This article covers JONSBO BO400 グレー ATX PCケース.
Overview
The JONSBO BO400 is a mid-tower PC case featuring a high-strength T6mm CNC aluminum alloy frame with anodized matte panels. It comes with a metal top cover by default, but the included glass top cover can be swapped in to enable a three-sided view — top, front, and side — for a dramatic showcase of your build. The tool-free buckle opening makes assembly and maintenance effortless. The dual-chamber interior design keeps cable management clean and supports high-performance hardware. This case is suitable for gaming PCs, creative workstations, and any build where aesthetics and cooling matter.
Compatibility Guide
The BO400 supports ATX and Micro-ATX motherboards, including the emerging ATX back-connect (BTF) standard. Power supply is bottom-mounted, accepting ATX PS2 units up to 200mm long. CPU cooler clearance is 173mm, and GPU length clearance is up to 435mm, accommodating large air coolers and top-tier graphics cards. Drive bays support either 2x 2.5" SSDs or 4x 3.5" HDDs. Front I/O includes USB 3.2 Gen 1 Type-A ×2, USB 3.2 Gen 2 Type-C ×1, and a combo audio jack. Expansion slots: 8.
Product Info
The JONSBO BO400 launched in early 2025. Its price sits at approximately ¥134,671 on , placing it in the mid-to-high tier for aluminum cases. It targets users who value both design and expandability — the aluminum frame and optional glass panels offer a premium look while supporting extensive cooling options (up to 3x 360mm radiators or 10 fans). Standard warranty is 1 year.
Best Use Cases
First, it is ideal for gamers building a high-end rig. The ample GPU clearance and 360mm AIO support allow top-tier components. Second, content creators who need a reliable workstation will appreciate the balance of cooling and quiet operation during long renders. Third, modders and aesthetics-focused builders will love the aluminum frame and glass panels, which pair beautifully with RGB fans and custom water loops.
Things to Consider
The case weighs 18.1kg — ensure your desk or floor can support it, and be careful when moving it. The standard top cover is metal; switching to glass requires careful handling to avoid breakage. While front panel filters are included, they are not HEPA-grade and some dust may still enter. Although the case supports ATX back-connect motherboards, those motherboards are still relatively rare, so you may not benefit from that feature immediately. The price might feel high for budget builders, but the build quality and expandability justify the investment. ## Specifications | Item | Specification | |------|---------------| | Model | JONSBO BO400 | | Color | Gray | | Case Type | Mid Tower | | Motherboard Support | ATX / Micro-ATX / ATX Back-Connect | | Material | T6mm CNC Aluminum alloy, anodized matte panels, tempered glass (top optional) | | Dimensions (W×H×D) | 474mm × 489mm × 311mm | | Weight | 18.1 kg | | CPU Cooler Max Height | 173mm | | GPU Max Length | 435mm | | PSU Max Length | 200mm (ATX PS2) | | Expansion Slots | 8 | | Drive Bays | 2x 2.5" SSD or 4x 3.5" HDD | | Front I/O | USB 3.2 Gen 1 Type-A ×2, USB 3.2 Gen 2 Type-C ×1, Audio combo jack | | Fan Support | Up to 10 fans (3x 360mm radiators) | | Accessories | Metal top cover + glass top cover (interchangeable) | | Release Date | Early 2025 |
Product Disclosure (Amazon)
- Manufacturer: JONSBO
- Seller: サザンクロストレーディング
- Fulfilled by: サザンクロストレーディング
- ASIN: B0DS2N2222
- Note: This article covers a manufacturer-made product based on Amazon listing details.