Fractal Design Array Mini ITX NAS Case

Cases|Damping
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TESTING

System Configuration:

Measurement and Analysis Tools

Stock Fan Measurements

140 mm Fan Specifications
Manufacturer
Power Rating
2.52 W
Model Number
FD-FAN-140
Airflow Rating
39 CFM
Bearing Type
?
RPM Rating
600 RPM
Corners
Closed
Noise Rating
9 dBA
Frame Size
140 x 140 x 25 mm
Header Type
3-pin
Blade Diameter
129 mm
Start Voltage
~6.0 V
Hub Size
45 mm
Weight
150 grams
Data in green cells provided by the manufacturer or observed; data in the blue cells were measured.

The included 140 mm fan is the same model provided by Fractal for our Define R2 case review. It measures a very low 11 dBA@1m in open air, but up close, it is noticeably clicky.

140 mm Fan Measurements
Voltage
Speed
SPL @1m
12V
690 RPM
11 dBA
9V
520 RPM
<11 dBA
Measuring mic positioned 1m at diagonal angle from the intake side of the fan.
Ambient noise level: 11 dBA.

Baseline Noise

The air cavity resonances inside a case amplify fan noise, as do any vibrations transferred from the fan into the case, so these measurements can be regarded as the baseline SPL levels for the case, fan and power supply.

Baseline Noise Level
140 mm Fan
PSU
SPL@1m
12V
off
15 dBA
off
on (no load)
16~17 dBA
12V
on (no load)
18~19 dBA
Measuring mic positioned 1m at diagonal left angle to top/center of case.

At one meter the front fan measured 15 dBA@1m mounted in the case, while the power supply switched on without any load measured 16~17 dBA. Both were relatively quiet though the clicking from the front system fan was audible as was the growly nature of the PSU fan at one meter's distance.


The power supply fan exhibits tonality at 350 and 600 KHz.


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