Temperature behavior
Now we come to the temperature behavior and before questions are raised again, I want to explain again why the same hardware is not used for every test and why tests are often carried out with relatively low power limits. First of all, of course, not all testers have an i9 1x900K at their disposal that can be turned up to the meltdown point, and sometimes you just have to use whatever is available at the time. With our “distributed” way of working, with different testers and different hardware, it is de facto impossible to realize absolutely consistent comparison tests. And in practice, this is actually invalid because even a different fan configuration in a case can lead to completely different results. And if you don’t want to test for years with a hopelessly outdated test system that has long since lost its relevance, you would have to retest all cases with fresh hardware at regular intervals. To do this, you would have to rent a warehouse to store all the cases and by the second re-test at the latest, nine out of ten tested cases would no longer even be on the market. I therefore try to provide as objective an assessment of the cases as possible in my tests by evaluating any pre-installed fans and checking whether any anomalies occur with regard to temperatures. I also try to realize scenarios that are reasonably close to practice. For example, the topic of “brand loyalty” is always a point of contention and it is often the case that customers who buy a case from manufacturer XY often also buy a power supply or cooling solution from the same manufacturer if these are available. I hope that this can clarify some of the questions that otherwise keep cropping up.
Test system:
The well-known B550 platform and Ryzen 9 3900X were once again used as the test system. Unfortunately, I don’t have a black graphics card available at the moment, so I had to fall back on the RX 7700XT again. For comparison purposes, however, it’s not a bad idea to use the same system frequently.
General conditions:
AIO fans: 750rpm
Case fans: 750rpm
Pump: 1800rpm
Room temperature: 21.3°C
CPU Torture
For the CPU stress test, I again used Cinebench R23 in continuous loop. For almost the entire test, 145W was applied to maintain an allcore boost of ~4000-4025MHz (PBO on). The average temperature of the 3900X was 80.5°C, although the limitation here was the 240mm AIO used and not the Masterbox 600.
Gaming workload
Borderlands 3 was again used for the gaming test, as it practically fully utilizes the graphics card throughout and therefore generates a lot of waste heat. Especially with AIOs mounted in the lid, this has a significant effect on the CPU temperature, as the waste heat from the graphics card is transported outside through the radiator. A lot of compiling obviously has to be done at the start of the game, which is why there was a brief rise in temperature to almost 70°C, after which the CPU stabilized in the mid 50°C range.
The graphics card can’t make the Masterbox 600 break a sweat either. Although it remained at the specified temperature limit of 60°C for almost the entire test period, the fans only had to run at just over 1500rpm.
The HotSpot was nailed down and absolutely harmless.
Interim conclusion
Basically, the temperatures in the 600 Masterbox can be described as rock solid. Thanks to the size and the decent Aiflow, good results can be achieved. Unfortunately, the pre-assembled case fans are anything but quiet and therefore only really bearable at very low speeds, which is why they were turned down to approx. 600rpm after the test. At a sitting distance of approx. 1m, they are then only very slightly audible. It’s a shame that CoolerMaster installs a 3-pin fan in the rear, which can’t be regulated at all via the included PWM splitter and therefore always runs at “full throttle” – a stupid solution! To keep my blood from running out of my ears during the test, I connected the fan separately to the board and regulated it down to the test speed. In view of the quality and volume of the fans, I would, if at all, opt for the “Lite” version of the Masterbox 600, which will be available without pre-installed fans for around €79.
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