Asus A31 PLUS Mid Tower ATX Chassis

Build the setup you’ve always imagined with the ASUS A31 PLUS Mid Tower, a case designed to match your ambition. Whether you're upgrading or starting from scratch, this chassis gives you the performance headroom, visual impact, and build flexibility to bring your desktop gaming rig to life.

You’ll enjoy wide motherboard support, including ATX, Micro-ATX, Mini-ITX, and BTF compatibility, giving you the freedom to build with future-ready components. The ASUS A31 PLUS Mid Tower doesn’t just house your hardware – it showcases it. With 4mm tempered glass panels on both the front and left sides, your RGB lighting, clean cable runs, and premium components are always on full display.

Out of the box, you get four pre-installed ARGB 120mm fans – three mounted on the side and one at the rear – delivering strong airflow and stunning lighting without the need for additional upgrades. Cooling flexibility is extensive, with support for up to three 12mm or two 140mm fans on the top, and space for a 140mm or 120mm fan at the rear. Radiator support includes 360mm, 280mm, 240mm, 140mm, and 120mm options on the top, plus a 120mm radiator at the rear.

Internally, there’s space to support high-performance components, including graphics cards up to 380mm in length, CPU air coolers up to 165mm in height, and power supplies up to 200mm long. Two combo drive bays accommodate either 2.5" SSDs or 3.5" HDDs, giving you storage flexibility without sacrificing space. Seven expansion slots ensure full upgrade capability, whether you're adding capture cards, GPUs or high-speed networking.

The front I/O is built for speed and convenience, featuring one USB 3.2 Gen 2x2 Type-C port, two USB 3.2 Gen1 ports, and a 3.5 mm combined headphone/microphone jack. With 34mm of cable management space and removable dust filters at the top and bottom, you’ll find it easy to keep things clean and efficient over the long run.

Measuring 23.8 x 51.1 x 43.5cm and weighing 9100g, the ASUS A31 PLUS Mid Tower strikes the perfect balance between size, durability and airflow — giving you a solid foundation to build a high-performance gaming PC you can be proud of.