Compact size with max capacity
The ASUS Prime AP303 uses every square inch smartly, providing room for ATX PSUs up to 180 mm long and graphics cards up to 360 mm long. The case's graphics card bracket is built to support the heft of GeForce RTX 50 Series graphics cards measuring between 310 mm to 360 mm long—up to and including heavyweight cards like the ROG Astral GeForce RTX 5090. This ensures long-term hardware stability—even for graphics cards with large heatsinks for premium thermal performance. In addition, the Prime AP303 ensures stable power via a UL-certified internal power cable, which delivers 15 amps of current to the front-mounted power supply. For easy cable management, the AP303 also offers a 34 mm-wide compartment behind the motherboard.
