PC case GEMBIRD Fornax 400X Midi Tower Black — ATX, tempered glass, RGB fans, 4x 2.5 inch bays, 2x USB 3.0

The Gembird Fornax 400X is a black Midi Tower PC case designed for gaming builds. It features a tempered glass side panel, a special gaming-style front with mesh and filters, bottom-mounted power supply support and multiple fan mounts to assist airflow. Front I/O includes two USB 3.1 SuperSpeed Type-A ports and one USB 2.0 port. No power supply is included.

Advantages

The chassis comes with four ARGB fans (three 140 mm front, one 120 mm rear) for visual effects and improved cooling. A specially designed front filter and a magnetic top filter simplify maintenance by keeping dust out while allowing airflow. The tempered glass side panel provides a clear view of internal components. The case supports ATX motherboards and both 2.5" SSD and 3.5" HDD drives, offering versatile storage options.

Suitable for

• Gaming PC builds with ATX motherboards
• Systems requiring visible RGB/ARGB lighting
• Mid-size builds needing multiple drives (2.5" and 3.5")
• Users who prefer easy dust maintenance with magnetic/top filters

Key specifications

• Form factor: Midi Tower
• Dimensions (W x D x H): 200 x 390 x 449 mm
• Included fans: 3 × 140 mm front ARGB, 1 × 120 mm rear ARGB
• Drive bays: 2 × 3.5" bays, 4 × 2.5" bays
• Side panel: Tempered glass
• Front I/O: 2 × USB 3.1 Gen1 (Type-A), 1 × USB 2.0
• Supported motherboard: ATX
• Power supply: Bottom mount, not included
• Materials: Tempered glass, ABS, mesh, metal (SPCC)
• Colour: Black

How to use

Install the motherboard on the ATX standoffs, mount storage drives into the designated 3.5" or 2.5" bays, and install the power supply in the bottom compartment. Connect the included ARGB fans to the appropriate headers or controller and route cables for optimal airflow through the mesh front and top vents. Use the magnetic top filter and front filter for easy dust cleaning; remove them and clean as needed.

Recommendations

For best cooling and longevity, maintain clear airflow by keeping front and top filters clean, avoid obstructing front fan intakes, and use cable management to promote uninterrupted airflow. Verify ARGB connector compatibility with your motherboard or controller before connecting.