ASUS PRIME A21 mATX Gaming Case Black – Micro‑ATX Mesh Airflow Chassis

Efficient Cooling with ASUS PRIME A21 mATX Gaming Case

The ASUS PRIME A21 mATX Gaming Case delivers reliable performance and strong airflow for mainstream gaming rigs and productivity builds. The focus keyphrase ASUS PRIME A21 mATX Gaming Case reflects this case’s ability to support Micro‑ATX and Mini‑ITX motherboards while offering solid cooling potential. Its front panel mesh is 40 % porous, balancing airflow and dust filtering for components that stay cooler under load.

Spacious Compatibility and Build‑Ready Design

Despite its compact Micro‑ATX form factor, the A21 supports large components including up to 380 mm graphics cards and radiators up to 360 mm. CPU coolers up to 165 mm in height and power supplies up to 210 mm in length also fit comfortably. This makes the case suitable for both powerful gaming cards and mainstream productivity systems.

Clean Cable Management and Practical Layout

The A21 includes a 33 mm wide cable management compartment behind the motherboard tray. This space helps keep cables tidy and improves overall airflow. The front I/O panel provides two USB 3.2 Gen1 ports and combined headphone/microphone jacks.

Ideal Choice for Micro‑ATX Builds

The ASUS PRIME A21 is designed for DIY builders who want a balance of airflow, compatibility, and clean aesthetics. Its minimalist black design and practical build layout make it a smart choice for custom mid‑range gaming rigs or efficient productivity setups.

SPECIFICATIONS 

• Model: ASUS PRIME A21 mATX Gaming Case
• Case Type: Micro‑ATX Mid‑Tower Gaming Chassis
• Color: Black ([turn0search1])
• Motherboard Support: Micro‑ATX, Mini‑ITX
• Materials: Steel, Mesh Front Panel, Tempered Glass Side Panel (windowed variants)
• Expansion Slots: 5
• Drive Bays: 1× 2.5″, 2× 2.5″/3.5″ Combo
• I/O Ports: 2× USB 3.2 Gen1, 1× Headphone, 1× Microphone
• Radiator Support: Front/Top up to 360 mm, Rear 120 mm
• Fan Support: Front up to 3× 120 mm / 2× 140 mm, Top up to 3× 120 mm / 2× 140 mm, Rear 1× 120 mm
• Max GPU Length: 380 mm
• Max CPU Cooler Height: 165 mm
• Max PSU Length: 210 mm
• Cable Management: 33 mm Behind Motherboard Tray
• Dimensions: ~220 × 430 × 465 mm
• Weight: ~7.3 kg
• PSU: Not Included