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
Comments Locked

74 Comments

View All Comments

  • Yuriman - Wednesday, May 24, 2017 - link

    Nice review! Please do more of these.

    One thing I'd like to see is to have the coolers' thermal resistance normalized for noise. I understand that's not an easy task, but it would be nice to see how much each can dissipate at a given noise level (the only two metrics most people really care about), rather than having both noise and resistance being variables.
  • Paapaa125 - Wednesday, May 24, 2017 - link

    I agree, that would be the best data. If not feasible, I'd like to see the thermal characteristics of each cooler using the same fan at the same speed (tested at many levels).
  • Lolimaster - Thursday, May 25, 2017 - link

    Ryzen 7 1700 + Hyper 212X <45°C at load @900rpm, can't even hear the thing.
  • fanofanand - Thursday, May 25, 2017 - link

    There are way more variables loli, what kind of case do you have? Any added insulation? What's the average sound level in your room? Do you have a high powered GPU that drowns out the CPU cooler? Do you have loud case fans? Do you have a loud PSU? I'm sure you have a very nice system so having a normalized test would clear up the questions for everyone rather than anecdotal "I can't hear it" statements. Not trying to attack what you are saying but I 3rd the idea that normalized testing for performance at a specific sound level would be great. Even then, different sounds can be more grating than others depending on the pitch. This is probably the hardest area of computing to test, is sound.
  • Lolimaster - Saturday, May 27, 2017 - link

    Cheapo case, only fans are the cpu, psu (a seasonic) and a RX560 a low rpm + undervolt.

    The only thing I actually hear are my 3 HDD's, if I boot without those is basically the expected electric hum.

    My place is quite silent.
  • Gigaplex - Monday, May 29, 2017 - link

    If you can't hear the Hyper 212X @900rpm you may need to get your ears checked.
  • JocPro - Monday, May 29, 2017 - link

    Same here, R7 1700 + Thermaltake NiC L32 (It's a Slim 140mm tower - why wasn't in the review?) 500 RPM idle, ~600 RPM load... I can't hear it, even trying. The case has 4 CM Silencio PWM @ 900 RPM, and only the air pushed is audible.
  • jospoortvliet - Friday, May 26, 2017 - link

    I would prefer to see coolers sped up to the point they produce a fixed amount of noise (say 38db or so) and then compare how much they cool. A much better way to compare them.
  • Robotire - Wednesday, May 24, 2017 - link

    Interesting topic but I have a hard time getting useful information out of this article. I would have prefered to see noise levels and efficiency at idle and at full CPU load instead of these artificial 7V and 12V levels. Also there is no easy to read conclusion to help people in a hurry choose the best cooler for their need, and I have no idea what the thermal resistance values mean.
  • mgilbert - Wednesday, May 24, 2017 - link

    When it comes to air coolers, there's Noctua, then there is everyone else. They are superior in virtually every respect, especially quality and support.

Log in

Don't have an account? Sign up now