- Robust structural exoskeleton featuring 12 extruded aluminum pillars, 8 die-cast connectors, and anti-drop hover glass panels
- Patented rear-chamber air guide hood actively cooling motherboard VRMs and memory via dual dedicated 120mm fans
- Spacious interior supporting 427mm graphics cards, 176mm CPU coolers, and back-connect motherboards
- Versatile cooling layout accommodating up to 13 fan mounts and top 360mm radiators with 95mm push-pull clearance
- Top 280mm radiators or dual 140mm fans conflict with and require removing the patented VRM air guide hood
- Perforated top and bottom high-airflow mesh ventilation panels lack slide-out or magnetic dust filters
- Utilizing a back-connect motherboard reduces 3.5-inch hard drive storage capacity from two drives to one
Overview
Showcase dual-chamber enclosures rarely prioritize targeted motherboard airflow over aesthetic transparency, but Jonsbo tackles that compromise directly by encasing the X400 Pro in a rigid structural exoskeleton. Rather than relying solely on folded sheet metal, the chassis unites twelve extruded aluminum pillars and eight die-cast corner connectors with a 2H hardness metallic finish, anchoring dual panoramic tempered glass panels in a high-rigidity frame. Inside, the dual-chamber layout separates the power supply and cabling behind the motherboard tray, leaving an open main compartment with ample clearance for graphics cards up to 16.8 inches (427 mm) long and CPU air coolers up to 6.9 inches (176 mm) tall.
Chassis cooling is built around thirteen total fan mounts and an innovative motherboard airflow path. A dedicated air guide hood draws cool air from the rear chamber using two 120 mm fans and directs it across voltage regulators and memory modules, actively cooling zones that are frequently starved of direct airflow in liquid-cooled builds. Builders can mount a 360 mm radiator along the side or top, with the top bracket providing 3.7 inches (95 mm) of clearance to accommodate thick push-pull radiator setups. However, utilizing a 280 mm radiator or dual 140 mm fans on the top mount physically obstructs the air guide hood, requiring its complete removal. In addition, the high-airflow perforated mesh panels on the top and bottom lack magnetic or slide-out dust filters, meaning maintenance relies on manual panel wiping to manage dust accumulation.
Everyday system building and routine hardware swaps benefit from thoughtful assembly conveniences. Side and top panels utilize tool-free quick-release latches paired with an anti-drop hover wing structure that keeps tempered glass panels suspended during disassembly rather than crashing down. Cutouts along the motherboard tray provide seamless routing for back-connect motherboards such as ASUS BTF and MSI Project Zero, complemented by dual modular rear covers that conceal cable bundles. Choosing a back-connect motherboard does restrict secondary drive clearance, reducing 3.5-inch hard drive capacity from two drives down to one. Weighing 24.9 pounds (11.3 kg) unpopulated, the chassis is an immovable desk anchor, but its reinforced framework and integrated anti-sag bracket provide an exceptionally stable showcase platform.
Technical Specifications
| Brand | JONSBO |
| Model | X400 Pro |
| Chassis Structure | Dual-chamber ATX mid-tower with panoramic dual tempered glass panels |
| Materials | 12 extruded aluminum pillars, 8 die-cast connectors (2H metallic coating), SPCC and SGCC steel internal frame, tempered glass |
| Dimensions (D X W X H) | 18.1 x 12.2 x 18.8 in (460.7 x 310.9 x 476.8 mm) |
| Net Weight | 24.9 lbs (11.3 kg) |
| Gross Weight | 28.9 lbs (13.1 kg) |
| Motherboard Support | ATX, Micro-ATX, Mini-ITX (Back-connect ASUS BTF & MSI Project Zero compatible) |
| Expansion Slots | 7 |
| Drive Bays | 1 x 2.5-inch SSD + up to 2 x 3.5-inch HDD (reduced to 1 x 3.5-inch with back-connect motherboards) |
| Front I/O Ports | 1 x USB 3.2 Gen 2 Type-C, 2 x USB 3.2 Gen 1 Type-A, 1 x 3.5mm Headphone/Microphone Audio combo jack, Power button, Reset button |
| Total Fan Mounts | 13 |
| Fan Mount Breakdown | Top: 3 x 120mm / 2 x 140mm; Side: 3 x 120mm; Bottom: 3 x 120mm; Rear: 2 x 120mm; Air Guide Hood: 2 x 120mm |
| Radiator Support | Top: Up to 360mm / 280mm / 240mm; Side: Up to 360mm |
| Maximum GPU Length | 16.8 in (427 mm) |
| CPU Cooler Height Clearance | 6.9 in (176 mm) |
| PSU Length Clearance | 7.1 in (180 mm) |
| Top Radiator Clearance | 3.7 in (95 mm push-pull clearance) |
| Panel Access Mechanism | Tool-free quick-release side panels and top cover with safety latch locks and anti-drop hover wing structure |
| Integrated Accessories | Adjustable height GPU support bracket with anti-scratch rubber padding |
Primary Sources & Audited Citations
- JONSBO X400 PRO Gray - Official Technical Specifications & Product Overview
- JONSBO X400 PRO White - Official Technical Specifications & Product Overview
- Chiphell In-Depth Teardown: JONSBO X400 PRO Aluminum Skeleton Frame Analysis
- JONSBO X400 Series Official User Manual & Structural Installation Guide
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At a Glance
How reliable is the JONSBO X400 Pro according to Mizex audits?
Recommended for showcase PC builders utilizing standard 360 mm radiators and back-connect motherboards, provided you operate in a low-dust setting and do not require more than one 3.5-inch hard drive.
What are the known quirks or drawbacks of the JONSBO X400 Pro?
Our reliability audit identified the following documented caveats:
- Top 280mm radiators or dual 140mm fans conflict with and require removing the patented VRM air guide hood
- Perforated top and bottom high-airflow mesh ventilation panels lack slide-out or magnetic dust filters
- Utilizing a back-connect motherboard reduces 3.5-inch hard drive storage capacity from two drives to one
What are the key engineering highlights of the JONSBO X400 Pro?
The top strengths recorded in our evaluation include:
- Robust structural exoskeleton featuring 12 extruded aluminum pillars, 8 die-cast connectors, and anti-drop hover glass panels
- Patented rear-chamber air guide hood actively cooling motherboard VRMs and memory via dual dedicated 120mm fans
- Spacious interior supporting 427mm graphics cards, 176mm CPU coolers, and back-connect motherboards
- Versatile cooling layout accommodating up to 13 fan mounts and top 360mm radiators with 95mm push-pull clearance