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Cooler Master Q300P MasterBox

The MasterBoxQ300P is your portable option in the lineup of the brand new MasterBoxQ-series from Cooler Master. A series that might be small in size but excels in functionality and modularity without compromising on the thermal performance.Four removable handles and the DarkMirrorfront and top panels makes the chassis easy to transport and stands out from the rest. Although the size wouldn’t tell, the MasterBoxQ300P supports a standard ATX PSU which we don’t see often in the market with this size. Due to the cube design of the frame you can turn and rotate this chassis in multiple positions. The I/O panel can be adjusted to six different locations, three options at each side of the case. Two RGB fans are pre-installed in the front of the case. You can decide which setup and color theme fits you best.The combination of the portable design and the unique exchangeable outlook makes the MasterBoxQ300P the perfect choice for gamers and creative builders.
Availability: In stock
Manufacturer: Cooler Master
Old price: R1759,00
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High Flexibility for System Building: The I/O panel can be adjusted to six different locations. On both side of the body you can install the I/O panel at the front, top or bottom.

Minimized Dimension with ATX PSU Support: Despite the Micro-ATX form factor and the body depth and height of only 370mm x 370mm, the MasterBox Q300P can accommodate a normal ATX PSU.

Easy to Handle: Four removable handles make it easy to transport or carry your full system build to a LAN Party.

Clean Routing Space: Behind the motherboard tray, it offers 28mm wide and spacy room for hidden cable management.

Edge-to-Edge Acrylic Transparent Side Panel: Show off your build through the full size transparent side panel.

RGB LED fans: Two pre-installed 120mm RGB LED fans behind the front panel and RGB lighting at the top front can create an amazing lighting effect.

RGB Lighting Control: One RGB controller is included in the accessory pack. If your MB does not support the RGB control function, you can connect the RESET button cable and control the RGB lighting directly from the I/O panel.

Vertical and Horizontal position: The case can be put in vertical and horizontal position.

1 to 3 Splitter Cable for RGB LED Fans: The RGB Connector Splitter and 4 pin male to male adapters are included.

Certified compatible with: ASUS, Gigabyte, MSI and ASRock motherboards.

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: Mini-Tower
  • LED indicators: Y
  • Type: PC
  • Material: Plastic,Steel
  • Supported motherboard form factors: Micro ATX,Mini-ITX
  • Number of 3.5" bays: 1
  • Side window: Y
  • Number of 2.5" bays: 2
  • Number of expansion slots: 4
  • Maximum CPU cooler height: 157
  • Maximum graphics card length: 360
  • Maximum PSU length: 160
  • Cable management: Y
  • Illumination: Y
  • Illumination colour: Red/Green/Blue
  • Illumination location: Case fans
  • Anti-dust filter: Y

Weight & dimensions:

  • Width: 230
  • Weight: 5200
  • Depth: 450
  • Height: 450

Packaging data:

  • Package width: 277
  • Package depth 510
  • Package height: 527
  • Package weight: 6400


  • Supported HDD sizes: 2.5,3.5


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

Power supply:

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