Mini MasterBox NR400 – Midnight Black

A compact black micro‑ATX tower with tempered glass side panel, two pre‑installed 120 mm fans, flexible airflow, ample cable routing, four expansion slots, dual USB 3.0 and a headphone/mic combo for gaming rigs.

Brand: Cooler Master
Model: MCB-NR400-KGNN-S00
MPN: MCB-NR400-KGNN-S00
SKU: MCB-NR400-KGNN-S00
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Audio input Yes
Audio output Yes
Cable management Yes
Cable Routing Space 22mm Behind Motherboard Tray mm
Case Edition MasterBox NR400 (without ODD)
Case form factor MicroATX
Chassis Contruction Materials Steel / Plastic
Colours Black
Depth 411 mm
Dimensions 210 x 411 x 411 (WxHxD mm)
Drive bays 4 x 2.5" Internal 3 x 3.5" Internal
Dust Filters Bottom Top
Fan Bays 1 x 120mm 5 x 120mm / 4x 140mm
Fans Included 2 x 120mm
Form Factor Mini Tower
Front Radiator Compatibility 1 x 120/140/240/280mm
LED Lighting No
Max CPU Cooler Height 166 mm
Max GPU Card Length 346 mm
Max PSU Length 140/325 mm
Motherboard form factor MicroATX Mini-ITX
Number of 3.5" Bays 3
Number of expansion slots 4
On/off button Yes
Package depth 480 mm
Package width 278 mm
Panel I/O 1 x Headphone/Mic Combo 2 x USB 3.0
Power supply included No
Power supply location Bottom
PSU Included No
PSU Mounting Location Bottom Mount, Rear
PSU Support ATX
Rear fans installed 1x 120 mm
Reset button Yes
Side window Yes
Suitable for Gaming
Supported HDD sizes 2.5,3.5"
Type PC
Weight 5.56 kg (Approx)
Width 210 mm
Window Configuration 1 x Main Side
Window Construction Tempered Glass
Windows Yes