Testing Results: Low Fan Speed

As most users don't actually need the fans of a tower cooler running at peak performance (and peak noise), let's also take a look at what kind of performance these coolers provide at lower fan speeds.

Broadly speaking, all four of the coolers that we tested for this review were capable of sustaining reasonable operating temperatures with thermal loads above 200 Watts, even with the speed of their fans greatly reduced.

Fan Speed (7 Volts)

Noise level

There are virtually no differences between these four coolers in relation to our previous test, with the Thermalright True Spirit 140 Direct again displaying the best overall thermal resistance and excellent efficiency with the handling of low thermal loads. However, the Noctua NH-U14S greatly outperforms all other coolers when it comes to the handling of very high thermal loads, suggesting that it can maintain reasonable operating temperatures on overclocked processors alongside with virtually inaudible noise levels.

Average Thermal Resistance

Once again, the Be Quiet! Shadow Rock Slim falls slightly behind the Noctua NH-U14S and the Thermalright True Spirit 140 Direct. The thermal resistance is only slightly worse but this time the Shadow Rock Slim also has no real advantage in terms of acoustics, as the difference between all four of the coolers is practically indiscernible.

Core Temperature, Constant Thermal Load (Low Fan Speed)

Finally, the Phanteks PH-TC14S displayed the lowest overall performance figures, with slightly worse thermal resistance than all of the coolers in this roundup review. Although the Phanteks PH-TC14S displays thermal performance similar to that of the other coolers at lower loads, the difference widens greatly when the thermal load is very high, suggesting that the cooler is at its limit in handling the excessive thermal energy flow.

Testing Results: Maximum Fan Speed Final Words
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  • CheapSushi - Thursday, May 25, 2017 - link

    I wish there was also a passive test. So we can actually see how that heatsinks on their own performance to gauge the efficiency and quality of the designs themselves. The fans add another variable. Maybe even have a case fan for some airflow. I'd like to see how the heatsink itself does because there can be situations where maybe there is a superior heatsink design here but the company has a poor fan compared to another competitor. The competitors fan could just be superior, thus brute forcing the better temps. How would you really tell? There's no passive test.
  • bug77 - Thursday, May 25, 2017 - link

    Hm, why doesn't the article list the weight of these coolers? When they're so large they tend to add quite some torque to the motherboard, so weight should be an important criterion when choosing between these.
  • doyll - Thursday, May 25, 2017 - link

    Great testing! TRUE Spirit 140 Direct did exceptionally well for an economy cooler. Would be interesting to see how the TRUE Spirit 140 Power, Archon IB-E X2 and some of the other Thermalright coolers. The PH-TC14S definitely is not a great cooler.
  • fanofanand - Thursday, May 25, 2017 - link

    The fact you threw in the Wraith cooler makes me sooooo happy! I was hemming and hawing between 1600 and 1600x with the free cooler thrown in being a nice boost for the 1600. Seeing that the better coolers show a pronounced improvement in most cases tells me that free cooler shouldn't be the decider.
  • Peichen - Thursday, May 25, 2017 - link

    Thermalright is like Cooler Master, simple design that reduce cost but performs well. People that have been OCing for the last 20 years know Thermalright's design is usually test proven
  • Leyawiin - Thursday, May 25, 2017 - link

    I own two of the original (smooth surface) Thermalright True Spirit 140. Its a very good cooler in many respects save for the fan mounting system. They have the most weak, fiddly wire fan mounts I've ever seen. Plus the rubber anti-vibration pads they were using back then simply won't stay on. I decided with later builds to use Noctua in subsequent builds and even though they're about a quarter to a third more expensive its worth it just for their great mounting system. Plus they regularly send me emails to remind me that all my coolers from them are eligible for free mounting hardware for new sockets. No other company that I know of does that.
  • azrael- - Monday, May 29, 2017 - link

    I think that one important aspect of any cooler review should be the *weight* of the cooler.

    Considering that in most system configurations the motherboard is mounted vertically and coolers are hanging off the motherboard, you really don't want them to be too heavy. Even though the cooler may be securely attached to the motherboard the heavier it is the more stress it exerts on the motherboard. Preferably, I don't want mine to weigh much in excess of 500g.
  • azrael- - Monday, May 29, 2017 - link

    I think that one important aspect of any cooler review should be the *weight* of the cooler.

    Considering that in most system configurations the motherboard is mounted vertically and coolers are hanging off the motherboard, you really don't want them to be too heavy. Even though the cooler may be securely attached to the motherboard the heavier it is the more stress it exerts on the motherboard. Preferably, I don't want mine to weigh much in excess of 500g.
  • darkbreeze - Friday, February 21, 2020 - link

    Quote - Nevertheless, the thermal performance of the NH-U14S is significantly superior as well, especially when the cooler needs to handle a high thermal load.

    Yes, I realize this thread is three years old, however, having come across it I couldn't let that blatantly wrong observation from the review go uncontested when the reviews own results CLEARLY show the Thermalright True Spirit Direct 140 having a lower overall rise over ambient than any of the other three coolers.

    How do you figure the Noctua has better performance if your own results show that the Thermalright does? Why did NOBODY notice that, and comment on it?

    If Crashman or Garrett over at TH had done that, they'd have been ripped to pieces.
  • Oxford Guy - Tuesday, January 4, 2022 - link

    I just read TH’s Best Coolers for 2022 article and the first one in the list is a Cooler Master that fails against the competition in every metric, according to the data in the site’s own reviews.

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