ASUS today announced the Prime AP303, a 44-litre mid-tower ATX case designed to provide users with ample space for high-end components, along with multiple side panel and colour options. The case’s user-friendly features and cooling optimisations deliver a compact frame with exceptional potential.
Compact size with maximum capacity
The ASUS Prime AP303 makes smart use of every inch, accommodating ATX PSUs up to 180mm in length and graphics cards up to 360mm long. The graphics card bracket is engineered to support the weight of GeForce RTX 50 Series cards measuring between 310mm and 360mm — including substantial models such as the ROG Astral GeForce RTX 5090. This design ensures long-term hardware stability, even for graphics cards with large heatsinks that deliver premium thermal performance. Additionally, the ASUS Prime AP303 provides reliable power through a UL-certified internal power cable that supplies up to 15 amps to the front-mounted PSU. For improved cable management, it also features a 34mm-wide compartment behind the motherboard tray.
Capable, compact cooling
In addition to supporting large PSUs and graphics cards, the ASUS Prime AP303 can accommodate a radiator up to 360mm long and 60mm thick — making it easy to connect CPU power cables at the top edge of the motherboard. With seven fan mounting points, the chassis is well-equipped to maintain optimal temperatures for high-performance systems.
The Prime AP303 chassis also incorporates a quasi-filter metallic mesh throughout its design. This square mesh enhances airflow, ensuring internal components receive a steady supply of cool air. Every version of the ASUS Prime AP303 features mesh elements, so regardless of configuration, users can expect robust cooling performance.
Tool-free side panels, classic colour options
Users can choose between tempered glass or quasi-filtered metallic mesh side panels. The tempered glass option offers a clear view of internal components — ideal for RGB enthusiasts who enjoy showcasing their illuminated builds. Alternatively, the metallic mesh panel maintains a subtle aesthetic while maximising airflow. Both side-panel options feature a tool-free mechanism, allowing for quick and easy removal or installation.
The ASUS Prime AP303 is offered in black or white, with colour-matched interior cabling for a cohesive finish. Whether building a stealthy black setup to complement other electronics or a pristine Moonlight White battlestation, the AP303 adapts effortlessly to different styles.
Comprehensive front-panel connectivity
The AP303 includes a USB 20Gbps Type-C port on the front panel for convenient access, particularly when the chassis is positioned on a desk. When paired with a compatible motherboard, users can enjoy ultra-fast data transfer speeds. The case also provides two front-panel USB Type-A ports, along with headphone and microphone jacks — ensuring quick and easy device swapping for everyday use.
Learn more about the ASUS Prime AP303 Mid-Tower Chassis.
