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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!
With fan
speed control at your finger tips, the Gigabyte 3DCooler-Pro can go from pretty
quiet up to pretty darn noisy in just a second. The fan controller adjusts RPM
from 2000-4000RPM, depending on the level of cooling you desire, and platform.
In our tests, we found a much wider temperature response on the Intel test
platform, and only a very minor change on the AthlonXP platform. Meaning, the Gigabyte 3DCooler-pro should makes a
better low-noise heatsink for AthlonXP processors, and a better high-end cooler for
Pentium4 processors. 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.
(low) FrostyTech Acoustic Sampling
Chamber
(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.
According to our real world sound measurements with the Omega HHSL1 digital sound meter, at its lowest setting the Gigabyte 3DCooler-pro is very easy on the ears at about 37 dB. With the RPM's cranked all the way up, the 3DCooler is one of the loudest heatsinks we've tested, measuring in at nearly 64 dB! Up next, thermal results for the K7 and Pentium 4 platforms.
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