Gaming On Wide-Open Throttle

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 looks as good as it performs.

Fine mesh front panel

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

Mesh intakes

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

Dual argb fans

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.

Optimized airflow

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

Tempered glass side panel

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.

Adaptable drive cage

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.

Versatile cooling options

Support for up to six fans and front, top, and rear radiator support ensure that performance is not compromised.

Room for upgrades

Support for up to a 344mm graphics card, a 166mm CPU cooler, and up to a 325mm PSU in length provides room for upgrades to stay ahead of the game.

Product Name

MasterBox MB311L ARGB

MasterBox MB311L ARGB w/ controller

Product Number

MCB-B311L-KGNN-S01

MCB-B311L-KGNN-S02

Exterior Color

Black

Materials

Body

Steel, Mesh, Plastic

Windowed Side Panel

Tempered Glass

Dimensions

(L x W x H)

incl. Protrusions

435.5 x 217.5 x 410mm

Volume (Liters incl. Protrusions)

38.84L

Motherboard Support

Mini-ITX, Micro-ATX

Expansion Slots

4

Drive Bays

5.25“ ODD

N/A

3.5” / 2.5” Combo

2

2.5” SSD

2

I/O Panel

USB Ports

2 x USB 3.2 Gen 1 (USB 3.0)

Audio In / Out

1 x 3.5mm Audio Jack

1 x 3.5mm Mic Jack

Other

1 x ARGB 2-to-3 Splitter

1 x ARGB Controller

1 x ARGB 2-to-3 Splitter

Pre-installed Fan(s)

Top

N/A

Front

2 x 120mm ARGB fans

Rear

N/A

Bottom

N/A

Fan Support

Top

2 x 120mm / 2 x 140mm

Front

3 x 120mm* / 2 x 140mm

(*can only mount behind the front plate)

Rear

1 x 120mm

Radiator Support

Top

120 / 240mm

Front

120 / 140 / 240 / 280mm

Rear

120mm

Clearances

CPU Cooler

166mm

Power Supply

325mm (w/o front radiator & drive cage)

140mm (drive cage in backmost position)

Graphics Card

344mm

Cable Routing

Behind MB Tray

18~22mm

Dust Filters

Front, Top, Bottom

Power Supply Support

Bottom Mount, ATX

Warranty

2 Years