ASUS Prime AP303 Mesh Panel ATX Mid-Tower PC Case
ASUS
ASUS Prime AP303 Mesh Panel ATX Mid-Tower PC Case
The ASUS Prime AP303 Mesh Panel ATX Mid-Tower PC Case is a compact 44-litre chassis aimed at builders who want full ATX flexibility without a large footprint. It accommodates graphics cards up to 360 mm long, radiators up to 360 mm, and ATX power supplies up to 180 mm, making it a practical choice for high-performance builds where desk or rack space is limited. A UL-certified internal power cable, dedicated GPU bracket, and mesh panels designed to reduce dust while improving airflow round out the core appeal.
Why this product
44-litre body, full ATX component support
Despite its compact 215 × 425 × 485 mm footprint, it fits Mini-ITX, Micro-ATX and ATX motherboards alongside graphics cards up to 360 mm long and ATX PSUs up to 180 mm long.
360 mm radiator support up top
The top panel accepts radiators up to 360 mm long and up to 60 mm thick, giving water-cooling builders real flexibility without requiring a larger chassis.
GPU bracket reduces sagging
An included bracket and holder supports graphics cards from 310 mm to 360 mm long, keeping them firmly seated and reducing sag over time.
UL-certified 15 A internal power cable
The internal power cable carries a UL certification and delivers 15 amperes, helping maintain stable power delivery for demanding builds paired with a 1200 W power supply.
20 Gbps USB Type-C on the front panel
A USB 3.2 Gen 2×2 Type-C port on the front I/O delivers up to 20 Gbps alongside two USB 3.2 Gen 1 Type-A ports, covering both current and older peripherals.
Mesh panels and up to seven-fan support
Metallic quasi-filter mesh panels enhance airflow and limit dust ingress, while the chassis supports up to seven fans in total across top and rear positions.
- Form FactorATX Mid-Tower
- Volume44 litres
- Dimensions (W × H × D)215 × 425 × 485 mm
- Max GPU Length360 mm
- Max Radiator Size (Top)360 mm (up to 60 mm thick)
- Max CPU Cooler Height165 mm
- Front USB Type-C1 × USB 3.2 Gen 2×2 (20 Gbps)
- Pre-installed Fans1 × 120 mm (rear)
- SKUASU-2552
- EAN4711636165051
- Fits ATX, Micro-ATX and Mini-ITX motherboards.
- Accepts graphics cards up to 360 mm long; the included bracket supports cards from 310 mm to 360 mm.
- Supports ATX power supplies up to 180 mm long.
- Compatible with 360 mm, 280 mm, 240 mm, 140 mm and 120 mm radiators in the top position, and a 120 mm radiator at the rear.
- Top radiator support is rated up to 60 mm thick — oversized or dual-thickness radiators may not fit.
- CPU coolers up to 165 mm tall are supported; tower coolers taller than this will not fit.
Best for
- High-performance air or water-cooled builds where a 360 mm radiator or up to seven fans are needed but case footprint must stay compact.
- Builders using long, heavy GPUs — the dedicated bracket directly addresses sagging on cards between 310 mm and 360 mm.
- Desk or small-space setups that still need full ATX motherboard and PSU compatibility within a 44-litre enclosure.
- Users who value front-panel connectivity, including a 20 Gbps USB Type-C port alongside standard USB 3.0 ports.
- Builders who prioritise cable management — the 34 mm compartment behind the motherboard tray provides dedicated routing space.
Trade-offs
- E-ATX or XL-ATX builds — the case supports ATX as its largest form factor and will not accommodate extended or larger motherboard sizes.
- Builds requiring PSUs longer than 180 mm — longer units will not physically fit within the chassis.
- Builds using CPU tower coolers over 165 mm tall — clearance is capped at that height.
- Builders wanting pre-installed front fans — only one 120 mm rear fan comes pre-installed; front fans must be added separately.
The ASUS Prime AP303 is a compact 44-liter ATX chassis that accommodates 360mm radiators up to 60mm thick and graphics cards up to 360mm long. It features a graphics card bracket and holder to keep cards firmly mounted, plus an internal power cable that delivers 15 amperes to maintain stable power delivery for high-end PC builds.
The AP303 is designed to maximize internal space, enabling installation of graphics cards up to 360mm long, radiators up to 360mm long and ATX power supplies up to 180mm long.
With support for up to 360mm radiators and up to seven fans, the AP303 is primed to deal with the thermal scenarios of high-performance hardware. Metallic quasi-filter mesh panels are designed to enhance airflow and minimize dust ingress, delivering both performance and protection in a sleek style.
The UL-certified internal power cable delivers 15 amperes of current to ensure stable operation for high-end systems with a 1200W power supply.
AP303 includes one 20Gbps Type-C port and two USB 3.0 ports for future-ready and backward-compatible connectivity. A thoughtful header design makes connecting Front Input/Output (FIO) components to the motherboard easy.
A 34mm-wide compartment behind the motherboard provides ample space to neatly organize cables, despite the relatively compact dimensions of the chassis.
The side panels of the AP303 use a simple but secure clip mechanism to attach to the case.
The AP303 is available in either black or white, giving you options to create a rig that blends in or stands out. In addition, the tempered glass side panel version provides an elegant appearance, whereas the mesh side panel version boosts airflow efficiency and thermal performance.
General
| Brand | ASUS |
|---|---|
| Model | Prime AP303 Mesh Panel |
| Case Type | ATX Mid-Tower |
| Volume | 44 litres |
| Dimensions (W × H × D) | 215 × 425 × 485 mm |
| Weight (Mesh Edition) | 6.8 kg |
| Weight (Tempered Glass Edition) | 7.8 kg |
| Colour Options | Black, White |
Motherboard & Expansion
| Motherboard Support | Mini-ITX, Micro-ATX, ATX |
|---|---|
| Expansion Slots | 7 |
| Max GPU Length | 360 mm |
| GPU Bracket Support Range | 310 mm – 360 mm |
| Max PSU Length | 180 mm |
Cooling & Airflow
| Max CPU Cooler Height | 165 mm |
|---|---|
| Radiator Support (Top) | 360 mm, 280 mm, 240 mm, 140 mm, 120 mm (max 60 mm thick) |
| Radiator Support (Rear) | 120 mm |
| Fan Support (Top) | 3 × 140 mm or 3 × 120 mm |
| Fan Support (Rear) | 1 × 120 mm |
| Pre-installed Fans | 1 × 120 mm (rear) |
| Dust Filters | Removable (bottom) |
Connectivity & Storage
| Front USB Type-C | 1 × USB 3.2 Gen 2×2 Type-C (20 Gbps) |
|---|---|
| Front USB Type-A | 2 × USB 3.2 Gen 1 |
| Front Audio | 1 × Headphone / Microphone combo |
| Drive Bays | 1 × 2.5"/3.5" combo bay, 2 × 2.5" bay |
| Cable Management Space | 34 mm (behind motherboard tray) |
| Internal Power Cable | UL-certified, 15 A |
Shipping
All our products are shipped from the United Kingdom within 24 to 48 hours of purchase. See our Shipping and Returns page for full details.
Returns
- Tech Syndicate offers a full money-back guarantee on all purchases made in our store. If you are not satisfied with your purchase, we will provide a full refund, no questions asked.
- Refunds are available within 45 days of delivery.
- After the 45-day period you are no longer eligible for a refund, so we encourage you to try the product within the first few weeks to make sure it fits your needs.