Cooler Master MasterBox MB320L ARGB Micro-ATX Case
The MasterBox MB320L ARGB combines a DarkMirror front panel with honeycomb side ventilation and two supplied 120 mm ARGB fans. The compact frame supports Micro-ATX and Mini-ITX motherboards, with a glass side panel to display the installed hardware.
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Overview
COOLER MASTER MASTERBOX MB320L ARGB

Cooler Master MasterBox MB320L ARGB
Cooler Master MasterBox MB320L ARGB: The MasterBox MB320L ARGB combines a DarkMirror front panel with honeycomb side ventilation and two supplied 120 mm ARGB fans. The compact frame supports Micro-ATX and Mini-ITX motherboards, with a glass side panel to display the installed hardware. Available from AX Store in Kuwait.
Front intake
Motherboard format
GPU length clearance
CPU-cooler clearance

The Case Design
The DarkMirror front uses a darker translucent finish to contrast with the illuminated fans, with honeycomb mesh ventilation along its sides. A tempered-glass side panel reveals the motherboard and graphics card. The compact body measures 435.5 L × 217.5 W × 410 H mm.
Supplied Cooling and Lighting
Two 120 mm ARGB fans are supplied at the front, with the listed splitter providing the supported lighting connections. This S01 model requires the appropriate compatible lighting-control arrangement; the separately documented S02 controller package should not be assumed. Connect fan power and addressable lighting to their corresponding interfaces.
Radiator and Fan Mounting
The front supports a 240 mm or 280 mm radiator and the top supports a 240 mm radiator, with a 120 mm option at the rear. Top fan positions accept two 120 mm or two 140 mm fans. Check radiator thickness and motherboard clearance before combining the front and top assemblies.
Component Clearance
Micro-ATX and Mini-ITX motherboards fit the four-slot case layout. GPU length clearance is 344 mm and CPU-cooler height clearance is 166 mm. PSU space depends strongly on the lower drive-cage position, so choose the power supply together with the required drives, front cooling hardware and cable room.
Access, Storage and Routing
Two 3.5-inch and two 2.5-inch drive positions provide the storage arrangement. With the HDD cage in its backmost position, PSU clearance is 140 mm; removing the cage and front radiator permits up to 325 mm. Rear routing space is 18–22 mm for organising the motherboard, storage and front-panel leads.

Manufacturer model
MCB-B320L-KGNN-S01
Dimensions
435.5 L × 217.5 W × 410 H mm
Included fans
2 × 120 mm ARGB front fans
Connections and Control
Two front USB-A 3.2 Gen 1 connections and separate microphone and headphone connections serve peripherals. Dust filtering at the front, top and bottom provides cleaning access. Route the internal front-panel and fan leads before fitting the last panels, keeping the honeycomb intake and rotating fans clear.
Plan the Component Clearances
Check motherboard format, graphics-card length, cooler height and radiator positions together. Allow space for the power supply and cable routing before selecting the rest of the build. Compare related options such as Cooler Master MasterBox TD500 Mesh V2 ARGB ATX Mid Tower Case - White or XIGMATEK Aquarius Plus Mid Tower Case, keeping the exact model and configuration in the decision. For the wider setup, explore Corsair iCUE ML120 RGB ELITE 120mm Fan, Triple Pack and check the connection, size or mounting requirements before pairing accessories. Browse the Cooler Master range at AX for more choices.
Cooler Master MasterBox MB320L ARGB Setup Choices
Check motherboard format, graphics-card length, cooler height and radiator positions together. Allow space for the power supply and cable routing before selecting the rest of the build. Explore Corsair RMe Series RM750e Fully Modular Low-Noise Power Supply, Corsair iCUE SP120 RGB ELITE Performance 120mm Triple Fan Pack.
Frequently Asked Questions
Which motherboard formats fit?
Micro-ATX / Mini-ITX.
Which fans are supplied?
2 × 120 mm ARGB front fans.
Which fan is supplied?
2 × 120 mm ARGB front fans.
What graphics-card length is supported?
344 mm.
What CPU-cooler height is supported?
166 mm.
Which radiator positions are supported?
Front: 240 / 280 mm; top: 240 mm; rear: 120 mm.
Which front connections are available?
2 × USB-A 3.2 Gen 1; microphone; headphone.
Build Your Setup with AX Store
Explore computers, displays and accessories for your workspace at AX Store. For help choosing the right model or checking an accessory, contact AX Store.
THE DETAILS
Technical specifications
Case Hardware
Cooler Master MasterBox MB320L ARGB
Mini Tower
Micro-ATX / Mini-ITX
MCB-B320L-KGNN-S01
435.5 L × 217.5 W × 410 H mm
2 × 120 mm ARGB front fans
344 mm
166 mm
140 mm with HDD cage in backmost position
Up to 325 mm
Front: 240 / 280 mm; top: 240 mm; rear: 120 mm
2 × 3.5-inch; 2 × 2.5-inch
4
2 × USB-A 3.2 Gen 1; microphone; headphone
ARGB splitter; standalone S02 controller not promised for S01
COMPLETE YOUR SETUP