Lian Li B4 mATX Mesh PC Case - Black

Name: Lian Li B4 mATX Mesh PC Case - Black
Brand: LIAN LI
SKU: e5as76wtvg
Availability: InStock

The Lian Li B4-mATX is a compact 21.3-litre small form factor case co-developed with DAN Cases, su...

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Colour

Black White

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Product Information

Full details

The Lian Li B4-mATX Mesh PC Case is an ideal choice for enthusiasts and power users who need to pack high-performance hardware into an ultra-compact, 21.3-litre chassis. Co-developed with DAN Cases, this enclosure offers exceptional flexibility by supporting both Micro-ATX and Mini-ITX motherboards, high-end graphics cards, and large cooling solutions, though its extreme compactness requires careful planning for cable management compared to traditional mid-tower cases.

All features

Colour	Black
Release Year	2024
Model Part Number	G99.B4X.00
Brand	LIAN LI

Extended Product Information

FAQs

Can this case fit a standard ATX power supply?

The case is designed for compact builds; please verify your specific power supply dimensions against the official clearance documentation provided with the chassis.

Is the vertical orientation stable?

Yes, the vertical orientation is engineered to be stable and reduces the overall footprint by roughly 30 percent.

Does it come with pre-installed fans?

Yes, the B4-mATX comes with two 120mm slim fans pre-installed.

Can I fit a 360mm radiator?

Yes, the case is specifically designed to accommodate radiators up to 360mm.

What is the maximum CPU cooler height?

The case supports CPU air coolers up to 168mm in height.

Does this case include a PCIe riser cable?

Please check your specific bundle contents, as requirements for riser cables depend on your chosen GPU mounting configuration.

Troubleshooting

Difficulty closing side panels

Ensure that thick 24-pin or GPU power cables are not bulging against the panel; use the included tie-down points to flatten cable runs.

High GPU temperatures

Ensure the anti-sag bracket is properly installed to improve airflow around the GPU fans, and check that no cables are obstructing the intake area.

Pros and Cons

Pros

Ultra-compact footprint saves significant desk space
Supports large 360mm radiators for liquid cooling
Versatile orientation options (horizontal or vertical)
Accommodates full-length high-end GPUs up to 358mm
Includes a dedicated GPU anti-sag bracket

Cons

Small volume necessitates disciplined cable management
Requires careful planning for component clearance
Advanced build experience recommended for complex cooling setups

Setup, Compatibility & Care

Motherboard Selection: Confirm your motherboard is either Micro-ATX or Mini-ITX form factor before beginning your build.
Cable Routing: Utilize the provided cable management channels early in the assembly process to avoid blocking airflow paths.
Orientation Choice: Decide on your preferred orientation (horizontal/vertical) early, as this influences the placement of the AC power connector.
Tool-less Panels: Simply pull the side panels to remove them; ensure they are fully seated when replacing to maintain structural integrity and airflow.
Maintenance: Regularly dust the mesh front and side panels to prevent thermal degradation and maintain the case's aesthetic appeal.