Disclaimer: Displayed parts and accessories may not be included in the actual product package.


The N Series stands apart from the competition. It does so with a full array of exciting options that have been designed specifically with cooling performance in mind, especially liquid cooling. Its full mesh front panels and well-ventilated layout provide for a more abundant flow of air throughout the case.

  • Full mesh on the front panel
  • Supports a 240mm liquid cooling radiator on the right side or top of chassis (fitment may vary based on the size and design of your motherboard)
  • Supports up to 3 SSDs – 2 on the tool-less 2.5” cage, 1 at the bottom of HDD cage
  • Supports a 120mm liquid cooling radiator in the rear
  • Includes two XtraFlo 120 fans (no LED) arranged for optimum airflow with support for up to 8 fans
  • One optional 120/140mm fan can be installed on the left side panel to cool the graphics cards
  • Supports high-end graphics cards up to 320mm / 12.6 inch, including NVIDIA GTX 690 & AMD HD 7990
  • Dual Super Speed USB 3.0
  • Supports up to 8 HDDs (2 tool-less)
  • 3 dust filters (top, right side panel, PSU) for easy maintenance





















Model NSE-400-KKN2
Color Midnight Black
Material Polymer, mesh front bezel
Dimension 190 x 426 x 501.4 mm / 7.5 x 16.7 x 19.7 inch
Weight 5.6 kg / 12.3 lbs (net)
M/B Type microATX, ATX
5.25" Drive Bay 2 (exposed)
3.5" Drive Bay 8 (1 exposed, 7 hidden)
2.5" Drive Bay 3 (hidden)
I/O Panel USB 3.0 x 2 (int.), USB 2.0 x 2, Mic x 1, Audio x 1 (supports AC97 / HD Audio)
Expansion Slots 7
Cooling System Top: 120mm fan x 2 (optional)

Front: 120mm fan x 2 (one white LED XtraFlo fan installed, one optional) - for KKN1/KWN1; with no LED XtraFlo - for KKN2/KWN2

Rear: 120mm XtraFlo fan (no LED) x 1 (installed)

Left Side: 120/140mm fan x 1 (optional) - for KKN1 / KKN2 only

Right Side: 120mm fan x 2 (optional)
Power Supply Standard ATX PS2 (optional)
Maximum Compatibility VGA card length: 320mm / 12.6 inch
CPU cooler height: 164mm / 6.4 inch
Warranty 2 years
UPC Code 884102023293
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    • Click logo to read full review:
      OCC: Silver
      overclockersclub.com : December 2013

      "The fit, finish, and build quality are all consistent with Cooler Master's high standards. Pricing is comparable to other cases with similar features and is currently available at NewEgg for $59.99. The N400 gives you affordable space, functionality, room for expansion, a variety of cooling options, and classic Cooler Master styling."

      » Details
      Aphnetworks.com : October 2013

      "In the end, the Cooler Master N400 hits all the right notes, even with a compact size......It is quite easy to see that the N400 is fully capable of any basic computing needs and is worth every penny of the current retail price of $59.99; possibly even more."

      » Details
      Legitreviews.com:  Value Award
      legitreviews.com : August 2013

      "The Cooler Master N400 has many options to cool your components, ranging from simple 120mm or 140mm fans to installing 120mm or 240mm water blocks.  The overall design of the N400 is very simplistic, while still looking like a more expensive case with just enough flash for it to look great......Cooler Master’s N400 is a budget friendly mid-tower case that offers compatibility with advanced features."

      » Details
      Modders-inc: Recommended Hardware
      modders-inc.com : July 2013

      Given the price of the Cooler Master N400 gaming computer case we have been overall amazed by not only the features of the case but the options left to the user......The case is light enough that it can be take to friends or LAN parties and with its clean built and low price point, this is a great case for someone looking to upgrade their current case or building a new system on without killing your budget."

      » Details

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