Description
Build like never B4
Co-developed with DAN Cases, the B4-mATX’s modular design unlocks versatile build possibilities. With multiple color, panel, and layout options, plus an optional accessory, it adapts to a wide range of styles.
B4-mATX Wood Black
B4-mATX Mesh White
B4-mATX Mesh Black (Vertical)
B4-mATX Wood White (Vertical)
B4-mATX Wood + Vertical AeroDeck Black
B4-mATX Mesh + Vertical AeroDeck Black
Note: The Vertical AeroDeck is sold separately.
Compact Design, Broad Compatibility
With a compact 21.3L volume, the B4-mATX delivers impressive hardware compatibility, supporting M-ATX motherboards, 360mm AIOs, 140mm ATX PSUs, and up to 358mm 4-slot GPUs.
Minimal Design,Multiple Styles
The B4-mATX offers a clean mesh panel for an airflow-focused look or a real wood panel for a warmer, refined setup. Both support front-to-back airflow, balancing cooling performance with a streamlined exterior.
Vertical Mode,Maximized Desk Space
The vertical layout improves desk space efficiency by up to 30%. Integrated rear feet allow quick and easy switching between different usage modes.
Note: In vertical mode, the rear clearance for the connector and cable routing is 52mm in total. Please ensure your HDMI / DP cable fits within this space.
Rotatable AC Power Connector
(Rotate outward)
(Rotate inward)
Designed for both horizontal and vertical configurations, the rotatable AC inlet adapts to your setup. Face it outward for convenient cable access, or rotate it inward in vertical mode to avoid clearance limitations.
REVERSIBLE Rear Fan Bracket
The rear fan bracket features a reversible design for greater layout flexibility. It can be installed outward to create more clearance for liquid cooling, or inward to position the fan closer to the CPU airflow path and improve CPU air-cooling performance by up to 1°C.
(Inward)
(Outward)
Note: The rear fan bracket supports standard 120mm fans only.
Recommended Liquid Cooling Configuration
The B4-mATX supports 360mm and 280mm radiators with up to 52mm total thickness.
360 / 280mm AIO Setup
■ SFX PSU + M-ATX motherboard
■ 3 x Bottom fans
■ 2 x Top slim fans (pre-installed)
240mm AIO Setup
■ 140mm ATX PSU + M-ATX motherboard
■ 3 x Bottom fans
■ 2 x Top slim fans (pre-installed)
■ 1 x Rear fan
Note: Due to internal space limitations, fans must be installed outwards when using liquid cooling.
240mm AIO Installation Setup:
■ SFX PSU + M-ATX motherboard
■ Bottom fans ×3
■ Front fan ×1
■ Rear fan ×1
■ Top slim fans ×2 (pre-installed)
280mm AIO Installation Setup:
■ SFX PSU + M-ATX motherboard
■ Bottom fans ×3
■ Rear fan ×1 / Front fan ×1
■ Top slim fans ×2 (pre-installed)
Note: Due to internal space limitations, fans need to be installed outside the chassis when installing an AIO liquid cooler.
Recommended Air Cooling Configuration
162mm Air Cooler Setup
■ SFX PSU + M-ATX motherboard
■ 3 x Bottom fans
■ 1 x Side fan
■ 1 x Rear fan
■ 1 x Front slim fan
■ 2 x Top slim fans
(pre-installed; front fan flipped to intake)
168mm Air Cooler Setup
■ 140mm ATX PSU + M-ATX motherboard
■ 3 x Bottom fans
■ 1 x Rear fan
■ 2 × Top slim fans
(pre-installed; front fan flipped to intake)
Note: Due to internal space limitations, fans need to be installed outside the chassis when installing an AIO liquid cooler.
PSU Hardware Compatibility
Tool-less removable panels offer quick and easy access for installation and cable routing, while a removable bottom dust filter helps maintain a clean system.
Note: When installing a 15mm-thick slim front fan, the maximum GPU length is limited to 343mm. The total thickness of the radiator and fan must not exceed 52mm.
Flexible Cooling Configuration
Top: 2 × 120mm slim fans (pre-installed)
Side: 3 × 120mm fans / 2 × 140mm fans or 360mm / 280mm / 240mm radiator
Rear: 1 × 120mm fan
Bottom: 3 × 120mm fans / 2 × 140mm fans
Front: 1 × 120mm slim fan
(Note: The front slim fan is not supported with 360mm radiator or ATX PSU installation.)
Note: To install three 120mm fans, the PCIe accessory below the PCIe slots must be removed.
Extra Intake, Better Cooling
Supports a 120 × 120 × 15mm slim front fan with an SFX PSU and GPU under 343mm long, helping improve intake airflow.
PRE-INSTALLED 15MM SLIM FANS,
Flexible Airflow Design
Two pre-installed 120 × 120 × 15mm slim fans on the top provide enhanced cooling performance. Operating up to 1800 RPM, they are daisy-chained to reduce cable clutter.
Flexible GPU & Fan Support
Supports up to 358mm long 4-slot graphics cards. Bottom fan support varies by GPU thickness: 2.5-slot GPUs support 25mm fans, 3-slot GPUs support 15mm slim fans, and 3.5-slot or thicker GPUs do not support bottom fans.
Easy GPU Installation
The removable front fan bracket lets large graphics cards slide in from the front side of the chassis for a smoother installation process.
Pre-Installed
GPU Anti-Sag Bracket
Built to handle GPUs up to 4 slots thick and 358mm long, the case comes equipped with a dedicated anti-sag bracket to ensure stability and prevent sagging.
Modular Design, Easier Installation
Tool-less removable panels offer quick and easy access for installation and cable routing, while a removable bottom dust filter helps maintain a clean system.
Removable Top Fan Bracket
The removable top fan bracket provides easier access for routing and managing CPU 8-pin cables, while also making it simpler to configure the front-top fan as intake for air-cooler setups.
Easier Cable Management
Cable tie points around the PSU and top brackets help secure CPU 8-pin and PSU cables for a cleaner, more organized build.
In vertical mode, a removable bracket and rotatable cable guide work together to route cables cleanly through the bottom of the case.
Note: 52mm of total desk clearance is recommended for standard HDMI / DP cable routing. Longer connectors may require an adapter.
Vertical AeroDeck
(Optional Accessory)
In vertical layout, the Vertical AeroDeck enhances GPU cooling while maintaining a cohesive look with the case. It supports up to three 120mm or two 140mm fans, includes a PVC dust filter, and features tempered glass side panels to showcase fan side-frame lighting.
Note: Installation requires repositioning the I/O module.
Flexible Storage Support
Supports 1 x 2.5” SSD at the front, with space at the bottom for either 1 x 2.5” SSD or 1 x 3.5” HDD.
Note: Installing a 3.5″ HDD on the bottom limits GPU thickness to 65mm and allows for only one 120mm bottom fan. With a 2.5″ SSD installed, two 120mm bottom fans can be supported.
ACCESSIBLE CONNECTIVITY
The I/O layout keeps essential ports easy to reach in both traditional and vertical layouts, with a high-speed USB Type-C port supporting up to 20Gbps transfer speeds.
In Collaboration with DAN Cases
Co-developed with Daniel Hansen of DAN Cases, the B4-mATX combines flexible modularity with LIAN LI’s precision craftsmanship in a compact form.
