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Our testing methods
Here are the specifications of our test system:

Processor Intel Core i7-6700K
Motherboard ASRock Z170 Extreme7+
Memory 16GB (2x8GB) G.Skill Trident Z DDR4-3000
Graphics card Sapphire Radeon R9 380X
Storage OCZ Vector 180 480GB SSD
WD Black 1TB HDD
Power supply Cooler Master V550
CPU cooler Cooler Master MasterLiquid 120
OS Windows 10 Pro

Our thanks to Intel, ASRock, G.Skill, Gigabyte, Kingston, WD, and Cooler Master for their contributions to our test system. Our thanks to Cooler Master for providing the case we're testing today, as well.

Our case-testing cycle consists of the following phases:

  • 10 minutes idling at the Windows 10 desktop
  • 10 minutes running the Prime95 CPU torture test
  • 10 minutes running the Prime95 CPU torture test and the Unigine Heaven GPU torture test
  • 10 minutes idling at the Windows 10 desktop

Cooling performance
Here are the results of our cooling tests, plotted over time:

And here are some minimum and maximum temperatures from each testing phase:

Let's talk temps. Testing temperatures at idle with and without the vents open showed little difference. In fact, the vents seemed to make cooling performance slightly worse overall. I tested the case twice to ensure this data was not a fluke. When idling, it seems to be warmer with the vents open. Under full load, this case succeeded on keeping the components below any dangerous or damaging levels.

Our load tests show how opening the vents strangely increase temperatures, but only slightly. The difference in performance between opening the vents and closing them would probably go unnoticed unless you run a temperature log like we do. Although the idea behind the vents is interesting, they ultimately don’t have a meaningful effect on performance with our setup.

Noise levels

With my test system at idle, the noise emitting from the case was acceptable with the vents open as well as closed. At full load, i was still in my comfort range. The vents being open or closed, didn’t seem to make much of a difference in the sound levels I perceived at any point through the tests. I would describe the noise character of the case as a smooth hum at idle as well as under load. When the fans kick into high gear under load, you can hear the increased noise levels, but I didn’t feel it was prominent enough to annoy or distract the user. The MasterCase Pro 6 should serve well as a quiet host for a gaming rig.