Lian Li B4 Lian PC tower case

Build like never B4.

Codeveloped with DAN Cases, the B4mATX´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.

Compact Design, Broad Compatibility.

With a compact 21.3L volume, the B4mATX delivers impressive hardware compatibility, supporting MATX motherboards, 360mm AIOs, 140mm ATX PSUs, and up to 358mm 4slot GPUs.

Minimal Design,Multiple Styles.

The B4mATX offers a clean mesh panel for an airflowfocused look or a real wood panel for a warmer, refined setup.

Both support fronttoback 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.

Rotatable AC Power Connector.

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 aircooling performance by up to 1°C.

Recommended Liquid Cooling Configuration.

The B4mATX supports 360mm and 280mm radiators with up to 52mm total thickness.

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.

PREINSTALLED 15MM SLIM FANS.

Flexible Airflow Design.

Two preinstalled 120 × 120 × 15mm slim fans on the top provide enhanced cooling performance.

Operating up to 1800 RPM, they are daisychained to reduce cable clutter.

Flexible GPU & Fan Support.

Supports up to 358mm long 4slot graphics cards.

Bottom fan support varies by GPU thickness:2.5slot GPUs support 25mm fans, 3slot GPUs support 15mm slim fans, and 3.5slot 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.

PreInstalled.

GPU AntiSag Bracket.

Built to handle GPUs up to 4 slots thick and 358mm long, the case comes equipped with a dedicated antisag bracket to ensure stability and prevent sagging.

Modular Design, Easier Installation.

Toolless 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 8pin cables, while also making it simpler to configure the fronttop fan as intake for aircooler setups.

Easier Cable Management.

Cable tie points around the PSU and top brackets help secure CPU 8pin 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.

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.

ACCESSIBLE CONNECTIVITY.

The I/O layout keeps essential ports easy to reach in both traditional and vertical layouts, with a highspeed USB TypeC port supporting up to 20Gbps transfer speeds.

In Collaboration with DAN Cases.

Codeveloped with Daniel Hansen of DAN Cases, the B4mATX combines flexible modularity with LIAN LI´s precision craftsmanship in a compact form.

Hard Compatibility.

Toolless removable panels offer quick and easy access for installation and cable routing, while a removable bottom dust filter helps maintain a clean system.Lian Li B4mATX Mesh.

Form factor:Mini Tower.

Type:PC, Product.

colour:White.

Supported power supply form factors:SFX, ATX.

Front fans diameters supported:120 mm, Side fans diameters.

supported:120,140 mm, Rear fans diameters.

supported:120 mm.

Supported HDD sizes:2.5,3.5, SSD form factor:2.5.

Width:191 mm.

Depth:420 mm.

Height:288 mm.