Asus A21 Mid-Tower microATX Computer Case (White / Black) with High-Porosity Mesh Front Panel, 360mm Radiator Support, Extended 380mm GPU Clearance, Hidden-Connector Motherboard Compatibility & Tempered Glass Side Panel

The Asus A21 Mid-Tower microATX Case is a sleek, minimalist PC enclosure engineered for high-airflow PC builds without taking up unnecessary desk space. Available in clean White and classic Black finishes, it features a 40% porous mesh front panel for maximum intake airflow and a full-view tempered glass side panel to show off your components. Designed with modern hardware flexibility in mind, the A21 supports up to 360mm liquid cooling radiators on the top or front, graphics cards up to 380mm in length, and full-sized ATX power supplies up to 210mm. It also features 33mm of dedicated cable management space behind the motherboard tray with support for hidden-connector motherboards (BTF series), ensuring a clean, uncluttered internal build layout.

• High-Porosity Mesh Front Panel: Designed with a 40% open-area mesh structure that maximizes intake airflow and dust filtration for sustained thermal performance.
• Extensive Liquid Cooling Compatibility: Supports up to 360mm liquid cooling radiators mounted on the top or front panel, accommodating high-end CPU cooling demands.
• Broad Graphics Card Clearance: Generous internal chamber accommodates large 3-slot graphics cards up to 380mm in length, providing ample room for flag-ship GPUs.
• Hidden-Connector Motherboard Support: Compatible with next-gen back-connect (BTF) microATX and Mini-ITX motherboards to route power cables entirely behind the motherboard tray.
• 33mm Cable Management Space: Features an expansive 33mm compartment behind the motherboard tray with integrated routing channels for clean, effortless cable organization.
• Dual Color Aesthetics (White & Black): Color-matched internal chassis, cabling, and tempered glass borders across both White and Black color options.

Asus A21 Mid-Tower microATX Case: Compact Footprint, Uncompromised Airflow

The Asus A21 Mid-Tower microATX Case delivers a balance of compact desk footprint, optimal thermal dynamics, and versatile hardware support for modern PC builders.

Optimized Airflow & Liquid Cooling Versatility

Built with a high-porosity mesh front grille, the Asus A21 guarantees steady intake airflow to keep high-performance components cool under load. Its flexible fan and radiator layouts support up to five 120mm fans or top/front-mounted 360mm AIO liquid coolers, giving users total thermal control for gaming or content creation rigs.

Next-Gen BTF Support & Clean Cable Routing

Designed to accommodate traditional as well as back-connect (BTF) motherboards, the A21 simplifies cable routing. With a generous 33mm depth behind the main panel, power cables, SATA lines, and front I/O wiring nestle neatly out of sight, leaving the main tempered glass viewing chamber clean and uncluttered.

Technical Summary Table