Cooler Master

Choose Your Style

The MasterBox Q300L is your straightforward option in the MasterBox Q-series from Cooler Master, a series that might be small in size but excels in functionality, modularity, and thermal performance.

Cooler Master

System Flexibility

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.

Cooler Master

Magnetic Dust Filters

Patterned magnetic filters create a unique look for your chassis while keeping your system's internals free from excess dust.

Cooler Master

Small Form Factor, ATX PSU Support

Despite the Micro-ATX form factor and the body depth/height of only 370 x 370mm, the MasterBox Q300L can accommodate a normal ATX PSU.

Cooler Master

Edge-to-Edge Acrylic Side Panel

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

Cooler Master

Thermal Performance

The open design of the perforated front, top, and bottom guarantees excellent thermal performance.

Cooler Master

Routing Space

A space 28mm-wide behind the motherboard tray offers open space for hidden cable management.

Learn more about Cooler Master MCB-Q300L-KANN-S00

Model
Brand
Cooler Master
Series
MasterBox Q300L
Model
MCB-Q300L-KANN-S00
Details
Type
Micro ATX Tower
Color
Black
Case Material
Steel / Plastic
With Power Supply
No
Power Supply Mounted
Bottom
Motherboard Compatibility
Micro-ATX / Mini-ITX
Side Panel Window
Yes
Dust Filters
Bottom
Expansion
Internal 3.5" Drive Bays
1
Internal 2.5" Drive Bays
2
Expansion Slots
4
Front Panel Ports
Front Ports
2 x USB 3.0 / Audio In & Out
Cooling System
Fan Options
Front - 2 x 120mm / 2 x 140mm fanRear: 1 x 120mm fan (Pre-installed)Top: 2 x 120mm fanBottom: 1 x 120mm fan
Radiator Options
Front - Up to 240mm / Rear - Up to 120mm
Dimensions & Weight
Max GPU Length
360 mm
Max CPU Cooler Height
157 mm
Max PSU Length
160 mm
Dimensions (H x W x D)
15.00" x 9.06" x 15.24"
Weight
8.16 lbs.
Additional Info
Features
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 Q300L can accommodate a normal ATX PSU.Patterned Dust Filter: Special pattern on the dust filter creates a unique outlook for the chassis.Clean Routing Space: Behind the motherboard tray, it offers 28mm wide and spacy room for hidden cable management.Excellent Thermal Performance: The open design of the perforated front, top and bottom guarantees excellent thermal performance.Edgo-to-Edge Acrylic Transparent Side Panel: Show off your build through the full size transparent side panel.Vertical and Horizontal position: The case can be put in vertical and horizontal position.
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