ASUS Prime AP303 ATX Mid Tower Cabinet ( Black )

The ASUS Prime AP303 is a compact ATX mid-tower chassis engineered for builders who need full-sized performance within a restrained 44-litre footprint. Measuring 215 mm wide × 425 mm tall × 485 mm deep, the AP303 punches well above its size by accommodating graphics cards up to 360 mm long, ATX power supplies up to 180 mm long, and CPU coolers up to 165 mm tall — a spec sheet that covers virtually every current-generation component. Cooling flexibility is a defining strength of this case. The top panel supports radiators from 120 mm through 360 mm (maximum 60 mm radiator thickness), while the rear accommodates a 120 mm radiator. Fan positions allow up to three 120 mm or three 140 mm fans on top, plus one 120 mm at the rear, giving builders a seven-fan ceiling. One 120 mm fan comes pre-installed at the rear (configuration may vary by model). For builders pairing the AP303 with large RTX 50-series cards (310–360 mm), a dedicated graphics card bracket attaches via screws to firmly reduce sagging and lateral movement. Combined with the enclosed graphics card holder, this dual-support system keeps heavy, multi-fan GPUs stable under sustained workloads. Front-panel connectivity is future-ready: the I/O panel includes one USB 3.2 Gen 2×2 Type-C port rated at 20 Gbps, two USB 3.2 Gen 1 Type-A ports, and a combined headphone/microphone jack. Inside, a unified FIO header simplifies motherboard connections, and a 34 mm cable-management channel behind the motherboard tray keeps wiring tidy despite the chassis's compact proportions. The AP303 is also shipped with a UL-certified internal power cable rated to deliver 15 amperes — supporting stable operation in high-end builds using power supplies up to 1,200 W. Metallic quasi-filter mesh panels line key airflow zones, working to improve intake efficiency while reducing dust ingress. Tool-free side panels use a clip mechanism for easy interior access, and a removable dust filter is positioned at the bottom. Motherboard compatibility spans ATX, Micro-ATX, and Mini-ITX form factors across 7 expansion slots, with drive bay options including two 2.5-inch bays and one 2.5/3.5-inch combo bay. The AP303 is available in black or white, with either a tempered glass or mesh side-panel variant. — Verified Specifications — Form Factor: ATX Mid Tower | Volume: 44 litres | Dimensions (W×H×D): 215 × 425 × 485 mm | Motherboard Support: ATX, Micro-ATX, Mini-ITX | Expansion Slots: 7 | Max GPU Length: 360 mm | Max PSU Length: 180 mm | Max CPU Cooler Height: 165 mm | Radiator Support (Top): up to 360 mm (60 mm max thickness) | Radiator Support (Rear): 120 mm | Fan Support (Top): 3 × 120 mm or 3 × 140 mm | Fan Support (Rear): 1 × 120 mm | Pre-installed Fan: 1 × 120 mm rear (varies by model) | Front I/O: 1 × USB 3.2 Gen 2×2 Type-C (20 Gbps), 2 × USB 3.2 Gen 1, 1 × audio combo | Drive Bays: 2 × 2.5", 1 × 2.5"/3.5" combo | Cable Management Space: 34 mm | Dust Filter: Bottom (removable) | Weight: Mesh Edition 6.8 kg / Tempered Glass Edition 7.8 kg | Colour: Black