Cooler Master Cosmos SE Full Tower Computer Case - M/B Compatibility(ATX, MicroATX, MiniITX), 13x Drive Bays, 7x Expansion Slots, 4x USB 2.0/3.0, 8x supported Fans, 4x Fans Installed - COS-500

Item#:  9842123  | Model#: COS-5000-KWN1

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Cooler Master Cosmos SE Full Tower Computer Case Product Details

Full Tower Desktop 13 Bays
140 mm. Fan USB 3.0

Cooler Master COSMOS SE Computer Case 
If getting your PC installed has been on your mind, the Cooler Master COSMOS SE Computer Case is the best bet. This amazing mid-tower computer case can support ATX , mini-ITX, and Micro ATX motherboards. It features supercar inspired design with aluminum curve handles. It is further equipped with 3 x 5.25 in. external drive bays and 8 x 3.5 in. internal drive bays to accommodate more storage or optical drives with ease. With seven expansion slots, you can easily mount add-on cards without any hassle. Its USB 3.0 high-speed front ports allow you to conveniently connect various USB devices. Grab the Cooler Master COSMOS SE Computer Case now!

What It Is And Why You Need It:

  • Three 5.25 in. and eight 3.5 in. drive bays; allow easy accommodation of storage or optical drives 
  • Seven expansion slots; enable you to mount add-on cards with ease
  • USB 3.0 front ports; ensure high-speed transfer rates along with backward compatibility
  • Three 120 mm. fans and one 140 mm. fan; regulate temperature by effectively dissipating heat


Cosmos SE is the successor to Cooler Master's flagship Cosmos II Ultra Tower Computer Case. It delivers the classic race car look and feel of its predecessor in a smaller, mid tower package. Rails forged of aluminum provide sturdy handles for transporting your system. Although smaller compared to Cosmos II, SE still exhibits high-end features such as expansive support for all-in-one water cooling systems and hard drive storage. With the ability to install up to 8 cooling fans or 3 radiators at once, Cosmos SE is capable of housing extremely powerful cooling components.



Cosmos SE continues a lineage of classic design inspired by the supercars of today. Curved aluminum handles, sleek lines, and stylish blue LED accents provide a truly premium aesthetic.

Cosmos SE is capable of supporting up to 3 radiators at once, including a 120mm in the rear, 240/280mm on top, and a 360mm at the front. Cosmos SE allows you to pack massive cooling power in a perfectly sized enclosure.



Uniquely designed combo trays can hold 2 SSDs each, providing support for up to 16 SSDs or 8 HDDs in the hard drive cages. Two additional SSD mounting points are located on the backside of the main drive cage, allowing for a total of 18 SSDs.

A nice, clean setup is important for any high-end build. With Cosmos SE, you've got ample space to neatly store any loose cables with approximately 34mm (1.3 inch) of cable management space.

What's Included?

Cosmos SE Computer Case

HDD Brackets

Accessory Pack

User Guide

Which Cooler Master Cosmos Computer Case is Right for You?

This Model

Cosmos SE

Cosmos II


ATX Tower

Ultra Tower

Motherboard Support

Up to ATX

Up to XL-ATX


10.4 x 22.4 x 20.6 inch

13.5 x 27.7 x 26.1 inch

Maximum Number of
SSDs Supported



Maximum Number of
HDDs Supported



Fan Support

Top: 120 / 140mm x 2

Front: 120mm x 2 or 140mm x 1

Rear: 120mm x 1

HDD: 120mm x 2

Top: 120mm x 3

140mm x 2

200mm x 1

Front: 120 / 140 / 200mm x 1

Rear: 140mm x 1

Side: 120mm x 2

Middle HDD: 120mm x 1

Bottom HDD: 120mm x 2

Radiator Support

Top: 240 / 280mm x 1

Rear: 120mm x 1

Front: 360mm x 1

Top: 240mm x 1

Bottom: 240mm x 1

Aluminum Carrying Handles

Removable Dust Filters

Cosmos SE Compatible Products


High Performance
CPU Air Cooler

Glacer 240L

All-in-One Water
Cooling System


1000W 80 PLUS Gold
Fully Modular Power Supply

  • Manufactured by: Cooler Master
    Warranty provided by: Cooler Master
    UPC No: 884102025198
    Mfg Part No: COS-5000-KWN1
  • Box Size: ( Length:23, Width:3, Depth:17)
    Shipping Weight: 28.6500 pound(s)
    Click here for full warranty and support information
  • Cooler Master logos are registered trademarks of Cooler Master. All others trademarks and copyrights mentioned herein are the property of their respective owners.
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