ASUS Prime AP303 ATX Mid-Tower PC Case – Mesh White

Product Overview

The ASUS Prime AP303 Mesh White is a compact yet highly capable ATX mid-tower chassis built for performance-focused gaming systems, creator desktops, and modern workstation builds. Designed to maximize internal capacity within a sleek 44-liter footprint, it combines excellent airflow, premium hardware compatibility, reinforced GPU support, and clean cable management in a refined modern design.

Compact Frame with Maximum Capacity

The Prime AP303 is engineered to deliver exceptional space efficiency without compromising support for modern high-performance components.

Hardware compatibility includes:
• Graphics cards up to 360mm long
• Radiators up to 360mm with 60mm maximum thickness
• ATX power supplies up to 180mm long
• High-performance air cooling compatibility

Its efficient layout makes it ideal for compact enthusiast-grade builds.

Structural GPU Support for Heavy Graphics Cards

Modern flagship GPUs demand strong structural support, and the AP303 delivers with its integrated GPU stabilization system.

Features include:
• Dedicated graphics card holder
• Reinforced GPU support bracket
• Secure screw-mounted support system
• Reduced GPU sag and movement

Supports large graphics cards including modern RTX-class GPUs between 310mm and 360mm.

Optimized Cooling Architecture

Built for thermal efficiency, the AP303 supports aggressive cooling configurations for demanding systems.

Cooling support includes:

Top Fan Support:
• 3 × 120mm
• 3 × 140mm

Rear Fan Support:
• 1 × 120mm

Pre-installed:
• 1 × 120mm rear fan

With support for up to seven total fans, airflow remains strong even under sustained workloads.

Advanced Liquid Cooling Compatibility

The Prime AP303 is designed for serious cooling performance with support for large radiator configurations.

Radiator support includes:
• Up to 360mm radiators
• Support for 60mm thick radiator + fan combinations

Perfect for modern high-performance AIO liquid cooling systems.

Quasi-Filter Mesh Airflow Design

The metallic quasi-filter mesh panel design enhances cooling while helping reduce dust ingress.

Benefits include:
• Improved front airflow intake
• Better thermal performance
• Reduced dust accumulation
• Clean premium industrial aesthetics

A practical design built for long-term performance.

Stable Power Delivery for High-End Systems

The Prime AP303 includes a UL-certified internal power cable capable of delivering 15 amps of current, ensuring reliable power delivery for demanding builds.

Suitable for systems using high-end hardware and power supplies up to 1200W.

Modern Front I/O Connectivity

Convenient front panel connectivity includes:
• 1 × USB 3.2 Gen 2×2 Type-C (20Gbps)
• 2 × USB 3.0 Type-A
• Audio connectivity support

Fast, flexible access for modern peripherals and storage devices.

Unified Front I/O Header Design

ASUS simplifies the building process with a unified front I/O header layout that makes motherboard connection cleaner and easier.

Ideal for DIY builders seeking a faster assembly experience.

Organized Cable Management

Despite its compact size, the AP303 includes a generous 34mm rear cable routing compartment for clean internal organization.

Benefits include:
• Better airflow
• Easier cable routing
• Cleaner visual presentation
• Simpler maintenance and upgrades

Tool-Free Side Panel Access

The side panels use a secure clip-based mechanism that allows fast removal without tools.

This improves accessibility for upgrades, cleaning, and maintenance.

Motherboard Compatibility

Supports mainstream motherboard form factors including:
• ATX
• Micro-ATX
• Mini-ITX

Flexible enough for gaming, workstation, and creator systems.

Premium White Finish

The clean white aesthetic gives the Prime AP303 a modern premium appearance that complements contemporary gaming setups and professional workstation environments.

Ideal For

Perfect for gaming PCs, creator workstations, compact ATX performance systems, liquid-cooled desktops, and high-airflow modern white builds.

Box Contents

Included in the package:
• ASUS Prime AP303 Mesh White Case
• GPU support bracket
• Graphics card holder
• Pre-installed rear fan
• Installation accessories
• User documentation