


The Antec CX300 ARGB White is a mid-tower ATX gaming case built around a panoramic 270° viewing design, vertical airflow layout and four pre-installed 120 mm ARGB fans. It supports ATX, Micro-ATX and Mini-ITX motherboards, graphics cards up to 420 mm, CPU coolers up to 170 mm and radiators up to 360 mm on the top. The official Antec documentation confirms the specifications below.
| Specification | Details |
|---|---|
| Brand | Antec |
| Model | CX300 ARGB White |
| Product Type | Mid-Tower Gaming Case |
| Color | White |
| EAN provided | 9872200994006 |
| Official UPC | 0-761345-10151-6 |
| Form Factor | Mid Tower |
| Case Material | Steel + Glass |
| Front Panel | 4 mm Tempered Glass |
| Side Panel | 4 mm Tempered Glass |
| Viewing Angle | Panoramic 270° |
| Motherboard Support | ATX / Micro-ATX / ITX |
| Expansion Slots | 7 |
| Cable Management Space | Up to 27 mm |
| Net Weight | 6.55 kg |
| Gross Weight | 8.06 kg |
The CX300 ARGB comes with 4 pre-installed 120 mm ARGB fans. Three are reverse-blade fans positioned on the side for intake, while one standard ARGB fan is installed at the rear for exhaust. The fans can be daisy-chained for ARGB synchronization.
Included fans:
Maximum fan installation: up to 10 × 120 mm
| Position | Fan Support |
|---|---|
| Top | 3 × 120 mm / 2 × 140 mm |
| Side | 3 × 120 mm |
| PSU Shroud | 2 × 120 mm |
| Bottom | 1 × 120 mm |
| Rear | 1 × 120 mm |
The vertical cooling design uses the mesh sections on the bottom and side to improve airflow through the chassis. Antec also provides EVA cushioning at the PSU mounting area to help reduce vibration.
| Position | Radiator Support |
|---|---|
| Top | 120 / 240 / 360 mm |
| Side | 120 / 240 mm |
A 360 mm radiator can be installed on the top, while the side supports radiators up to 240 mm. When installing a radiator at the top, Antec notes that motherboard/RAM clearance can become a consideration, with memory height limited to 45 mm in an interference scenario.
| Component | Maximum / Supported |
|---|---|
| Motherboard | ATX / Micro-ATX / ITX |
| Graphics Card Length | Up to 420 mm |
| CPU Cooler Height | Up to 170 mm |
| PSU Length | Up to 245 mm, including cable |
| Expansion Slots | 7 |
The 420 mm GPU clearance provides substantial room for large modern graphics cards, while the 170 mm CPU-cooler clearance accommodates many high-performance tower air coolers.
| Drive Type | Mounting Capacity |
|---|---|
| 2.5-inch | 2 |
| 3.5-inch / 2.5-inch Combination Mounts | 2 / 1 |
The front/top I/O section provides:
The LED Control button is provided for controlling the case’s integrated ARGB lighting setup.