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Test Results ~ with NVIDIA 8800 GTX
As we continue our testing with this same setup our test data increases, we’ve marked the new entrees in the chart with a * in front of the product name to help them stand out.
With five different fan locations, two of them supporting 120 and 140mm fans, there are plenty of combinations possible, we’ve limited our testing to the following setups:
- All four 120mm fans in their default location at high speed
- The bottom fan moved to the HDD bay, all fans at high
- All fans off, except for the rear 120mm exhaust, which is running at high
We compare the noise and temperature readings with these cases, selecting those fan configurations most comparable in noise: Antec Nine Hundred, Coolermaster Stacker 830 EVO, Coolermaster CM690, Silverstone TJ-09, Ultra Grid, Sunbeamtech 3D Storm, NZXT Adamas, Zirconium RT-201 and Antec P182B.

The first setup with all fans running at high speed delivers the best results for the video card temperature, the bottom fan blowing cool air towards the VGA makes a noticeable difference. Not in chart, but also tested was the impact of the VGA duct, we found that without the duct the VGA temp would rise ~2°C, so it’s definitely worth it to have it installed. Noise wise, with all fans running the outcome is far from bad, at 43.1dBA the case is noticeable in a quiet room, but not disturbing for everyday work. High pitched noises are muffled by the thick side panels, so HDD spin up/down noise is kept to a minimum.
HDD temperatures with the default configuration are among the highest in the chart, at ~40°C it’s clear the hard drives are not cooled enough, we only had 2 installed, if you fill all the bays you definitely need active cooling. In that case you should move the bottom in-take fan on top of the HDD bay, doing so dropped HDD temps by 9°C in our tests, good enough!
The last stress test with minimal case cooling (one rear exhaust) gave average results at best, while quieter than most mid-sized tower coolers, the VGA and CPU temperatures are noticeably higher, most worrisome are the HDD temps though, at 47°C it’s not advised to keep the system running stressed without active HDD cooling.
Conclusive Thoughts
The latest high end ATX case from Coolermaster will set you back ~$170 / ~€190, whether this investment is worth it depends on your taste. The visual aspect of the Cosmos is without a doubt unique in the market, it remains sleek but incorporates some flashy design choices, the handle bars do stand out.
Internal design and features are excellent with working tool-less HD/Optical Drive bays, functional VGA air duct and enough room to fit the highest end hardware. Cooling wise the case doesn’t disappoint with four 120mm fans pre-installed, the only area which needs attention is the HDD bay, without active cooling things will heat up there.
Overall we found the Cosmos to be of high build quality with good noise reduction features, the high premium price does put a damper on the fun as more affordable cases challenge the Cosmos on the cooling and noise front, but none have its distinct look.

We thank Coolermaster for the opportunity to test their latest, hope you found the review useful, until next time!
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