block
1 Globalwin CAK38 18.4 20.7
2 Thermoengine V60-4210 18.9 22.6
3 Zalman CNPS3100 29.5 22.8
4 GlobalWin WBK 38 18.9 24.4
5 Thermaltake Volcano II 25.2 26.7
6 Zalman CNPS3000 27.4 27.5
7 Zalman CNPS2005 28.8 27.8
8 Blizzard S370-L 26.6 28.9
9 Thermaltake SuperOrb 23.6 34.5
10 Vantec GSW-6015 22.0 38.2

Rise above ambient is where the real competition always takes place. Sure it is always good to see how each heatsink performed on each of the copper die templates, but the rise above ambient scores are what settles the score.

In this instance the CAK38 comes very close to making it into the teens on both copper die templates - something that no heatsink we've tested has yet to accomplish on the synthetic test rig. The CAK38 is not really designed to fit onto larger heatspreader-based processors but we still test it anyway's. The results on the larger copper die template give some scale to the other results, and can identify some problems with poor heat spreading in certain heatsinks.


All in all the CAK38 is an excellent cooling solution if you don't mind the noise. We were a bit disappointed with the poor finish of the fins, and the less than flat base, which is also quite rough. That said, the CAK38 still manages to spit out some spectacular cooling numbers on the synthetic test bed.

It is alway's good to see that big fans like this come with Molex pass through cables, just incase you aren't sure you motherboard can handle the draw. While the Delta fan can be plugged into the fan header on the motherboard, an adaptor makes it possible to connect the fan directly to the power supply. It's a small feature, but a nice one to see included with a heatsink these days.

I would suggest anyone who gets one of these copper coolers from Globalwin spend the time and lap the base of the heatsink for a while. Just smoothing out that base will do wonders for heat transmission. If that isn't your style, be sure to use plenty of good thermal compound (we used generic silver compound in our tests) to fill in all those light marks.

So what is the bottom line on the CAK38? It's loud, it's ugly, and it really works well. I guess it's what counts that really matters. ;-)

 Previous Page ° Heat Sink Review Index  

Table of Contents:

 1:  Globalwin CAK38 Copper Heatsink
 2:  Globalwin CAK38 Heatsink Perspectives
 3:  Looking a little bit closer
 4: — Final results and conclusions

List all Globalwin heat sinks that Frostytech tested?

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