Cooler Master Qube 340 M-ATX Mini-Tower Cabinet
- Mini-ITX / Micro-ATX Support
- High Airflow Cooling Design
- Optimum Clearance Design
- Adjustable I/O Panel
- Vertical & Horizontal Orientation
- QUBE Accessory Ecosystem Support
Built for Performance & Style
- The QUBE 340 / Q300L V3 is a compact Micro-ATX PC case designed for serious performance. Engineered with Cooler Master’s Thermal Excellence, it maximizes airflow to keep your system cool and stable - even with high-TDP components. Designed to accommodate longer GPUs and taller air coolers, it provides rigidity and efficient layouts with optimized airflow.
- Its modular design offers repositionable I/O panels, vertical or horizontal orientation, and support for accessories like handles and 3D-printable components. Ideal for DIY builders and system integrators, the QUBE 340 / Q300L V3 provides a smooth, straightforward building experience while allowing you to personalize both aesthetics and functionality.
PERFORMANCE IN PERFECT FIT
Provides generous components clearance to enable high-performance, compact builds.
ACCESS MADE EASY
Position the I/O panel on the top or bottom to keep connections within easy reach.
FLEXIBLE ORIENTATIONS
Whether vertical or horizontal, tailor builds to fit any space, setup, and workflow.
PERSONALIZE YOUR BUILD
The QUBE 340 includes handles, a headphone hook, and supports QUBE 3D-printable accessories for even more customization flexibility.