Geometric Future M4 Caliburn Mid-Tower Case – Black | GEO-M4-CAL

The Geometric Future M4 Caliburn is a premium mid-tower chassis engineered for builders who want a compact footprint without compromising airflow, hardware compatibility, or aesthetics. Featuring the brand’s signature vertical air-tunnel design, thick steel construction, and a full tempered-glass panel, the M4 Caliburn blends modern styling with serious performance capabilities.

Designed for both gaming enthusiasts and professional PC builders, this 35-liter case offers exceptional flexibility with support for E-ATX motherboards, long GPUs, powerful air coolers, and advanced liquid-cooling configurations—all while maintaining a clean, efficient internal layout.

 Key Features

Vertical Air-Tunnel Cooling Architecture

The innovative bottom-to-top airflow path maximizes cooling efficiency by directing fresh air through your system with minimal obstruction. Mesh ventilation on three sides provides filtered, high-volume intake for superior thermal performance.

 Premium Build Quality

• 1.0 mm steel structure + 1.2 mm L-shaped reinforcement

• Rigid, durable construction built for long-term performance

• Tempered-glass side panel for a clean, panoramic view of your build

The Caliburn stands out with high-quality materials and precision craftsmanship ideal for modern enthusiast builds.

 Flexible Hardware Compatibility

Despite its compact footprint, the M4 Caliburn supports:

• Motherboards: E-ATX (up to 11" × 12"), ATX, Micro-ATX, Mini-ITX

• GPU Length: Up to 400 mm (supports vertical GPU mounting)

• CPU Cooler Height: Up to 164 mm

• PSU Length: Up to 220 mm

Perfect for flagship GPUs, high-end coolers, and modular power supplies.

 Advanced Cooling Support

The case is optimized for high-airflow builds and advanced liquid cooling:

Fan Support

• Bottom Intake: 3 × 120 mm (recommended for main airflow)

• Rear / Top: Additional fan support depending on configuration

• Total: Up to 5 × 120 mm fans

Radiator Support

• Bottom: 360 mm radiator

• Top: 240 mm radiator

Whether air-cooled or water-cooled, the M4 Caliburn is ready for performance systems.

 Storage Options

• 4 × 2.5″ SSDs

• or 2 × 3.5″ HDDs

Tool-free options and ample mounting locations keep your build organized.

 Modern Connectivity

Top I/O panel includes:

• USB 3.0

• USB Type-C

• USB 2.0

• HD Audio

Quick, convenient access for gaming peripherals and high-speed storage devices.

 Cable Management & Usability

• 31 mm cable management space behind the motherboard tray

• Tool-less tempered-glass panel

• Vertical GPU support included

• Mesh footstand acts as a 360° dust filter, improving airflow while maintaining cleanliness

Designed for easy building, clean layouts, and maximum performance.

 Specifications Summary

• Model: M4 Caliburn

• Case Type: Mid Tower

• Material: 1.0–1.2 mm steel + tempered glass

• Cooling Method: Air / Liquid

• Color: Black

• Motherboard Support: E-ATX / ATX / m-ATX / Mini-ITX

• Max GPU Length: 400 mm

• Max CPU Cooler Height: 164 mm

• PSU Support: Up to 220 mm

• Storage: 4 × 2.5″ or 2 × 3.5″

• Fan Support: Up to 5 × 120 mm

• Radiator Support: 360 mm (bottom), 240 mm (top)