The Qube 540 redefines DIY PC building with its beginner-friendly flat-pack design and fully customizable interior. This compact ATX case removes the limits of traditional layouts, giving you the freedom to create your ideal internal setup. It also supports 3D-printed external accessories, allowing you to personalize both the look and functionality of your build. Flexible Orientation Design Engineered to work seamlessly in both horizontal and vertical positions, with a reversible I/O panel and movable handles that let you customize layout, improve accessibility, and reposition the case effortlessly. GPU Compatibility Offers up to 415 mm GPU clearance w/o the front fan for full-size graphic cards, including RTX 5090 and RX 9070 XT. Motherboard Compatibility Supports ITX, ATX, and large E-ATX motherboards (up to 11" wide), all within a compact ATX form factor for maximum build flexibility. Mesh-Optimized Airflow Full front mesh panel maximizes ventilation for superior cooling under load, paired with a pre-installed SickleFlow 120mm fan for improved airflow. USB Type-C & Full I/O Connectivity The I/O panel includes 2 USB 3.2 Gen1 ports and a USB 3.2 Gen2 Type-C port, giving you fast and convenient front-access connectivity. Modular & Fully Customizable Design Repositionable parts and flexible mounts let you create your ideal internal layout, while support for 3D-printed accessories allows you to personalize the exterior for a truly unique build.