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TESTING
System Configuration:
Measurement and Analysis Tools
System temperatures and noise levels were recorded with SpeedFan and GPU-Z
at idle and on load using CPUBurn (K7 setting) and FurMark, an OpenGL
benchmarking and stability testing utility.
Baseline Noise
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Stock Fan Noise Level
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Fan
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SPL @1m (dBA)
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12V
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9V
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7V
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Rear
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21
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17
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15
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Front
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22
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18
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15~16
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Side
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37
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36
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33
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Rear & Front
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24
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19~20
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16~17
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Measuring mic positioned 1m at diagonal angle left/front
of case.
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With our system assembled we performed a quick test of the fans' acoustics. As expected the side fan sounded terribly buzzy, completely drowning out the other two. Even undervolted to 7V, the noise it emitted was a massive 7 dB louder than the front and rear fans combined at full speed. When removed and compared to the front fan (they are the same make), subjectively, we couldn't tell them apart, so it was clearly a mounting issue with the side panel. The other two fans were surprisingly smooth and inoffensive even at 12V. With the side fan being so annoyingly loud, we were forced to disable it during thermal testing as it would have completely torpedoed the results.
At 9V, the front and rear fans generated a noise level of 19~20 dBA@1m.
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