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Without power limits enforced on Intel’s Core Ultra 9 285K and i7-14700K CPUs, the CPU will hit its peak temperature (TJ Max) and thermally throttle with even the strongest of air coolers and even most liquid coolers on the market. When the CPU reaches its peak temperature, I’ve measured the CPU package power to determine the maximum wattage cooled to best compare their performance. It’s important to note that thermal performance can scale differently depending on the CPU it’s being tested with.
Keeping Intel’s Core Ultra 9 285K cool is no easy task, but Montech’s Hyperflow Silent 360 performed rather well – tied for the second best results we have with Arrow Lake.
But as I’ve mentioned before, how well a cooler performs can vary depending on what CPU it is paired with. Amongst other factors, the hotspot location of a CPU will impact how well a cooler can do its job.
While this AIO does very well with Arrow Lake and its shifted hotspot, it doesn’t perform quite as well with Raptor Lake. It isn’t able to keep Intel’s i7-14700K CPU under its peak temperature, and as a result has minor thermal throttling in this test. This is slightly worse than the previous-gen AIO from Montech, but the Hyperflow Silent also has slightly lower maximum noise levels.
To achieve these levels of thermal performance, the fans of the cooler spin up to 48.2 dBA. While this is slightly quieter than the last Montech AIO, it isn’t “silent” in any sense of the term.
CPU-only thermal results with noise normalized to 38.9 dBA
Finding the right balance between fan noise levels and cooling performance is important. While running fans at full speed can improve cooling capacity to some extent, the benefits are limited and many users prefer a quieter system.
With this noise-normalized test, I’ve set noise levels to 38.9 dBA using the i7-14700K system. This level of noise is a low volume level, but slightly audible to most people. The Hyperflow Silent performed excellently in this scenario, providing one of the best results I have recorded when the cooler is configured to run quietly!
253W results
My recent reviews have focused more on tests with both the CPU and GPU being stressed, but many of y’all have indicated that you would like to see more CPU-only tests. So I’ve started testing Intel’s “Arrow Lake” Core Ultra 9 285K with a 253W limit. My current results for this test are limited, but this will grow as I have time to test more coolers.
Testing with the default power limits of 253W shows good performance, tied for the second-best result I’ve observed yet – with the disclaimer that I’ll need to test more coolers in this scenario for a complete picture.
165W CPU + 290W GPU results
Last year, I updated my testing methodology to better represent the scenarios a user might encounter in real-life use. The first of these new tests is designed to emulate, though not perfectly, a CPU in an intensive game with a full GPU load using ASRock’s Steel Legend 7900 GRE GPU and Intel’s Core i7-14700K CPU.
Most of the time, Intel’s i7-14700K will use less than 165W in games. This value was chosen because it was the peak power consumption I observed in Far Cry V. I would consider the results of this test closer to what you might see with an overclocked setup.
In terms of thermal performance, Montech’s Hyperflow 360 is tied for third place with MSI’s AI13 AIOs and Montech’s last generation AIO. Noise levels were measured at 45.3 dBA, the same as Montech’s previous Hyperflow AIO. One would hope that a cooler with the branding of “silent” would run quieter than this.
135W CPU + 290W GPU results
Testing a CPU Cooler in isolation is great for synthetic benchmarks, but doesn’t tell the whole story of how it will perform. I’ve incorporated two tests with a power limit imposed on the CPU, while also running a full load on MSI’s GeForce RTX 4070 Ti SUPER 16G VENTUS 3X.
The CPU power limit of 135W was chosen based on the worst CPU power consumption I observed in gaming with Intel’s Core Ultra 9 285K, which was in Rise of the Tomb Raider.
In this test, Montech’s AIO performed well – tied for third placem alongside BeQuiet’s Light Loop 360 and NZXT’s Kraken Elite, both of which are more expensive products! The noise levels, on the other hand, were not as impressive. Measuring at 41.4 dBA, the noise levels aren’t loud – but they were the noisiest of all coolers tested in this scenario.
85W CPU + 290W GPU results
Our third round of CPU + GPU testing is also performed with Arrow Lake. The power limit of 85W was chosen based on typical power consumption in gaming scenarios using the Core Ultra 9 285K CPU. This should be fairly easy for most coolers, the main point of this test is to see how quietly (or loudly!) a cooler runs in low-intensity scenarios.
With a CPU temperature of 50C, Montech’s AIO is tied with Thermalright’s Grand Vision for the best thermal results in this test. However, noise levels were again unimpressive compared to the competition. While the result of 39.6 dBA isn’t noisy, it is again the loudest result of all coolers I’ve tested in this scenario.
Conclusion
Montech’s HyperFlow Silent 360 is a well-performing AIO, with especially strong thermal performance when paired with an Intel Arrow Lake CPU. It has a low price of only $89 USD, backed by an impressive six-year warranty. It isn’t quite deserving of its“Silent” branding, and runs louder than many competitors on the market – but if you force the cooler to run silently, it provides stronger performance than most competitors.
