Montech AIR 903 Base, E-ATX Mid Tower Case, High Airflow with Max Capacity, 3X 140mm PWM Fans Pre-Installed, Tempered Glass Side Panel, Mesh Front, Type-C, Support 4090 GPUs, White

The Montech AIR 903 Base is a high-performance E-ATX mid-tower case designed for builders who demand exceptional airflow, modern design, and expansive hardware compatibility. Its clean and industrial aesthetic is highlighted by a full metal mesh front panel with a 51% open area ventilation rate, ensuring massive air intake to keep high-end components cool even under heavy loads.

Out of the box, the AIR 903 Base comes equipped with three high-airflow HP140 PWM fans—two at the front and one at the rear—delivering powerful, quiet cooling performance. The chassis supports up to nine fans total, as well as 360mm radiators on both the front and top, making it an ideal choice for custom water-cooling loops or large AIO setups. Air coolers up to 180mm and GPUs up to 400mm are supported, easily accommodating flagship graphics cards like the RTX 4090.

Internally, the spacious layout fits E-ATX, ATX, Micro-ATX, and Mini-ITX motherboards, with tool-free drive support for 2× 3.5” HDDs and 5× 2.5” SSDs. A large PSU shroud hides cabling and storage, while a generous 27mm cable routing space, rubber grommets, and pre-installed Velcro straps ensure clean and professional cable management.

User-friendly features include magnetic top and bottom dust filters, a hinged tempered glass side panel, and quick-release front panel for easy maintenance. The top-mounted I/O panel includes USB 3.0 ports, a USB Type-C, audio jacks, and reset/LED controls.

Designed for builders who want premium airflow and expandability without the bulk of a full-tower, the Montech AIR 903 Base delivers a sleek, high-performance chassis that meets the needs of gamers, creators, and enthusiasts alike