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Surface Roughness Comparator: Surface finish is an important factor that we all look for when holding a new heatsink. Flipping a cooler over to see how well the base has been machined is a quick way to judge the attention to detail that was put into making it. The following FrostyTech Surface Roughness Comparator offers a concise cross section common machine surface finishes. Not every heatsink base will fit into the envelope of this gage, but it does offer a very handy set of representations. This commercially available gage has 22 machined surfaces from 2 to 500 microinches; Lapped (2, 4, and 8 µ" RA), Ground (8, 16, 32, and 63 µ" RA), Blanchard Ground (16 and 32 µ" RA), Shape Turned (32, 63, 125, 250, and 500 µ" RA), Profiled (63, 125, 250, and 500 µ" RA), and Milled (63, 125, 250, and 500 µ" RA).
Acoustic Samples: Listen to this
Heatsink!
The
Kamakaze comes with a small brass dial attached to a PCI slot cover which allows
you to alter the RPM of the fan. The only trouble is that about 3/4 of the way
down from full speed the fan just stops. Quiet yes, effective no. At full speed
the fan on the Kamakaze is pretty moderate all things considered, and
considering that the potentiometer is too sensitive, I would be hesitant to turn
it too far down for fear of shutting the fan down altogether. The heatsink
barely makes a noise. To listen to this heatsink for yourself in operation, be
sure to click on the little headphones icon below and download the Acoustic
Sample MP3 file.
(high) FrostyTech Acoustic Sampling
Chamber Sound Level Measurements: Listening to the actual noise a heatsink makes allows you to hear what pure numbers alone cannot get across. To further emphasize FrostyTech's reliance on cold hard facts when evaluating a heatsink, we also take Decibel readings with a sound level meter. These results may be higher than the manufacturer's listed specs, but then again these are real world measurements. Measurements are made on the dB (A) scale.
At full speed, the Kamakaze fan weighing in at 51.0 dBA of noise. This is pretty much in the center of where other heatsinks are, so it shouldn't be a problem in most computers. The fan speed controller does give you the option of turning the speed, and hence noise, down, but didn't work very well as we have already mentioned.
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