- Seamless 270-degree pillarless curved tempered glass delivers an unobstructed panoramic showcase view.
- Extensive liquid cooling capability accommodating up to three simultaneous 360mm radiators across top, side, and bottom mounts.
- Comprehensive mainboard tray layout engineered for standard and reverse-connector ATX, Micro-ATX, and Mini-ITX boards.
- Generous interior clearances accommodating graphics cards up to 17.1 in (435 mm) and CPU coolers up to 6.8 in (173 mm).
- Heavy chassis weight at 27.8 lbs (12.6 kg) unpopulated makes transport and desk repositioning demanding.
- 2.5-inch solid-state drive mounting trays share physical locations with two of the 3.5-inch hard drive bays.
Overview
Eliminating the traditional structural corner pillar allows showcase PC chassis to provide an uninterrupted view of internal components, and curved panoramic glass elevates this concept by smoothing the transition between front and side viewing angles. Built around a thick CNC-machined aluminum alloy frame, the chassis integrates a 270-degree curved tempered glass panel that slides open via a dedicated release mechanism. Internally, the tray accommodates standard ATX, Micro-ATX, and Mini-ITX motherboards while introducing pass-through channels specifically engineered for modern back-connect or reverse-plug motherboard designs. Tool-free snap latches on the top, front, and bottom exterior panels streamline system maintenance, allowing builders to access key mounting brackets without reaching for a screwdriver.
High-power hardware configurations demand substantial thermal dissipation, particularly when solid glass panels enclose the front intake perimeter. Cooling architecture addresses this challenge by shifting airflow vectors into bottom, side, top, and rear pathways, accommodating up to ten individual cooling fans. Dedicated mounting rails provide simultaneous clearance for up to three 360 mm radiators positioned across the top, side, and bottom compartments. Physical interior tolerances are generous, offering 17.1 in (435 mm) of clearance for full-length graphics cards, 6.8 in (173 mm) of vertical headroom for tall dual-tower air coolers, and support for standard ATX power supplies measuring up to 7.9 in (200 mm) in length.
Handling and assembly reveal the practical compromises inherent to heavy-gauge aluminum and oversized curved glass. Weighing 27.8 lbs (12.6 kg) unpopulated and 36.2 lbs (16.4 kg) in retail packaging, the enclosure requires careful desk placement and deliberate two-handed maneuvering during installation. Storage flexibility balances up to four 3.5-inch hard drive bays against two 2.5-inch solid-state drive locations, though the 2.5-inch trays share mounting points with two of the larger drive positions. Front-panel connectivity keeps daily peripherals accessible via a high-speed USB 3.2 Gen 2 Type-C port, two USB 3.2 Gen 1 Type-A interfaces, and discrete audio and microphone jacks, rounding out a robust foundation for elaborate custom water-cooling loops or clean reverse-connector builds.
Technical Specifications
| Brand | JONSBO |
| Model | BO400CG V2 |
| Chassis Form Factor | Mid-Tower Showcase |
| Dimensions | 18.7 x 12.2 x 19.3 in (474 x 311 x 489 mm) |
| Net Weight | 27.8 lbs (12.6 kg) |
| Gross Weight | 36.2 lbs (16.4 kg) |
| Materials | Aluminum alloy frame, CNC precision machined components, curved tempered glass |
| Side Panel Design | 270-degree pillarless curved tempered glass |
| Motherboard Support | Mini-ITX, Micro-ATX, ATX (supports back-connect / reverse-plug motherboards) |
| Expansion Slots | 8 |
| Drive Bays | Up to 4x 3.5-inch HDD, up to 2x 2.5-inch SSD (shared with 3.5-inch drive positions) |
| Maximum GPU Clearance | 17.1 in (435 mm) |
| Maximum CPU Cooler Height | 6.8 in (173 mm) |
| Maximum PSU Length | 7.9 in (200 mm) |
| Power Supply Form Factor | ATX PS2 |
| Fan Mount Capacity | Top: 3x 120mm / 2x 140mm; Bottom: 3x 120mm / 2x 140mm; Side: 3x 120mm; Rear: 1x 120mm |
| Radiator Support | Top: 240 / 280 / 360 mm; Side: 360 mm; Bottom: 240 / 280 / 360 mm |
| Front I/O Ports | 1x USB 3.2 Gen 2 Type-C, 2x USB 3.2 Gen 1 Type-A, 1x Audio jack, 1x Mic jack |
Primary Sources & Audited Citations
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At a Glance
How reliable is the JONSBO BO400CG V2 according to Mizex audits?
An excellent showcase enclosure for enthusiasts building high-end liquid-cooled or back-connect systems who have the desk space to accommodate a heavy 27.8-pound chassis.
What are the known quirks or drawbacks of the JONSBO BO400CG V2?
Our reliability audit identified the following documented caveats:
- Heavy chassis weight at 27.8 lbs (12.6 kg) unpopulated makes transport and desk repositioning demanding.
- 2.5-inch solid-state drive mounting trays share physical locations with two of the 3.5-inch hard drive bays.
What are the key engineering highlights of the JONSBO BO400CG V2?
The top strengths recorded in our evaluation include:
- Seamless 270-degree pillarless curved tempered glass delivers an unobstructed panoramic showcase view.
- Extensive liquid cooling capability accommodating up to three simultaneous 360mm radiators across top, side, and bottom mounts.
- Comprehensive mainboard tray layout engineered for standard and reverse-connector ATX, Micro-ATX, and Mini-ITX boards.
- Generous interior clearances accommodating graphics cards up to 17.1 in (435 mm) and CPU coolers up to 6.8 in (173 mm).