MasterBox Q300P

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.


Choose Your Style
MasterBox Q300P

RGB Lighting

Use the RGB lighting to create a captivating build in your preferred color theme with the included RGB controller.

Choose your View
Choose your Color

Easy To Handle

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

Modular I/O Panel

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.

Multiple Positioning Options

The case can be put in vertical and horizontal position.

Edge-To-Edge Side Panel

Show off your build through the full size transparent side panel.

Clean Routing Space

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

Model number MCB-Q300P-KANN-S02
Available Color(s) Black
Materials SECC, Plastic
Dimensions (WxHxD) 230(W) x 450(H) x 450(D) mm
Weight 5.2kg
M/B Type microATX, Mini-ITX
5.25" Drive Bays 0
3.5" Drive Bays 1
2.5" Drive Bays 2
I/O Panel 2x USB 3.0
1x Audio In & Out
Expansion Slots 4
Air Cooling Compatibility Top:
2x 120mm
2x 120/140mm
1x 120mm
1x 120mm
Water Cooling Compatibility Front:
120/240mm radiator
120mm radiator
Included Fans Front:
2x 120mm RGB LED fan
1x 120mm
Dust Filters Bottom
Power Supply Type Bottom Mount
Max. 160mm
Standard ATX PS2 / EPS 12V
Maximum CPU Cooler Height 157mm
Maximum GPU/PCI Card Length 360mm
Warranty 2 years
EAN Code 4719512065518
UPC Code 884102038037