B4-mATX 21.3L Compact PC Case - Black with Wood Finish, Supports 358mm GPU & 360mm AIO

Product Overview

The B4-mATX 21.3L PC Case is a premium, compact computer chassis featuring a sophisticated black aesthetic with elegant wood-look exterior detailing. Engineered for builders who demand a small-footprint desktop without sacrificing performance, this case offers a surprising 21.3-liter internal capacity. It is specifically designed to accommodate high-end components, including graphics cards up to 358 mm in length and full-sized 360 mm all-in-one liquid-cooling radiators. Including two specialized slim fans, this case is the perfect foundation for those planning a high-performance, space-saving custom build.

Before you begin your next project, carefully review the listed dimensions and cooling compatibility. Because this is a compact form factor case, compatibility often depends on your specific motherboard choice, radiator thickness, fan selection, power supply unit, and your overall cable management strategy. We recommend dry-fitting your selected components against the case’s internal clearances and designated mounting points to ensure a seamless assembly process.

Key Features

• Compact 21.3L Form Factor: This small-volume case is precision-engineered for a space-conscious setup. It helps keep your desktop build physically contained and visually organized while still offering the high-end component clearance typically reserved for much larger mid-tower cases.
• Large GPU Clearance: The B4-mATX supports graphics cards up to 358 mm long. Please verify the total length of your chosen GPU, ensuring you account for additional space required by power connectors and complex cable routing paths to avoid interference.
• High-Performance 360 mm AIO Support: Despite its compact footprint, this chassis provides robust support for 360 mm all-in-one liquid cooling systems. Ensure your radiator and fan thickness are compatible with your internal layout to optimize your thermal performance.
• Optimized Airflow with Slim Fans: Included with the chassis are two slim fans, designed to maximize airflow within tight spaces. These fans help maintain system stability and keep temperatures low during intensive computing tasks.
• Premium Black Wood Aesthetic: Featuring a unique "Black Wood Wood Black" finish, this case provides a modern, warm aesthetic that blends high-tech performance with natural-looking design elements.
• Versatile Build Planning: The generous GPU and radiator clearance provided in this compact shell makes it easier for enthusiasts to plan advanced cooling and graphical hardware setups. Always verify measurements and mounting requirements before starting your build.

Technical Specifications

• Product Type: High-performance PC Case / Computer Chassis
• Category: Duduks (Retained from original specifications)
• Case Capacity: 21.3 Liters
• Maximum GPU Length: 358 mm
• Radiator Compatibility: Supports up to 360 mm AIO liquid cooling
• Included Cooling: Two slim cooling fans included
• Exterior Finish: Black Wood Wood Black
• UPC Code: 840353054738
• Build Notes: Designed for advanced users; requires component clearance verification

What’s in the Box

• One B4-mATX 21.3L PC Case with black wood-look finish panels.
• Two slim case fans pre-included for thermal optimization.
• Essential mounting hardware for core components.