Fractal Design Momentum 14: This Is How It Should Be Done

Cooling, Extra tests, Fans | | Ľubomír Samák

Vox Populi, Vox Dei. You wanted tests of the Fractal Design Momentum 14 fan—you shall have them. Naturally, we also recognized the importance of keeping a check. Especially after what we observed with the RGB variants (Momentum 14 RGB). The non-illuminated FD fans are even a hair better—often unmatched far and wide. Fractal Design’s generational improvements in their fans have turned out as well as they possibly could.

Results: Frequency response of sound w/o obstacles

Measurements are conducted using TrueRTA, which captures audio data across 240 frequency bands within the 20–20,000 Hz range. To facilitate comparisons between articles, we extract and present the dominant frequency from each of three spectral bands: low (20–200 Hz), mid (201–2000 Hz), and high (2001–20,000 Hz) in standardized 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 any aspects of the graphs or data tables are unclear, detailed interpretation guidelines are provided in this article.

Most fan-related acoustic activity occurs within the 70–7000 Hz range. Frequencies above 7000 Hz typically represent electromagnetic interference from the test environment, while the lowest bands below 70 Hz may also include such noise, albeit mixed with aerodynamic sound. Although we could exclude these frequency extremes, they are retained to detect and visualize potential anomalies.



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Why is a value sometimes missing for a fan? There can be several reasons. Most commonly, it’s because the fan couldn’t be regulated to the target noise level. Some fans have higher minimum RPM (or they spin slowly but have an excessively noisy motor), or they are simply slower models that can’t reach higher decibel thresholds. Results are also omitted from graphs if the impeller scrapes against the mesh of a nylon filter. In such cases, we classify the combination as incompatible. And of course, a zero in the graphs naturally appears in situations where we record an actual 0.00. This often occurs at extremely low speeds when obstacles are present or during vibration measurements.


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Comments (22) Add comment

  1. Thanks for another good testing.

    So that means the non-RGB version is noticeable worse (as case fans, high airflow/low noise) than the RGB-fans, and is made basically obsolete by the RGB version.
    Basically every case nowadays has two obstacles in front of the fans: the first nylon filter to hold of dust, and an additional plastic/metal front mesh (similar to the plastic filter) in front of the nylon filter.
    At quiet levels of 31 & 33 dBA (724 & 864 RPM) the RGB-version delivers staggering 23 & 68 % higher airflow with the nylon filter.
    At 36 & 39 dBA (1015 & 1132 RPM) it’s still 10 % higher.
    As the nylon filter is always present, that should be deciding factor to look at, when it comes to air flow, as case fans.
    So the way lower static pressure at low RPM is the reason for this, due to the small differnce in fan blade lenght?

    Question: You haven’t tested the RPM range from 348 – 724, but based on your testing it can be safely considered the gap in airflow will be even higher compared to the RGB version? (31 dBA is 68 % difference, than 23 %, than 11 % etc.)

    @Ľubomír Samák
    Do you afraid to tell the harsh truth? Because I don’t see it. I understand free review samples, B2B-relations, sympathetic to manufacturers this and that, but when negative points are not criticized properly, than it automatically devaluates/disprizes other better products.
    Despite this version being quite good some cases, it’s noticeable worse in performance and overall. Your conclusion is way too favourable and not displaying that.

    I thus disagree with you giving it the top-notch award; that should be for the RGB version only.
    This is what I mean with “devaluing” etc. pp. You now make it look like they are both top notch, but they are not.
    I would be thankful you would be more honest.

    “Get the RGB version, even if it costs 7 bucks more”, that’s what my conclusion is 🙂 🙂 🙂

    Have a nice day!

    Reply

      1. Right, this often shifts toward comparing specific results to the RGB version—but that’s not the only thing we base awards on.

        Yes, Momentum 14 RGB performs impressively in many ways—but so does the non-RGB version. It comes down to user preference. Performance on a grille might not look as “cool” as performance on a radiator, I guess. 🙂

        Reply

        1. –“…Performance on a grille might not look as “cool” as performance on a radiator, I guess…
          Well on that matter
          …in my opinion, the performance on the radiators is the least important for me 😉
          …when you buy an Air/AIO Cooler, it already comes with fans.
          (buying a cheap tower and then buying expensive fans is usually more expensive than buying straight a cooler with better fans) 😛
          for me the most important are 1) nylon, 2) hex (I wish it was on the opposite side) 3) plastic filter and 4) w/o …I think you know it 😉

          Reply

    2. Thank you for the detailed comment.

      First, I don’t agree that the Momentum 14 is significantly “worse” than the Momentum 14 RGB. But let’s break it down point by point:

      „As the nylon filter is always present, that should be deciding factor to look at, when it comes to air flow, as case fans.
      So the way lower static pressure at low RPM is the reason for this, due to the small difference in fan blade length?”

      There may be several reasons, or more likely a combination of them. It’s important to remember that our tests are normalized by noise level (in dBA), not rotational speed. Differences in motor types, blade geometries, and other design aspects also play a role. There are numerous possible explanations why the Momentum 14 achieves lower static pressure at low speeds than the RGB version.

      „Question: You haven’t tested the RPM range from 348 – 724, but based on your testing it can be safely considered the gap in airflow will be even higher compared to the RGB version? (31 dBA is 68 % difference, than 23 %, than 11 % etc.)“

      It’s possible, yes. But as you noted, we haven’t tested that range, so we can’t say for sure…

      Now regarding your more personal remarks:

      „Do you afraid to tell the harsh truth? Because I don’t see it. I understand free review samples, B2B-relations, sympathetic to manufacturers this and that, but when negative points are not criticized properly, than it automatically devaluates/disprizes other better products.

      Despite this version being quite good some cases, it’s noticeable worse in performance and overall. Your conclusion is way too favourable and not displaying that.“

      The “harsh truth”? Honestly—Momentum 14 is a great fan. It’s true that the RGB version performs better in some areas, but the comparison must be broader—against all fans, not just its illuminated variant. Not awarding Momentum 14 a “Top-notch” rating would be unfair.
      Take, for example, the NF-A14x25 G2 PWM’s results with a dust filter—those were also weak. Yet it received our top award, because it excelled in many other areas. Similarly, Momentum 14 achieves outstanding performance through a hexagonal grille and consistently strong performance across the board. Radiator performance isn’t its strength, true, but that doesn’t disqualify its overall value. No situation tested resulted in poor performance—it’s all excellent or at least very good.

      As for any suggestion of favoritism or bias due to free samples or B2B ties—you’re mistaken. Please check our reviews of older Fractal fans (before the Momentum line). Or Arctic’s older BioniX F120. Those products didn’t receive praise because they didn’t deserve it—despite also being provided by the manufacturer. We truly don’t know how a fan will perform until we test it. Assumptions about preferential treatment simply aren’t correct.

      „I thus disagree with you giving it the top-notch award; that should be for the RGB version only.“

      Of course, you’re free to disagree, and we fully respect your opinion. But as explained above, we see things differently.

      „Get the RGB version, even if it costs 7 bucks more”, that’s what my conclusion is…“

      That’s certainly a valid perspective—but it’s not one we personally share. 🙂

      Reply

  2. May a bit offtopic but still quite interesting:

    Regarding Fractal’s new case, specifically the Meshify 3 Ambience Pro RGB version.
    https://www.hwcooling.net/en/arctic-p12-pro-key-to-noiselessness-is-in-7-blades-review/
    I looked at the comments from ThermalLeft, Bufo and Pluten and what was linked regarding some issues/solutions regarding

    1) air guides
    https://www.reddit.com/r/Noctua/comments/1fafbt4/project_manifoldium_ducted_noctuafractal_build/

    2) Impactul problem that nearly every case introdues: in order to attach fans to case, nearly every manufacturers uses mechanism which places obstacles right in front of the fans, making them way noisier
    https://www.youtube.com/watch?v=WKs7_1gK4Zo

    3) fan shrouds
    https://www.reddit.com/r/FractalDesign/comments/1kositm/fractal_design_define_7_with_fan_inlets/

    Looks like Fractal has adressed two of them and thus is the reason why this specific version Meshify 3 Ambience Pro RGB is the best (or top 3 at) airflow case on the market right now. The other one is thre pre-installed Momentum 14 RGB fans, and not the non-RGB Momentum 14 fans.

    https://gamersnexus.net/cases/new-best-fractal-meshify-3-case-review-thermal-benchmarks-noise
    1) They introduced the air guide in front of the PSU shroud, and gamersnexus proved it leads to noticeably higher airflow and lower noise at the same time. They taped a cardboard box extension onto the end of the PSU shroud and measured the difference: 4 degree Celsius lower GPU temeperature (full torture, 100 % fan speed) and 1.2 lower dBA with the air guide.

    2) https://thinkcomputers.org/fractal-design-meshify3-review/2/
    As can be seen in these images from the test, there are no obstacles in front of the fans anymore; they changed the way attaching the fans to the case completely. No metal bars, plastic thingies whatever. Completely unobsructed.

    3) There are no fan shrouds present in the case, but since point 2) is eliminated, I wager to say they are not needed.

    I now took some cardboard and a scissor and made a self-made air guide in front of the PSU bottom shroud 🙂

    Reply

    1. Thank you for the useful materials. Yes, ThermalLeft is doing an excellent job, and the mounts in the Meshify 3 Ambience Pro RGB indeed look solid—both structurally and acoustically. By the way, we’ve tested that case too:

      https://www.hwcooling.net/en/the-fractal-design-meshify-3-xl-arrives-with-new-fans/
      https://www.hwcooling.net/en/fractal-design-meshify-3-xl-case-in-thermal-tests-review/

      And while the airflow design supports effective system cooling, that doesn’t always translate into significantly lower component temperatures. Even a relatively modest airflow can be enough to maintain sufficient air circulation inside the case. Beyond that point, higher airflow tends to just increase noise, not dramatically reduce temperatures.

      Reply

      1. –“…Even a relatively modest airflow can be enough to maintain sufficient air circulation inside the case. Beyond that point, higher airflow tends to just increase noise, not dramatically reduce temperatures…”
        Yes 😛
        …buuuut, if you play around with the settings and balance the intake/exhaust air volume…theeeeen 😀

        Reply

        1. …and yes, with increasing RPM, noise increases more than the positive contribution to cooling…that’s why lower sound levels are more important to me 😛

          Reply

    1. Please let us know which specific charts are not displaying for you. I’ve just gone through the article section by section and everything appears fine on our end—there’s nothing I can currently identify that needs fixing.

      That said, I’m not ruling anything out, but I can’t assist further unless you let us know which part isn’t rendering correctly.

      P.S.: If data is missing from some charts, that’s usually because the results couldn’t be recorded. Possible reasons are always noted in the conclusion boxes of the relevant sections. In very specific cases, it may also be mentioned in the final verdict of the review.

      One common reason is that a fan could not be set to a specific noise level—typically due to excessive tonal peaks making the noise output unstable. This tends to happen at relatively high RPM settings. But I assume this isn’t what you’re referring to? 🙂

      Reply

  4. Would you recommend the Toughfan 14 pro as the best 140mm fan for AIO radiators? I am waiting for the T30 140mm, but it has not been released yet, which is frustrating.

    Reply

    1. Among all the fans we’ve tested so far and published results for, the Toughfan 14 Pro stands out as the most aerodynamically efficient fan on radiators. That said, I wouldn’t go as far as calling it the overall “best” fan, because such a verdict needs to account for more than just cooling performance. As you’ve seen from our review, the build quality of Thermaltake’s units isn’t exactly flawless—some samples had clicking noises. We’re definitely looking forward to seeing the T30 in a 140 mm format as well. 🙂

      P.S.: If you’re considering the Toughfan 14 Pro for a radiator setup, you might want to hold off just a little longer (a few days…) until we publish our results for the Arctic P14 Pro fans. 🙂

      Reply

  5. I have a question about the test methodology and its application to exhaust fans. Since the ‘Results: Airflow through a hexagonal grille’ section appears to measure performance with the grille positioned in front of the fan, but case exhaust fans typically have their grilles mounted behind the fan, would the ‘Results: Airflow w/o obstacles’ measurement be more representative of actual exhaust fan performance in typical PC cases?

    Reply

      1. …according to Qasarzone measurements it is about 90% of the unrestricted flow… of course there are some exceptions like the Corsair LL 120 ARGB (70%) 😉
        …and Ľubo is right that this measurement would not yield that much information entropy. 😛 …and the ranking would be very similar to w/o

        Reply

        1. It depends on the type of grille at the output in terms of airflow restriction. With more closed structures (thicker walls), the impact will be greater, of course; with less closed ones, it could be even less. But 90% might be around the level that case manufacturers are aiming for. Their goal will also be to keep airflow as high as possible, even though it’s a compromise between this parameter and structural strength. Strength should still be good enough even with cases that have a mesh that is less dense, or rather has a higher degree of openness. After all, even if someone cuts out the grille, the case still holds together. The case’s structural strength will probably depend more on the frame, profiles, and such rather than on the grille itself. I don’t want to comment too much on this though, as it’s already bordering on mechanical engineering knowledge and so on. 🙂

          Reply

            1. It wasn’t only Arctic that tested this, but us too. And yes, the difference in airflow with a circular grille versus without a grille is minimal. We’ve only based this on the results of one fan (Noctua NF-A12x25 PWM), but… there’s not much reason to believe it would be drastically different with other aerodynamic fan designs.

              Of course, without a grille, there’s definitely a safety risk that should be prevented (by using the grille, obviously…). 🙂

              Reply

    2. Yes, the grille is in front of the fan. Having data from different positions (in front of the impeller and behind it) would, of course, be useful. But due to time constraints we had to decide on one option, and that’s the one we test (with the grille in front of the fan). This is because in that position the tonal peaks differ quite a lot between fans, whereas with the grille behind the impeller the acoustic profile doesn’t change much compared to without an obstacle. Of course, depending on the specific aerodynamic design, this may differ, but the differences are definitely more pronounced with the grille in front of the impeller in terms of acoustic profile. As for airflow—it strongly depends on how open (or closed :)) the obstacle is. Whether the grille is in front of or behind the fan, the airflow at comparable RPMs will be similar. 🙂

      Reply

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