Cooler Master
Cooler Master MasterBox Q300L Micro-ATX Starter Kit
The Cooler Master MasterBox Q300L Micro-ATX Tower is a versatile PC case designed for builders seeking flexibility and style. It features a unique magnetic dust filter and a transparent acrylic side panel to showcase your components. The adjustable I/O panel can be positioned in six different locations for optimal convenience. Despite its compact Micro-ATX form factor, it supports a standard ATX power supply. The case offers ample clean routing space for tidy cable management and ensures excellent thermal performance with its open, perforated design. It can be positioned both vertically and horizontally, offering great setup flexibility.
$89.99
More MasterBox Q300L Options
Owner Satisfaction
4.5
/ 5
Category Rank
283
/ 898
#283 in Desktop Computer Cases
Price vs Category Average
-86%
Below average
Case Form Factor
Small Form Factor
/ Small Form Factor
Who it's for
- Exceptional Budget Value
- High Versatility and Compact Size
- Excellent Magnetic Dust Filters
Who should skip it
- Restrictive Airflow Design
- Scratch-Prone Acrylic Side Panel
- Tight Cable Management Space
Key Specs
Case Form Factor
Small Form Factor
Motherboard Compatibility
Micro ATX / Mini ITX
Case Material
Steel / Plastic
PSU Form Factor
ATX
Maximum GPU Length
360 mm
Maximum CPU Cooler Height
157 mm
2.5" Drive Bays
2
3.5" Drive Bays
1
Features
- Adjustable I/O panel for flexible placement.
- Supports ATX PSU in a compact Micro-ATX chassis.
- Unique patterned magnetic dust filter.
- Edge-to-edge transparent acrylic side panel.
- Ample space for clean cable management.
- Excellent thermal performance with open design.
- Vertical and horizontal orientation options.
What customers say
This Micro ATX case earns high praise primarily for its exceptional value and flexible design. Builders consistently note that it delivers a clean aesthetic and useful features well above its affordable price point. A key highlight is the modularity, allowing users to reposition the I/O panel for versatile orientations, a rare feature in this segment. Maintenance is simplified by effective magnetic dust filters. While the acrylic panel scratches easily, most users accept this trade-off. Cable management requires patience in the compact space, but airflow is adequate, though extra fans are suggested for powerful builds. Overall, it is highly recommended as a satisfying, budget-friendly enclosure perfect for first time builders.
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$90