Fractal Design Define Mini MicroATX Tower

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System Configuration:

Measurement and Analysis Tools

System temperatures and noise levels were recorded with SpeedFan and GPU-Z at idle and on load using Prime95 (large FFTs setting) and FurMark, an OpenGL benchmarking and stability testing utility.

Stock Fan Noise

The 120 mm exhaust fan.

The Define R3 had different fans than the R2 with higher speeds (1350 RPM vs. 1000 RPM) and different blade design, and they've switched it up once again with the Define Mini. The two included fans inexplicably have the same model number as the old ones (FD-FAN-120) but are 150 RPM slower and have 11 blades rather than 7.

Baseline Noise Level
Fan Voltage
21~22 dBA
25 dBA
26~27 dBA
17 dBA
20 dBA
21~22 dBA
14 dBA
16 dBA
17~18 dBA
11~12 dBA
12 dBA
13 dBA
Measuring mic positioned 1m at diagonal angle left/front of case.

The new fans have a similar acoustic character, being quite smooth at any speed, but we noticed the front model had a noticeable clicking noise. This might be because it was mounted to a plastic frame, which in turn was clipped onto the case. The fan controller can be adjusted from 12V down below 4V, until the fans stop spinning completely. Altogether, they produced 26~27 [email protected] at full speed and were close to inaudible at 5V. This wide range makes the fans and the controller versatile enough to complement gear with varying levels of noise.

The sweet spot for the stock fans was 7V where they measured 17~18 [email protected] inside the case.

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