PC case Lian Li A3-mATX Micro Tower White

The LIAN LI & DAN Cases A3-mATX is a compact mesh micro-ATX case designed to house large components while keeping a minimal chassis footprint. It features a relocatable PSU bracket for flexible internal layouts and a Wood Edition front panel with black walnut trim for a refined appearance. The case balances small form factor usability with support for high-performance parts, offering modular panels and easy access for installation and maintenance.

Advantages

The A3-mATX provides well-ventilated mesh panels on three sides and a sleek front for effective airflow and a minimalist look. Tool-less removable exterior panels and modular brackets simplify assembly and cable routing. Multiple PSU mounting positions and an included ATX offset bracket allow longer GPU configurations, and an anti-sag GPU bracket is supplied to maintain card alignment. The Wood Edition’s open-front design improves PSU intake when installed front-facing.

Key specifications

• Form factor: 26.3 L micro form factor chassis (M-ATX / ITX compatible)
• Motherboard support: micro-ATX, Mini-ITX
• Maximum GPU length: 415 mm (up to 4-slot thick; with 25 mm bottom fan installed GPU thickness limited to 61 mm / 3-slot)
• Maximum CPU cooler height: 165 mm
• Radiator support: up to 360 mm AIO (note: radiator + fan may conflict with GPU placement)
• Fan support: up to 10 × 120 mm fans
• PSU compatibility: ATX / SFX / SFX-L / LIAN LI Edge, up to 220 mm; multiple mounting slots including front and sideways positions
• Storage: 2 × 2.5" SSD (removable tray), 1 × 2.5" or 1 × 3.5" bottom drive bay
• Exterior: steel mesh side and top panels; Wood Edition front panel with black walnut trim
• Included accessories: anti-sag GPU bracket, ATX PSU offset bracket
• Optional accessories: vertical GPU kit (supports up to 3-slot GPU with 150 mm PCIe 4.0 riser), left-side tempered glass panel

How to use

Install the chosen motherboard (micro-ATX or ITX) and position the PSU using the relocatable bracket to optimize GPU clearance. Mount storage drives using the removable SSD tray or the bottom drive mounting point depending on required capacity. For cooling, install up to a 360 mm AIO where space permits and place case fans in mesh panel locations to ensure positive airflow. Use the tool-less removable panels and modular brackets to access interior areas for cable routing and component installation. If installing a long or thick GPU, consider PSU offset positions or the ATX offset bracket to create the necessary clearance and fit the anti-sag bracket to maintain alignment.

Recommendations

For a balanced build, verify GPU thickness and radiator/fan combinations before final assembly: if a 25 mm bottom fan is used, the GPU thickness allowance reduces to 61 mm (3-slot). When planning a high-end cooling setup, check that radiator and fan placement will not conflict with GPU installation. Use the anti-sag bracket and available PSU mounting options to secure long GPUs and optimize airflow.