Scan code: LN96654 Manufacturer code: MCB-NR400-KGNN-S00

CoolerMaster MasterBox NR400 Glass Micro Tower PC Gaming Case

Cooler Master MasterBox NR400 (w/o ODD), Black, MicroATX PC Case, w/ Tempered Glass Window, mATX/mITX, 2x 120mm Fans

Thumbnail 1 : CoolerMaster MasterBox NR400 Glass Micro Tower PC Gaming Case Thumbnail 2 : CoolerMaster MasterBox NR400 Glass Micro Tower PC Gaming Case Thumbnail 3 : CoolerMaster MasterBox NR400 Glass Micro Tower PC Gaming Case Thumbnail 4 : CoolerMaster MasterBox NR400 Glass Micro Tower PC Gaming Case CoolerMaster MasterBox NR400 Glass Micro Tower PC Gaming Case : video thumbnail 1
Scan code: LN96654 Manufacturer code: MCB-NR400-KGNN-S00
£69.98Item currently awaiting an ETA
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  • By DPD to your specified address. | £5.48 Receive SMS with one-hour delivery window Weekend, timed and European delivery options are available at checkout

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    Weekend, timed and European delivery options are available at checkout
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  • SCANPROTECT Protect against installation damage for 28 days. More info

    ScanProtect is an enhanced warranty specifically designed and offered by Scan to reduce the risk of any mishap or damage to components during installation.

    Our aim with ScanProtect is to encourage our customers to upgrade or build their own PC confidently. For a small additional fee our customers are provided with complete peace of mind.

  • 48HR REPLACEMENT If you need to return this item, your replacement will be dispatched within 2 working days of your product arriving back at Scan. More info

Cooler Master MasterBox NR400 Micro-Tower PC Case

Cooler Master MasterBox NR600 Midi Case

DESIGNED FOR SUPERB FUNCTIONALITY The MasterBox NR400 from Cooler Master applies optimal cooling and expandability to a minimalistic, subtle design. The front and top panel are designed to deliver optimized airflow to enhance your PC performance. This innovative case blends together functionality and compact design to offer a place to store your components that maximizes internal space and implements subtle design. The NR400 features a beautiful tempered glass side panel so you can view all your components, with convenient thumbscrews for easy installation/removal. Enjoy space for storage and a variety of cooling options in an optimized, compact form.

Effortlessly Keep your System Cool

front panel

OPTIMIZED HIGH-AIRFLOW FRONT PANEL The MasterBox NR400 offers a pure and simple design that focuses mainly on optimizing the airflow to your internal components. A single-layer, fine mesh makes up the entire front panel, providing incredible airflow while also acting as a dust filter to keep out unwanted dirt and dust.

Make your System a Spectacular Display

tempered glass

SEAMLESS TEMPERED-GLASS SIDE PANEL The tempered-glass side panel of the MasterBox NR400 sits completely flush against the chassis, and is mounted securely and discreetly by a system of tabs and thumbscrews. When installed, your system delivers a totally seamless look that is completely smooth, giving you the power to impress any PC building enthusiast.

Compact yet Versatile Cooling Options

air support

SUPERIOR AIR COOLING The Cooler Master MasterBox NR400 reigns supreme when it comes to cooling solutions. It can house 140mm x 2/120mm x 3 fans on the front of the case, 140mm x 2/ 120mm x 2 fans on the top of the case and a 120mm fan on the rear to deliver cool and direct airflow throughout the interior of your system. This innovative case comes with two 120mm fans, one front fan and one exhaust fan.

radiator support

NUMEROUS RADIATOR SUPPORT OPTIONS The cooling power doesn't stop there as the MasterBox NR400 has the ability to house radiators in the front ranging from 120mm all the way up to 280mm, a 120mm or 140mm in the top and a 120mm radiator on the rear, giving you unparalleled cooling power.

Effective Storage Space for your Build

tool less mounting system

EASY-TO-USE TOOL-LESS MOUNTING SYSTEM A total of 4 x 2.5" and 3 x 3.5" drives can be mounted using an innovative tool-less system. Mount them on the PSU shroud, behind the motherboard tray and in the HDD cage to give your PC superior storage capabilities.
*An extra 3.5" drive can be mounted only on the ODD version (pictured).

One Dedicated Port for all of your Audio

headset jack

SINGLE 4 POLE HEADSET JACK The single 4-pole headset jack offers both audio and microphone capabilities, eliminating the need for separate jacks.

Space for your Dream High-End Gear

gpu clearance

EXTENDED GPU SUPPORT Generous clearance space in the MasterBox NR400 provides up to 346mm of room to support the latest graphics cards so you can build your high-end dream PC.

Make Room for Whatever you Need

headset jack

MOVEABLE HDD CAGE The HDD cage is both removable and moveable so you can shift the whole thing forward to make room for a longer PSU, backwards for radiator space, or completely remove it if HDD storage is not needed.

View the Superb Features of Cooler Master's MasterBox NR400

nr400 video
Core Chassis Specifications
Case Edition MasterBox NR400 (without ODD)
Case Form Factor MicroATX
Motherboard Form Factor
  • MicroATX
  • Mini-ITX
I/O, Bays & Expansion
Front/Side/Top Panel I/O
  • 1 x Headphone/Mic Combo
  • 2 x USB 3.0
Drive Bays
  • 4 x 2.5" Internal
  • 3 x 3.5" Internal
Standard Expansion Slots 4
Vertical Expansion Slots  
Fans & Filters
Fan Bays
  • 1 x 120mm
  • 5 x 120mm / 4x 140mm
Fans Included 2 x 120mm
Fan Controller/Hub  
Dust Filters
  • Bottom
  • Top
Liquid Cooling Support
Front Radiator Compatibility 1 x 120/140/240/280mm
Top Radiator Compatibility 1 x 120mm
Bottom Radiator Compatibility  
Rear Radiator Compatibility 1 x 120mm
Side Radiator Compatibility  
Max CPU Cooler Height 166 mm
Max GPU Card Length 346 mm
Cable Routing Space 22mm Behind Motherboard Tray mm
Side Panels
Window/s Yes
Window Configuration 1 x Main Side
Window Construction Tempered Glass
LED Lighting Functionality
LED Lighting No
LED Lighting Emitters  
LED Lighting Colour  
LED Lighting Support & Control  
Power Supply Compatibility
PSU Included No
PSU Wattage (If Included)  
PSU 80+ Rating (If Included)  
PSU Support ATX
PSU Mounting Location Bottom Mount, Rear
Max PSU Length 140/325 mm
Chassis Physical Specifications
Colour Black
Chassis Construction Materials Steel / Plastic
Dimensions 210 x 411 x 411 (WxHxD mm)
Weight 5.56 kg (Approx)
Please Note  
Additional Information
Scan Code LN96654
Model Number MCB-NR400-KGNN-S00
GTIN 4719512080276

Please note your statutory rights are not affected.

For further information regarding Scan's warranty procedure please see our terms and conditions

24 months
Return to base
DOA Period:
28 days
RTB Period:
24 months
Manufacturer Contact Details
0871 472 4747
Cooler Master MasterBox NR400 (w/o ODD), Black, MicroATX PC Case, w/ Tempered Glass Window, mATX/mITX, 2x 120mm Fans is rated 5.0 out of 5 by 3.
Rated 5 out of 5 by from Good value case This is a nice well presented case, it has decent enough cable management, plenty of routes to keep your PC tidy, the tempered glass side panel is nice. It has adequate ventilation and have not experienced any thermals outside of what I expect. the quality is good and on price point.
Date published: 2020-07-12
Rated 5 out of 5 by from Great product and easy to build with Great m-atx case easy to build in. Can fit most big graphics and psu's. Comes with 2 fans installed. 1 front and 1 back. The Case is well ventilated and keeps dust out.
Date published: 2020-07-08
Rated 5 out of 5 by from Budget Case = Fantastic Value This is my first case from CoolerMaster and it will be my last. Not because it is bad and awful for cable managment, which may I add it has plenty of room back their or that it has knocked 10 degrees of cpu temps. Quite simply I will not need another case ever again. This case deserves a review because CoolerMaster have not ripped off the consumer. Granted their is parts of the case that is budget metal, but I say this, when are you going to touch the insides again after a build? When a case like this has been designed and thought out for a mATX or in my case ITX and can take a 280mm rad up front which is the best placement for a CPU rad. My system specs; CPU: i7 8700k 5GHz Vcore 1.275v CPU Cooler: NZXT X62 280mm Motherboard: Asus Z370-I Gaming Graphics: Palit GTX 1070 Super Jetstream Ram: 16GB 3000MHz PSU: EVGA 850W Supernova It's alot crammed in their but this case deals with it and more with the 4 ssd mounting points nicely designed with the rubber grommets no tool fixing points. Mechanical 3.5" drive I have one their is space for 3 I think in the cage at the bottom and their lies my problem one minor problem which was easily solved because their are holes that may have been put their for this purpose of not having enough room because of the PSU cables getting in the way were you can screw your hdd were the cage normally goes. If you have a rather large PSU like I have with standard bulky cables the hard drive cage ain't going to fit especially with a rad up front but other than that no problem. A smaller form factor PSU like SFX would probaly do the trick or those fancy slim line PSU cables will fix the issue. If you have read up to here without skipping to this point well done enjoy your purchase.
Date published: 2020-05-08
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Is the version with ODD available?

Asked by: acrossuk81
Unfortunately this model does not support ODD. Our Technical Sales team would be able to advise a suitable alternative to support this.
Answered by: DavidScan
Date published: 2020-07-30
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CoolerMaster MasterBox NR400 Glass Micro Tower PC Gaming Case
CoolerMaster MasterBox NR400 Glass Micro Tower PC Gaming Case