Cooler Master’s Cosmos gaming cases are well-known for their extravagant carrying handles. The Cosmos SE is the smallest member of this line-up, selling for as low as $150 online. It has room for lots of fans and three radiators, attracting enthusiasts.
Until now, Cooler Master’s Cosmos line consisted exclusively of full-tower PC cases that distinguished themselves with sharp design elements and a lot of features. Great build quality wasn’t the only attribute landing Cosmos products in the high-end space, though. Prices from $250 to $400 for an enclosure made of steel, plastic, and in some cases aluminum certainly fit that category as well.
The Cosmos SE is the smallest offering in this line-up, and its family resemblance is immediately apparent. Nevertheless, it offers the same ostentatious curvy shape and carrying handles, supposedly able to support an entire system's weight.
Given that already-successful foundation, it's no surprise that the Cosmos SE gives off a good first impression. Cooler Master is clearly aiming for the upper echelon of buyer looking for high quality, but in a smaller form factor. That means this case exists in a more rarefied space than the company's own HAF portfolio.
There are currently two different versions of the Cosmos SE, both of which come in black. The first one has a side window, while the other sports mesh instead. We received the former for review.
What we want to know is just how much of that Cosmos DNA can you really cram into a $170 case? At least on paper, the prognosis is promising. You get enough room for up to eight hard drives or 16 SSDs, while 120, 280, and 360 mm radiators all fit at the same time (around back, up top, and in front, respectively). The case also features large and easily removable dust filters, along with blue LED lighting just waiting to illuminate your enthusiast-oriented gear.
Packaging and Accessories
The Cosmos SE’s packaging doesn’t rip easily due to its coating, and can consequently be reused to transport the case.

Cooler Master's box includes the expected assortment of screws needed to fill the chassis up with hardware. All of them (except for the motherboard spacers and the tool to install them) are black. The bundle also includes a number of cable ties, as well as eight rubber dampening pads and matching screws for installing two fans on the back of the hard drive cages.
The bundle is rounded out by an optional fitting for a security lock on the side of the case, a piezo speaker with a very long cable, and two large holders for a front-mounted radiator (which we'll talk about later). The manual explains the steps you'll follow in order to install various components. And it covers the case's less common features in sufficient depth, with clear and detailed illustrations.
Control Panel and Connectors
The Cosmos SE's front-panel connectivity is actually on top of the case. You get two USB 3.0 and two USB 2.0 ports, along with headphone output and microphone input. The audio I/O can be hooked up to your motherboard's AC'97 or HD Audio header.

The power and reset buttons are further back, behind the top ports and jacks. In addition, there's a button for turning the LED lighting on and off. All three provide a nice tactile feel, which I really like.
Technical Specifications
| Technical Specifications and Features | |
|---|---|
| Manufacturer | Cooler Master |
| Model | Cosmos SE |
| Type | Mid-Tower |
| Dimensions (HxWxD) | 57 x 26.4 x 52.5 cm |
| Weight | 10.8 kg or 23.8 lbs. |
| Material | Steel Aluminum (carrying handles) Plastic (front cover, top cover) |
| Form Factor | ATX, microATX, mini-ITX |
| Drive Bays | 3 x 5.25“ externally-accessible bays (the third is only useable after modifying the hard drive cage) 8 x 3.5“ internally-accessible bays (can also be used as 16 x 2.5“) 2 x 2.5“ internally-accessible bays |
| Expansion Slots | Seven |
| Fans | Front: 2 x 12 cm or 1 x 14 cm (Comes with 2 x 12 cm, 1200 RPM, blue lighting) Top: 2 x 12/14 cm (Comes with 1 x 14 cm, 1200 RPM) Back: 1 x 12 cm (Comes with 1 x 12 cm, 1200 RPM) Side (Version without side window): 1 x 12/14 cm Rear hard drive cage: 2 x 12 cm |
| Water Cooling (Optional) | Front: 36 cm radiator |
| Top: 28 cm radiator | |
| Back: 12 cm radiator | |
| CPU Cooler | Up to 17.5 cm |
| Graphics Card | Up to 27.6/39.5 cm (with/without hard drive cages) |
| Power Supply | Up to 28/41 cm including protruding cables (with/without hard drive cages) |
| Cable Management | Up to 3.4 cm between back of motherboard tray and pushed-out part of the side |
| Street Price | $170 (Selling on Newegg for $150) |




P.S. 15 kg one handed should not be a problem for you, bro do you even lift ? ;-D
Is it not the idea of using radiators is to avoid using tall CPU coolers? The biggest concern for watercooling in regards to the top radiator mount is clearing the tall memory heatsinks that some memory manufacturers use.
Is it not the idea of using radiators is to avoid using tall CPU coolers? The biggest concern for watercooling in regards to the top radiator mount is clearing the tall memory heatsinks that some memory manufacturers use.
True. Also, the heatsinks over the power section of the motherboard need to be considered. This usually becomes an issue with a lot case designs. A case with a motherboard that mounts too close to the top of the case itself is definitely a design flaw in the age of radiators and low-cost self-contained liquid coolers.
On the other hand extra features don't hurt, especially when they're executed well, and we all have to transport our desktop at some point, even if it's only once in a blue moon or when moving. On top of that, while smaller computers are getting feature parity fast, they can't quite measure up to something like this yet, and will never have the expandability of something this size.