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Cooler Master MasterBox MB320L ARGB Mid Tower Gaming Case - Black USB 3.0

Cooler Master MasterBox MB320L ARGB Mid Tower Gaming Case - Black USB 3.0

CCL Code: CAS3949

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Cooler Master MasterBox MB320L ARGB Mid Tower Gaming Case - Black USB 3.0


Key Features:

  • PSU not included
  • 0 x 5.25" External Bay(s)
  • 2 x 2.5" Drive(s) Max
  • 2 x 3.5" Drive(s) Max
  • Max MB Size: Micro-ATX
  • Tempered Glass
CCL Code: CAS3949

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CoolerMaster MasterBox MB320L ARGB PC Case | MCB-B320L-KGNN-S02

The MasterBox MB320L ARGB is a Micro-ATX PC case with two pre-installed ARGB fans and honeycomb mesh ventilation on either side of the DarkMirror front panel. The DarkMirror front panel is smoked a shade darker to sharpen the contrast of the ARGB fans pre-installed behind it, highlighting its best features.

A high potential for both air-cooled and liquid-cooled builds comprise of front, top, and rear ventilation with the possibility to mount additional fans and radiators. Upholding the award-winning principles of the MB Series, versatility is paired with presentation to ensure that any gaming system built inside the MasterBox MB320L ARGB looks as good as it performs.

Main Features

  • DarkMirror Front Panel - The DarkMirror front panel shades light to add contrast to illuminated components.
  • 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, connected by the included splitter, to create a comprehensive ARGB lighting system.
  • 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.


Internal Expansion Bays 2 x 2.5"
2 x 2.5"/3.5"


USB Ports 2 x USB 3.0
Headphone Ports 1 x 3.5mm Jack
Microphone In Port 1 x 3.5mm Jack


Cooling System Front: Supports 3 x 120mm or 2 x 140mm fans (2 x 120mm ARGB fans included)
Top: Supports 2 x 120mm or 140mm fans
Rear: Supports 1 x 120mm fan
Power Supply ATX Power Supply supported


Form Factor Mid Tower Case
Case Colour Black
Material Mesh, Plastic, Tempered Glass
Motherboard Compatibility MicroATX
In The Box Case
Accessory Pack
Width 217.5 mm
Depth 435.5 mm
Height 410 mm
Weight 5.47 kg


Warranty 2 Years

Key Features

Firewire No
Main Colour Black
Expansion Slots 4
Case Type Tower
USB 3.0 Support Yes
Case Form Factor Mid Tower
Power Supply Included No
Optimised for Gaming
80Plus Rated No
PSU Form Factor ATX
Display Model in Showroom No
Illuminated No
Max 3.5" Drives 2
Max 2.5" Drives 2
Micro-ATX Yes
Cooler Height 166 mm
Built-in Card Reader No
USB Type-C Support No
Front HDMI No
Side Panel Type Tempered Glass
GPU Length 344 mm
PSU Depth 140 mm
Front Audio Type Separate
Number of Fans 2 fan(s)
LED Controller Included Yes
LED Strip(s) Included No
Maximum Motherboard Size Supported Micro-ATX
Total 2.5" + 3.5" drive bays 4
Power Requirement (auto) 6 W
USB3.0 ports 2
Low profile expansion No

Item Details

Manufacturer Cooler Master
Manufacturer Code MCB-B320L-KGNN-S02
EAN 4719512097304
Condition New

Warranty Information

Warranty 2 Years

Manufacturer Information

Manufacturer Cooler Master
Manufacturer Code MCB-B320L-KGNN-S02

Do you have you a question about the Cooler Master MasterBox MB320L ARGB Mid Tower microATX Case in Black with Tempered Glass, 2x ARGB Fans, ARGB Controller?

Q: does this support the B550 AORAS ELITE mother board
Post Answer
Q: Are all of the mother board stand offs pre-installed for a micro atx board?
Post Answer
Q: Does the controller actually have lighting modes on it or is it just a splitter
Answer by Website User on 7th October 2020
The controller does have lighting modes available if you don't have an ARGB header on your motherboard. -MR
0 customers found this answer helpful.
Post Answer
Q: is the included rgb controller 5v 3pin and how do you control it
Answer by Website User on 6th October 2020
The included controller connects via 5V 3-pin and acts like a hub for the fans so they can all be controlled by the motherboard software with just one cable. -MR
0 customers found this answer helpful.
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Q: Are the fans 4-pin 3-pin or molex?
Answer by Website User on 22nd June 2020
They will be 4-pin PWM. -MR
0 customers found this answer helpful.
Post Answer
4.0 / 5 1 review


December 2020

Very good case, easy to build, only problem in common with most cases for atxm motherboards is the argb lighting, trying to find an atxm motherboard with an argb header is like looking for hens teeth!

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