Scythe Grand Tornado 120: Even an LCP fan can be “cheap”

We were very excited to see the results of the Grand Tornado 120. It looks good geometrically and is also one of the cheapest LCP models out there. Scythe has also informed us that the Grand Tornado 120 is set to outperform the legendary Gentle Typhoon (D1225C). And it’s true, it does outperform it, though perhaps in different ways than you’d expect. But the LCP fan from Scythe gets along really well with radiators.

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.

The vast majority of fan sound operates in the 70–7000 Hz band. You can virtually ignore frequencies above 7000 Hz, they reflect electromagnetic noise from the measurement chain. This (electromagnetic noise) also extends to frequencies below 70 Hz, although there is still aerodynamic noise at these frequencies. These bands (below 70 Hz and above 7 kHz) could be safely “cut out”, but we do not. Just in case one of the fans does have an anomaly that needs to be controlled and visualized.



Wordpress Table Plugin




Wordpress Table Plugin




Wordpress Table Plugin


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 impeller 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.


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Comments (4) Add comment

  1. DNF at the very high target of 31dB(A) means it isn’t cheap, it means no matter the price it’s too expensive
    additionally knowing it starts at around 680RPM and it still doesn’t pass that target means it’s just bad acoustically
    it may find a niche, people are frequently mentioning this or that dethroning Noctua while the performance is only slightly higher at one very specific and extremely high noise target so at some point it may be a decent option, but I just wouldn’t bother, no reason to stand that noise when I can just set A12x25 a tiny bit below this ones starting speed and have it perform better and stay silent

    1. This is subjective. It depends on who is looking for what. If the priority is the highest possible airflow regardless of noise level, while also weighing low vibration or extra durability, then the Grand Tornado 120 can be a great choice. In the context of that potentially high durability (if Scythe doesn’t exaggerate the MTBF value…), we also discussed the server concept of the Scythe Grand Tornado 120 fan in the discussion below the text in another language

      1. for separate-room-home-server I’d likely go with Noctua PPC or T30 (or NH-P1 due to superior reliability if the heat load was lower, though AC has the advantage of providing a decent heatsink that will prevent your system from shutting down even if fans stop, LC on the other hand…), for regular server room with regular server fans like Delta
        for living/working space silence is a requirement impossible to give up on so the silent performance is all that matters

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