Cooler Master COSMOS S Chassis

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It's not very often that we see innovation in a PC chassis.  Of course, just about every other component in a typical PC is enhanced or somehow improved on a regular basis, but chassis haven't really changed all that much in the last few years.  Aesthetically they have gotten more pleasing and diverse, new materials are being used, and there have been some acoustic improvements mostly due to the use of larger, low-RPM fans.  However, take away the fans and fascias and underneath most chassis are pretty similar.  In fact, it's not uncommon for the same chassis to be sold as numerous different models, just with different bezels on the front.

The folks at Cooler Master thouggh have made some significant strides as of late, in an effort to differentiate their products.  The Cooler Master COSMOS, was widely regarded as one of the best full towers available.  We even saw the COSMOS used for a handful of builds by Intel and NVIDIA at press events, which is a testament to its quality.  As good as the COSMOS is though, Cooler Master saw fit to further improve its design and have since released the COSMOS S.

The COSMOS S borrows from the original COSMOS design, but adds some innovative new features like touch sensitive controls, lighted inputs, and a more durable finish.

The Cooler Master COSMOS S Chassis

Cooler Master COSMOS S Chassis
Specifications and Features

Available Color Black
Dimension (W / H / D) (W) 266 x (H) 598 x (D) 628mm
Weight Net Weight: 13.8 kg; Gross Weight: 17.8 kg
Material Chassis: Al. Appearance: Al (side panel: 1.5mm)
Motherboards Extended ATX, ATX
5.25" Drive Bay 7(Exposed)
3.5" Drive Bay 4(Hidden, converted from 3x5.25 inch drive bays)
I/O Panel USB 2.0 x 4, IEEE 1394 x 1, eSATA x 1, MIC x 1, Audio x 1(support Intel HD / AC 97 audio)
Expansion Slots 7 slots
Cooling System Front fan(intake): one 120x120x25mm, 1200 rpm, 17 dBA (included),
Top fan(exhaust): one 120x120x25mm, 1200 rpm, 17 dBA (included),
Top fan: 120mm x 2(optional),
Rear fan(exhaust): one 120x120x25mm, 1200 rpm, 17 dBA (included),
Side fan(intake): 200x230x30mm, 900 rpm, 150 CFM(included)
Power Supply Standard ATX PS2 / EPS 12V (optional)
Optional Component Transparent side panel,
Fan bracket
Other Keep-out requirement for CPU cooler installation:,
At least 5.7 inch(145mm) separation between motherboard and the side panel of COSMOS S


The Cooler Master COSMOS S came packaged in a large double-walled box.  Like virtually every other case, the COSMOS S chassis itself is secured in position in the box by large pieces of Styrofoam and the entire case is wrapped in a plastic bag.  In addition, the chassis is tucked into a reusable cloth sack, to prevent dust from getting onto the chassis during shipping.  The high-quality cloth sack certainly added to the product's out-of-the-box appeal.

Additional accessories for the case, like the power cord, wire ties, adhesive wire tie downs, screws, and the manual were secured inside the chassis itself.  The wire tie downs included with the COSMOS S were a nice touch, because they'll make it easier for users to manage the typical rat's nest of cables that reside inside a high-end PC, without having to make an additional purchase.

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AjayD 6 years ago

Once again, another thoroughly excellent review by HotHardware. This case looks like a real beauty, not to mention the extensive cooling options. That side panel fan is a monster. I have been looking at various cases on newegg recently and this seems to offer the best combination of style, cooling, space and features of any I have seen.

By the way, I didn't know you had another Skulltrail lying around. When you gave away the last, I was thinking if it were me, I would have been a little more reluctant to let that baby go. I guess having another made it a little less painful to say goodbye. I would imagine giving away the Beast fits in somewhere right along with marrying off a daughter.

Anonymous 6 years ago

This is my new favorite case. If it is still around when I build a system next year this is the one i want. Unless of course I win the HH giveaway heh.

imAcpufan 6 years ago
I'm seriously thinking of getting this case. I'd like to get the clear side panel that cooler master has on their website, but I haven't seen it available anywhere yet.
ice91785 6 years ago

I am a little behind....I just read the article; I am just curious -- did the USB LEDs serve a good purpose? I mean was it a 'cool effect' or somehing that was actually useful....Also you mentioned that the drives didn't seem to be well fastened with the snap-plugs -- what if a rubber vibration absorber (don't know of a better term to use) was used...or is there just a lot of give/open space with the drive(s) in?

It is a really sexy-sleek looking case though.....for over $200 I will probably wait off on it however. I will admit that after reading the article I though "Wow I am going to go get one of these!!" and then I saw the price tag Sad 

amdcrankitup 6 years ago
AjayD 6 years ago

My favorite case of any I have seen is the Zalman Z Machine GT1000. I especially like the hard drive mounting system and the thickness of the aluminum used. The only downsides are the price and the lack of fans. Here is a wonderful review for anyone who missed it.

Zalman Z-Machine GT1000


I think I like the CM Stacker 830 Evo better than the Cosmos S after comparing the two. What do you guys think?

amdcrankitup 6 years ago

Another good looking case I think is this Thermaltake.

frg1 6 years ago

 like the titanuim and black finish

ice_73 6 years ago

 i actually prefer the tt armor case, but this is one heck of a case reminds me alot of the armor, but this one has better airflow. the bars on the bottom are logical since they help psu airflow, but what about the bars on top? do they have a reason or is it just for looks? 

higgamo 6 years ago

[quote user="ice_73"]

 i actually prefer the tt armor case, but this is one heck of a case reminds me alot of the armor, but this one has better airflow. the bars on the bottom are logical since they help psu airflow, but what about the bars on top? do they have a reason or is it just for looks? 


i think the top bars may be for adding an exterior water cooling, and for easy movement of the case. that the only thing i can think of. 

SqUiD267 6 years ago

 I didnt notic the front part of this case looked so nice. And touch sensitive keys? You guys sure do make a great review

rapid1 6 years ago

Very nice case I like this one and the 830 rs the best out of all cases. Great cooling and construction they seem to have taken anything into account one full tower system.

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