Cooler Master SickleFlow 120 ARGB: If not for the horrible rattling…

Cooling, Extra tests, Fans | | Ľubomír Samák

Results: Frequency response of sound w/o obstacles

It could have been a very good, affordable fan with lighting. Moreover, the SickleFlow 120 ARB rotor design is efficient, at an excellent level, but all the good features are killed by one thing – an extremely noisy motor. It’s so noisy that a return trip from the factory output control would be appropriate. And it’s not just your everyday whir that you hear only from centimeters away. No one will ever miss this sound.

Results: Frequency response of sound w/o obstacles

Measurements are performed in the TrueRTA application, which records sound in a range of 240 frequencies in the recorded range of 20–20,000 Hz. For the possibility of comparison across articles, we export the dominant frequency from the low (20–200 Hz), medium (201–2,000 Hz) and high (2,001–20,000 Hz) range to standard bar graphs.

However, for an even more detailed analysis of the sound expression, it is important to perceive the overall shape of the graph and the intensity of all frequencies/tones. If you don’t understand something in the graphs or tables below, you’ll find the answers to all your questions in this article. It explains how to read the measured data below correctly.

Noise levels in the tables below -87 dBu (but watch out for the negative sign, -70 dBu is louder than -80 dBu) can be ignored. They are in fact extremely weak and always far below the limit of human perception, and are often defined by the “noise” of the measurement string. Therefore, do not take even the dominant frequencies within the treble band that exceed 12 kHz too much into account.







Why is there a missing value sometimes? There may be more reasons. Usually it is because the fan could not be adjusted to the target noise level. Some have a higher minimum speed (or the speed is low, but the motor is too noisy) or it is a slower fan that will not reach the higher decibels. But the results in the graphs are also missing if the rotor is brushing against the nylon filter mesh. In that case, we evaluate this combination as incompatible. And zero in the graphs is naturally also in situations where we measure 0.00. This is a common occurrence at extremely low speeds with obstructions or within vibration measurements.


  •  
  •  
  •  
Continue:
Flattr this!

Related articles

MasterBox 600. New case (also) for boards with rear connectors

News, PC cases | | Ľubomír Samák

Cooler Master has released, in its own words, a versatile PC case. By this (versatile) it seems to refer, among other things, to the support of motherboards with unconventional placement of connectors on the back of the PCB. But within a certain universality, the MasterBox 600 is ready for practically all component formats. The size of the case corresponds to an average midi-tower. Read more “MasterBox 600. New case (also) for boards with rear connectors” »

  •  
  •  
  •  

12VHPWR cable thermal imaging: Different PSU, different temps

Cooling, Extra tests, PSUs | | Ľubomír Samák

Something for warm-up. We’ll start our ATX 3.0 PSU tests with perhaps the most talked about topic surrounding them, the temperatures of the new cables with 16-pin PCIe connectors. The overview of the PSUs of twelve brands answers well the question of how the manufacturers handled which models. With high current loads, the temperature differences can be quite significant, both on the connector housings and on the wire insulation. Read more “12VHPWR cable thermal imaging: Different PSU, different temps” »

  •  
  •  
  •  

Not lucky last time? We still have the Cooler Master GX III Gold 850

Giveaway, News | | Redakcia

One PSU contest is over, another one is starting. Cooler Master has donated its 850-watt GX III Gold model to our HWCooling contest. With a little luck, you can win one. It won’t be completely “free”, but you won’t break much of a sweat either. All you need to do is show a basic understanding of the Cooler Master power supply stuff. This will be especially easy for fans of the brand, but anyone can do it. Read more “Not lucky last time? We still have the Cooler Master GX III Gold 850” »

  •  
  •  
  •  

Leave a Reply

Your email address will not be published. Required fields are marked *