QUBE 340/ Q300L

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Powerfully Compact and Cool

QUBE 340/ Q300L

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.

POWERFUL COOLING CAPABILITY

High-airflow front panel and support for multiple fan and radiator keeps systems running cool and smooth.

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.

QUBE 340

Color<br>Black / White

Handles<br>Yes

Orientation<br>Horizontal / Vertical

I/O Panel Placement<br>Front Panel (Top/Bottom)

QUBE Ecosystem Support<br>Yes

Included Accessories<br>Filter (with Perforations), Headphone Holder

Q300L V3

Color<br>Black / White

Handles<br>No

Orientation<br>Horizontal / Vertical

I/O Panel Placement<br>Front Panel (Top/Bottom), Top Panel (front)

QUBE Ecosystem Support<br>No

Included Accessories<br>No

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