JONSBO BO400 ATX Mid Tower PC Case - Aluminum Dual Chamber Design

In this review of the JONSBO BO400 ATX PC case, the bottom line is simple: builders who want a refined aluminum frame, clean dual-chamber layout, and flexible three-sided display will find a compelling option here. The case stands out because of its T6mm CNC aluminum alloy frame and interchangeable glass top that converts the default metal cover into a true three-sided side view, making component presentation a priority. It is best for system builders who need long GPU clearance and strong cooling support without compromising a minimalist, brushed-aluminum aesthetic.

Key Features

• Aluminum frame: The T6mm CNC aluminum alloy construction gives the chassis a rigid feel and a premium anodized brushed finish that resists fingerprints and shows 3D texture.
• Three-sided display option: The included glass top cover replaces the metal top to reveal the top, front, and side for a full display of internal components and RGB lighting.
• Dual chamber layout: The separated chambers keep power and storage isolated from the motherboard and GPU area, improving airflow and cable management.
• Cooling capacity: Supports up to three 360mm AIO radiators and up to ten fan locations, enabling serious water cooling or multi-fan air setups for high-performance CPUs and GPUs.
• Component compatibility: Accepts ATX and Micro-ATX boards, GPU lengths up to 435mm, CPU coolers up to 173mm tall, and PSUs up to 200mm, accommodating large components without compromise.
• Tool-free access: The tool-free buckle opening simplifies assembly and regular upgrades, making the case easier to work with than traditional screw-only panels.

Who It's For

The BO400 is aimed at enthusiasts and gamers who want a premium-looking rig with workstation-size component support; if you value presentation, the optional glass top and three-sided view make it ideal for systems with RGB and high-end GPUs. Builders who need extensive cooling options or intend to run custom or large AIO loops will appreciate the support for multiple 360mm radiators.

It is less suitable for ultra-budget builds where aluminum construction is unnecessary or for users who require a tiny footprint; compact ITX builders should look elsewhere. Also, if you need more than four 3.5 HDD bays the BO400 favors drive flexibility for mixed SSD/HDD setups but is not a dedicated storage chassis.

Pros & Cons

Pros

• Premium T6mm CNC aluminum alloy frame and anodized brushed panels provide a sturdy, attractive enclosure.
• Interchangeable glass top enables a three-sided viewing experience for component showcase.
• Excellent cooling and compatibility: supports 3x 360mm radiators, 435mm GPUs, and a 173mm CPU cooler.
• Tool-free buckle design simplifies building and maintenance.

Cons

• Aluminum construction can raise the price compared with standard steel cases, so it may not be the best pick for strictly budget builds.
• Storage layout favors a mix of SSDs and a few HDDs rather than large multi-bay 3.5 storage arrays.

Specifications

Case type	ATX Mid Tower
Frame material	T6mm CNC aluminum alloy, anodized brushed panel
Motherboard support	Micro-ATX / ATX (back-connect BTF)
GPU length	Up to 435mm
PSU length	Up to 200mm
CPU cooler height	Up to 173mm
Drive bays	2 x 2.5 SSD or 4 x 3.5 HDD

Our Verdict

The JONSBO BO400 is a thoughtfully engineered mid tower that balances premium aluminum styling with practical high-performance support; it is a strong choice for builders who want good cooling options, long GPU clearance, and a showcase-friendly three-sided view. For those who prioritize component display and future-proof compatibility over minimal cost, the BO400 delivers solid value and an easier build experience thanks to its dual-chamber design and tool-free access.

Frequently Asked Questions

Can the top panel be swapped for glass?
Yes, the factory metal top cover is replaceable with the included glass top cover to enable a three-sided display.

What radiator and GPU sizes are supported?
The case supports up to three 360mm AIO radiators and GPUs up to 435mm in length.

How many drives can it hold?
It supports up to two 2.5 SSDs or up to four 3.5 HDDs in the provided layout.