As some of you may have seen, this week we published a review of the Montech HyperFlow Silent 360 AIO cooler, both on the KitGuru website and our YouTube channel. In this review we explained that the HyperFlow Silent 360 AIO cooler has some issues in regards to the new AMD mounting system that Montech adopted.
The HyperFlow Silent is compatible with all current Intel and AMD desktop platforms, ranging from Intel 115X up to the latest Intel 1851 socket. And it's compatible with AMD, AM3, AM4, AM5. You get the upper mounting bracket for AMD installation, two Intel backplates – one for LGA 1700 and 1851 sockets – and then one for 115X, 1200 and so on.
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While other publications who have already tested this cooler appear to have used Intel platforms, we found performance of the cooler on an AMD 9950X to be rather disappointing. Especially considering the Arctic Liquid Freezer 3, the MSI MAG CoreLiquid i360, and the Be Quiet Light loop were all outperforming it with lower fan speed and noise output. Even the original HyperFlow ARGB measured 6 degrees cooler, too.
Reducing noise output to 40 decibels puts everything on a level playing field and the true thermal performance can be measured. But again, the HyperFlow Silent is at the bottom of the pile out of the coolers we have tested so far on the 9950X. It's a massive 8 degrees C hotter than the Lian Li HydroShift LCD360S, 6 degrees off its older brother, the original HyperFlow ARGB, and even the Arctic Liquid Freezer 3, which uses an almost identical fan speed at 40 decibels.
So performance of our sample on AMD is disappointing. To validate these figures we ran the same test several times and the HyperFlow Silent was within a degree either way each time. The only anomaly we noted was how the mounting pressure and thermal paste spread looked after each mount. Upon removal of the cooler, the thermal paste looked noticeably thicker on the right hand side of the CPU, so it's likely that the contact wasn't perfect.
To take things further, we also checked performance on our new Intel Core Ultra 9 285K system. The performance gap between the original HyperFlow ARGB and the HyperFlow Silent Is much closer here at maximum fan speed, but with noise normalised at 40 decibels, the original hyper flow ARGB cooler outperformed the Silent, but only by three degrees C – meaning the deficit is halved this time. However, this was only a quick experiment to give feedback on performance to Montech, so these are not to be classed as official test figures, and we are still working on gathering data for this platform.
At this point, it was clear to us that performance on AMD AM5 CPUs didn't seem to add up. But KitGuru reviewer and cooling expert James Dawson thought he had the solution after weeks of in-depth testing and analysis. As well as changing fans between the original HyperFlow ARGB and this new Silent version, there had been another hardware change, and that's the upper mounting bracket used for AMD AM4, AM5 installation.
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The new Silent cooler uses a 4 point mounting system. This slides onto the CPU block, and then it's mounted to the CPU socket. Instead of these four points using spring loaded screws, the older ARGB cooler uses a two point mounting system with two hooks that mount directly to the plastic upper mounting bracket that comes pre-installed to AMD motherboards.
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Image credit: Anandtech
If you think of the AMD die layout of the CPU, there's the two smaller CCD dies side by side (as shown above). So, with this mounting system, the probability of getting a poor mount or uneven mounting pressure side to side, is higher than with the original system. In a nutshell, depending on how the screws are tightened, there is potential for a uneven mount. To re-iterate, that's critical for AM5 CPUs like the 9950X with the side by side layout of the CCDs.
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With that in mind, James actually re-mounted the cooler using the older 2 point mount from Montech's original HyperFlow ARGB cooler, and ran the thermal tests again.
You can see above that reverting back to the ARGB mount with the Silent 360 has a significant impact on thermal performance. At maximum fan speed, using the HyperFlow ARGB mount brings the average temperature of the Silence 360 cooler down by a huge 7 degrees C, and that puts performance more in line with the original HyperFlow ARGB. It's ultimately the same story when the fan speed is lowered to 40 decibels noise output, where using the original ARGB mount on the Silent 360 brings the performance level of this new cooler in-line with the original ARGB cooler. That's what we were expecting from the outset considering both coolers use the same core design.
We reached out to Montech and explained what we'd found in terms of performance between the new Silent 360 and the original ARGB cooler. They then carried out some of their own testing and found similar results. Montech then set the following statement:
“After reviewing James’ feedback and conducting additional internal testing, we’ve identified that the poor AMD performance is largely due to the new mount.”
Montech went on to say:
“As a result, we’ve made the decision to hold all unshipped units and revert to the ARGB version’s original mount. For units that have already been shipped or are on store shelves, we will provide customers with the updated mount upon request—no questions asked—via rma@montechpc.com.”
At this point we felt we were fully able to share our findings with the readers and viewers and published the video review on Thursday 27th February. Commentary from the public seemed positive and the audience were happy that Montech were actioning possible replacements for these coolers to rectify performance issues on AMD platforms.
However, on Friday 28th February, Montech asked us if we could take the video review down as they wanted us to test a second unit, suggesting that our original model's radiator could have been damaged and that subsequent performance data indicated the issue could be more complex than just an update to the mounting system. We are quite confident based on checking the cooler extensively before testing that it has received no damage during shipping.
We were asked to wait for a replacement unit, with Montech's updated mounting system, as any customer will receive it when ordering online. Whether it will be exactly the same as the original ARGB cooler's mounting system, or if it will be tweaked in some way, we are unable to confirm until we receive a new unit ourselves.
For those customers who have a version of this cooler without an updated mount, you can still email Montech to get a replacement at the email address above, which will hopefully improve cooling performance on the AMD platforms.
Once we get the completely new revision from Montech, we can follow up on our testing so far, and report back to our audience. Right now, I would advise anyone even considering this cooler to wait a while longer until we get complete confirmation from Montech as to what is going on. As our data shows, buying one of these coolers for use with an AMD platform, with the current mount system, will not translate to great real world performance.
KitGuru says: Stay tuned for our update as we test a second sample from Montech, complete with the final mounting system.
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Montech HyperFlow Silent 360 AIO Cooler – IMPORTANT UPDATE first appeared on
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