Masterbox MB311L
Gear Up, Cool Off

Fine Mesh Front Panel
Mesh Intakes
Optimized Airflow
Tempered Glass Side Panel
Adaptable Drive Cage
Versatile Cooling Options
Room For Upgrades

For Power-hungry Matx Builds
The MasterBox MB311L is a Micro-ATX airflow PC case made to be built with the latest gaming hardware and ready for future upgrades. 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
Mesh ventilation and upgrade capabilities ensure the latest performance gaming systems can be efficiently cooled.
Mesh Intakes
Large, mesh intakes span each side of the front panel to provide additional airflow to 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 (re)movable, 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 a total of six 120mm fans and front, top and rear radiator placement ensures that you don't have to compromise on performance.

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
Product Number MCB-B311L-KGNN-S00
Exterior Color Black
Materials - Body Steel, Mesh, Plastic
Materials - Windowed Side Panel Tempered Glass
Dimensions (LxWxH) - incl. Protrusions 435.5 x 217.5 x 410mm
Dimensions (LxWxH) - excl. Protrusions 366.5 x 210 x 400mm
Volume (Liters excl. Protrusions) 30.79L
Motherboard Support Mini-ITX, Micro-ATX
Expansion Slots 4
5.25" Drive Bays (ODD) N/A
3.5"/2.5" Drive Bays (Combo) 2
2.5" Drive Bays (SSD) 2
I/O Panel - USB Ports 2 x USB 3.2 Gen 1 (USB 3.0)
I/O Panel - Audio In / Out 1x 3.5mm Audio Jack
1x 3.5mm Mic Jack
I/O Panel - Other Reset Switch
Pre-installed Fan(s) - Top N/A
Pre-installed Fan(s) - Front N/A
Pre-installed Fan(s) - Rear 1 x 120mm
Pre-installed Fan(s) - Bottom N/A
Fan Support - Top 2 x 120mm / 2 x 140mm
Fan Support - Front 3 x 120mm* / 2 x 140mm
(*can only mount behind the front plate)
Fan Support - Rear 1 x 120mm
Radiator Support - Top 120 / 240mm
Radiator Support - Front 120 / 140 / 240 / 280mm
Radiator Support - Rear 120mm
Clearances - CPU Cooler 166mm
Clearances - Power Supply 325mm (w/o front radiator & drive cage)
140mm (drive cage in backmost position)
Clearances - Graphics Card 344mm
Cable Routing - Behind MB Tray 18~22mm
Dust Filters Front, Top, Bottom
Power Supply Support Bottom Mount, ATX
Warranty 2 years
EAN Code 4719512097274
UPC Code 884102069574