Cooler Master MasterBox NR400 Mini-Tower Case

BH #COMCBNR400KG • MFR #MCB-NR400-KG5N-S00
Cooler Master MasterBox NR400 Mini-Tower Case
Key Features
  • Micro-ATX and Mini-ITX Support
  • Steel, Plastic, & Tempered Glass
  • 1 x 5.25" Drive Bay
  • 4 x 3.5" Drive Bays
The MasterBox NR400 Mini-Tower Case from Cooler Master features a minimalistic design with plenty of cooling potential and expandability options. It's made from steel and plastic, complete with a tempered-glass window panel, supporting up to Micro-ATX-sized motherboards. Aside from plenty of storage drives, it also has room for up to four PCIe expansion cards. At the top of the case are two USB 3.0 Type-A ports and a single 4-pole headset jack for audio-out and microphone connectivity.
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Expected availability: 2-4 weeks
$74.99
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Cooler Master NR400 Overview

  • 1Description
  • 2Front Panel
  • 3Storage Support
  • 4Headset Jack
  • 5Fan Support

The MasterBox NR400 Mini-Tower Case from Cooler Master features a minimalistic design with plenty of cooling potential and expandability options. It's made from steel and plastic, complete with a tempered-glass window panel, supporting up to Micro-ATX-sized motherboards. Aside from plenty of storage drives, it also has room for up to four PCIe expansion cards. At the top of the case are two USB 3.0 Type-A ports and a single 4-pole headset jack for audio-out and microphone connectivity.

Front Panel

The front panel of this case is made of a single layer of fine mesh, which allows for airflow and doubles as a dust filter.

Storage Support

This case has a total of four 2.5" and four 3.5" drive mounting bays located on the PSU shroud, behind the motherboard tray, and in the HDD cage.

Headset Jack

A single 4-pole headset jack supports both audio and microphone, so separate jacks are not required.

Fan Support

The front of this case supports up to two 120mm or two 140mm fans while the top supports one 120mm or 140mm fan. This case comes with two 120mm fans preinstalled at the front and back.
UPC: 884102052750

Cooler Master NR400 Specs

Compatibility
Motherboard SupportMicro-ATX, Mini-ITX
External Drive Bays1 x 5.25"
Internal Drive Bays4 x 3.5"

4 x 2.5"
Expansion Slots4 x Full Height
Maximum GPU Length13.62" / 346 mm
CPU Cooler Height6.54" / 166 mm
Supported PSU SizeATX
Maximum PSU Length12.80" / 325 mm
PSU Mounting LocationBottom
Cooling
Fan Mounting (Front)2 x 120 mm

2 x 140 mm
Or
Fan Mounting (Rear)1 x 120 mm
Fan Mounting (Side)None
Fan Mounting (Top)1 x 120 mm

1 x 140 mm
Or
Fan Mounting (Bottom)None
Fans Included (Front)1 x 120 mm
Fans Included (Rear)1 x 120 mm
Maximum Radiator Size (Front)280 mm
Maximum Radiator Size (Rear)120 mm
Maximum Radiator Size (Top)120 mm
Fan Mounting (Internal)None
Fan Controller IncludedNo
Filter LocationsBottom, Top
I/O
Connections2 x USB Type-A (USB 3.1 / USB 3.2 Gen 1)
Audio Connections1 x 3.5 mm Input/Output
Display ConnectionsNone
Physical
Windowed PanelYes
MaterialPlastic, Steel, Tempered Glass
CertificationsNone
Built-In LightingNo
Dimensions (W x H x D)8.62 x 16.18 x 16.18" / 219 x 411 x 411 mm
Warranty LengthLimited 1-Year Warranty
Packaging Info
Package Weight15 lb
Box Dimensions (LxWxH)19 x 19 x 11"

Cooler Master NR400 Reviews

It's great!

By Connor
Rated 5 out of 5
Date: 2021-10-31

Looks very nice and was easy to build in.

The Perfect Grampa Box

By Riley
Rated 5 out of 5
Date: 2021-06-07

This is my first build with a mini-tower, which I have avoided in the past because I thought there wouldn't be enough room inside. I was incorrect in that assumption. There is 'both hands inside' enough room! I also wanted to install an optical drive and this is one of the rare cases that gave me that option. It's quiet too, I need to look at the lighted power button to ensure its off when I do a shutdown. I like its looks and styling. I'm not into RGB LED so the glass panel wasn't necessary, but that's a minor negative. And, for what I got, the price as more that right. I'd buy it again in the future without giving it a second thought.

Great Case!  With one complaint..

By Mike
Rated 4 out of 5
Date: 2020-05-15

This would be a 5 star case if we could get it without the optical disk drive. Outside of that, I love this case. Was super easy to build in and looks great. The ODD only lets you get two 120 fans in the front. Without it, you could easily fit three. You can put the fans on the inside of the case and make it fit three, but aesthetically it looks terrible from the outside looking in and the top fan sits on an angle and you can only use two screws to secure it. Case has just enough room for a 240mm aio up top and a 120mm aio out the back. I would buy again for another build for sure despite the ODD. I would just use two 140mm fans up front instead possibly.. oh, yea.. plenty of room and tie down points in the back for cable management too. I am extremely happy with this case!

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YOUR RECENTLY VIEWED ITEMS

Will B&H have the non-ODD version of the NR400 ...

Will B&H have the non-ODD version of the NR400 case?
Asked by: Xavier
According to reviews online, Cooler Master won't release the non ODD version in the USA. Sorry for any inconvenience.
Answered by: jessica
Date published: 2020-01-17

Does this item come with the optical disk drive ...

Does this item come with the optical disk drive bay?
Asked by: Darrell
Yes, the Cooler Master MasterBox NR400 Mini Tower Case B&H # COMCBNR400KG has an optical drive bay as well as an optical drive door in the front of the case.
Answered by: Miguel
Date published: 2021-10-18
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