Cooler Master Masterbox Mb311L Argb (Black) Cabinet (Mcb-B311L-Kgnn-S02)


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Model No : MCB-B311L-KGNN-S02

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product description


Cooler Master MasterBox MB311L ARGB (Black) Cabinet (MCB-B311L-KGNN-S02)

Series Masterbox
Type Mini Tower
5.25″ Bays NA
3.5″ Bays 2
2.5″ Bays 2
Expansion Slots 4
Max Radiator Support 280
Max Fan Support 6
Color Black
Side Panel Transparent

The MasterBox MB311L ARGB is a Micro-ATX airflow PC case pre-installed with two ARGB fans and made to be built with the latest gaming hardware.


The MasterBox MB311L ARGB is a Micro-ATX airflow PC case pre-installed with two ARGB fans and made to be built with the latest gaming hardware.  The front panel’s façade is made entirely of Fine Mesh, placed between two honeycomb vents on either side to maximize airflow. Since running the latest games, smoothly, means keeping the latest hardware efficiently cooled, top panel ventilation offers the option to add even more cooling hardware—if nothing is mounted, the top panel acts as passive ventilation.

The internal layout was engineered for a high compatibility for the latest gaming hardware while also accounting for future upgrades. Following in the principles of the award-winning MB Series, versatility is paired with presentation to ensure that any gaming system built inside the MasterBox MB311L ARGB looks as good as it performs.


Cooler Master’s Fine Mesh design on the front panel is proven to provide proficient airflow while filtering out dust.


Large, mesh intakes span each side of the front panel to provide additional airflow to system.


Two pre-installed 120mm ARGB fans can be managed by the motherboard, and connected by the included splitter, to create a comprehensive ARGB lighting system.


Airflow is optimized by a collaboration between the Fine Mesh front panel, additional mesh intakes, top panel ventilation, and rear exhaust.


Hardware, custom-loop cooling, and the pure pride of the builder is shown in panoramic view through an edge-to-edge tempered glass side panel.


The drive cage is able to shift toward the front to accommodate for PSU space, backwards to provide additional radiator space, or even completely removed.


​The small ARGB Controller is a mini-sized controller that allows your Addressable RGB such as fans and LED strips to be powered and controlled even in PC systems without an A-RGB capable motherboard.​

The controller comes with 14 lighting presets to make full use of the Addressable LEDs in the system and also allows to be completely switched off by long pressing its button.​

It is also possible to attach any external 2pin button to it to be able to switch presets without having to open the system. For ease of use, Cooler Master allows the RESET button to be optionally connected to the controller and used as an external ARGB preset switch button.


Product Name MasterBox MB311L ARGB
Model Number MCB-B311L-KGNN-S02
Available Color Black
Materials Outlook Steel,Mesh, Plastic
Body Steel
Side Panel Tempered Glass
Dimensions (LxWxH) 435.5 x 217.5 x 410mm, 366.5 x 210 x 400mm
Weight 5.45
Motherboard Support Micro ATX, Mini ITX
Expansion Slots 4
Drive Bays 5.25″ N/A
2.5″/3.5″ HDD 2
2.5″ SSD 2
I/O Port 2x USB 3.2 Gen 1 (formerly USB 3.0), 1x 3.5mm Audio Jack, 1x 3.5mm Mic Jack, 1x ARGB 2-to-3 splitter, 1x ARGB Controller (only for the S02 versions)
Pre-installed Fans Front 2x 120mm ARGB Fan
Rear N/A
Fan Support Top 2x 120/140mm
Front 3x 120mm, 2x 140mm
Rear 1x 120mm
Liquid Cooling Support Top 120mm, 240mm
Front 120mm, 140mm, 240mm, 280mm
Rear 120mm
Clearances CPU Cooler 166mm/6.54″
GPU 344mm
PSU 140mm (HDD cage in backmost position), 325mm (w/o front radiator & HDD cage)
Power Supply Support Bottom Mount,


Lighting Support ARGB Control Board x 1
Warranty 2 Years
Note ***Features, Price and specifications are subject to change without notice.

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