Coolermaster Cosmos S ATX Case Review

Cases & PSU/Cases by jmke @ 2008-03-03

It did not take Coolermaster long to update their high end chassis, the Cosmos S is based on the Cosmos, but made from aluminum, more cooling options, comes with a massive 200mm fan and has a very unique I/O panel. We compare this S(port) version to the original to see how it stacks up.

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Installation detailed


The Cosmos S is a large case, made to fit E-ATX motherboards, using a standard ATX system gives you plenty of room to maneuver inside, the extra tool less features make installation a breeze and it will be over before you know it.

Most time will be spend with the hard drive bay which requires quite a bit of screws (4x per HDD, 4x for the bay).

The Cosmos S doesn’t come with a fancy goodies bag as the original Cosmos, which even had a custom screwdriver set:

Original Cosmos goodies bag contents:

No the Cosmos S has a rather standard looking content package, a detailed instruction manual, cable guiders and a bunch of screws:

Madshrimps (c)

Wait, there’s a cable there in that photo, an 8-pin extender cable, that will come in handy for hooking up your motherboard while keeping the cable hidden.

In the original Cosmos review we tried to route our cable like this:

But this prevented the side panel from closing properly. We are happy to report that the Cosmos S does allow you to route the 8-pin cable through the back as there is more room and better placed cut-outs and holes.

Another small change to the product design is the power supply area; the original PSU setup was like this:

If you install your PSU with its fan facing downward, allowing it to draw fresh air from outside the case, you might end up with one dusty PSU. Coolermaster must have thought the same:

Madshrimps (c)

Pictures say more than words; here’s the installed shot of the Cosmos vs Cosmos S


Cosmos S

You can notice cable routing improvements in several areas, the large 24-pin ATX cable is now hidden at the back and with the 24-pin pass-through on Cosmos S (for the touch sensitive power button) you don’t need a very long PSU cable to do it either. The 8-pin is now properly routed too. The 2x6-pin for VGA are also out of sight; The SATA cables make a return as the original Cosmos had their connection at the right side panel, here they are slightly more visible.

Time for stress testing ->
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Comment from Kougar @ 2008/03/05
Great review, thank you for the detailed photos. Best review I've read of the case... Any idea if they offer extra drive cages separately? They should of at least included a 2nd one for the price...

As much as I am liking this case for how well it fits my needs, the price is a bit to high to swallow. Might at well look at the MountainMod designs, as they start at the same price.
Comment from jmke @ 2008/03/07
Yes the HDD bay module is available separately from Coolermaster (since Stacker series already), but not all retailers carry this product afaik.

Saw some Cosmos cases at cases with custom paint job, for a nice $900
Comment from nexeternus @ 2008/03/23
I've posted this question in other forums, nobody seems to know the answer to it, or does not want to answer. This is my 1st post here, and let me just say madshrimps has the most excellent case reviews I've read, I just like the size comparison charts which gives a very good idea how large the cases being reviewed are!

so here is my question.
Does the biometric power button work like a regular power button when held down. wherein it forces hard shutdown when within windows.

I asked because it just occured to me that it has no reset button, meaning I'd have to flip the switch in my PSU, then I realized my PSU the corsair 520HX does not have a switch. I just wondered what I had to do if my windows locks up. I'd not like to have to unplug it from the wall.
Comment from jmke @ 2008/03/23
welcome to the forums!

yes, if you hold your finger on the button it's the same as with a normal power button; as long as you keep your finger on the button it will be in the "on" state and holding it for 4-5 seconds will hard shutdown your system.
Comment from nexeternus @ 2008/03/23
At last!! Mwahahahaha!! Thanks jkme for your response, and glad to be here.
Comment from Morentho @ 2008/05/05
Thank you for the best Cosmos S review on the web!

Can you please tell us what fan controller you used on page 5 of the review?

"...The brighter red light comes from our 5.25” fan controller we installed..."

I am a neat freak and as this is a red-light themed case I would like a nice red led fan controller.

Comment from jmke @ 2008/05/05
this one:
Sunbeamtech 5.25" Fan Controller, it's RED because it's feeding the fans less than 7v, at 7v+ the LEDs turn bright BLUE. so do take that into account.
Also the leds are very bright when lit up blue and might be blinding

You can dim them a bit using a method like mentioned here: