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Cooler Master Q500L MasterBox

The MasterBox Q500L supports a standard ATX motherboard and PSU in a highly compact layout. With the same exterior dimensions as the MasterBox Q300L, support for a standard ATX motherboard was made possible by maximizing the usage of internal space.Although the PSU is mounted by default at the top/front of the chassis, the mounting bracket allows for the repositioning of the PSU depending on form factor. For instance, if a mini ITX motherboard is used instead of an ATX in the MasterBox Q500L, the PSU can be mounted in the conventional position of the bottom, rear to allow for increased front panel ventilation and configuration options.Across the Q series, the movable I/O panel and support for different orientations are also featured on the MasterBox Q500L. Thermal performance is dependent on the build itself, with the exterior fully perforated to offer plenty of options for cooling configurations.
Availability: In stock
Manufacturer: Cooler Master
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Minimized Dimensions for Standard ATX: TheMasterBox Q500L supports standard ATX motherboards and PSUs, with a body depth and height of only 386 x 381mm.

Fully Perforated Chassis: The top, front, rear, and bottom panels are fully perforated to offer airflow for various fan configurations.

Movable I/O Panel: Orientation for the chassis is versatile, with the option to move the I/O Panel to 6 different locations.

Vertical and Horizontal Position: The case can be oriented vertically or horizontally while retaining easy access to the I/O. Rubberized screws also function as feet to supplement different orientations.

Vertical PSU Placement: The PSU is positioned on the front of the chassis to fully utilize internal space. The bracket can be relocated to offer position options depending on preference and form factor.

Magnetic Dust Filters: The magnetic dust filters feature a unique design. Magnets allow quick removal and installation for easy cleaning of the dust filters.

Clean Routing Space: Behind the motherboard tray, 27~30mm width of space is offered for cable management.

Edge-to-Edge Transparent Side Panel: The side panel displays system builds in full view.

Ports & interfaces:

  • USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity: 2
  • Audio input: Y
  • Audio output: Y


  • Product colour: Black
  • Form factor: Midi-Tower
  • Type: PC
  • Material: Acrylic,Plastic,Steel
  • Supported motherboard form factors: ATX,Micro ATX,Mini-ITX
  • Number of 3.5" bays: 1
  • Side window: Y
  • Number of 2.5" bays: 2
  • Number of expansion slots: 7
  • Reset button: Y
  • Maximum CPU cooler height: 160
  • Maximum graphics card length: 360
  • Maximum PSU length: 180
  • Cable management: Y
  • Anti-dust filter: Y
  • On/off button: Y

Weight & dimensions:

  • Width: 230
  • Weight: 3830
  • Depth: 386
  • Height: 381

Packaging data:

  • Package width: 276
  • Package depth: 435
  • Package height: 461
  • Package weight: 4830


  • Supported HDD sizes: 2.5,3.5
  • HDD/SSD combo cage: Y


  • Rear fans installed: 1x 120 mm
  • Number of rear fans supported (max): 1
  • Rear fans diameters supported: 120
  • Number of top fans supported (max): 2
  • Top fans diameters supported: 120,140
  • Number of bottom fans supported (max): 2
  • Bottom fans diameters supported: 120
  • Liquid cooling capability: Y
  • Front radiator fan sizes supported: 120,240
  • Rear radiator fan sizes supported: 120

Power supply:

  • Power supply included: N
  • Power supply location: Top
  • Supported power supply form factors: ATX,PS2
Attribute nameAttribute value
Form FactorMidi Tower