Lian Li DAN Cases B4 PC Case, Micro-ATX - white

The Lian Li x DAN Case B4 Micro-ATX is a compact SFF case for Micro-ATX hardware in a small space. With a volume of 21.3 litres, the case remains space-saving but offers room for large graphics cards, CPU coolers up to 166.5 mm in height, and flexible PSU configurations. The white mesh design is focused on airflow and works both in vertical and horizontal operation.

• 21.3-litre SFF case: Compact format with Micro-ATX support
• Space for the GPU: Graphics cards up to 358 mm supported
• Flexible PSU mounting: Supports ATX and SFX power supplies
• Cooling ready: Two addressable 120 mm fans pre-installed
• Positioning as desired: Usable vertically or horizontally

Lian Li x DAN B4 Mesh White: Micro-ATX in a compact 21.3-litre format

The B4 Mesh is designed for powerful hardware in a small form factor. You can install a Micro-ATX motherboard and fit graphics cards up to 358 mm in length. There is also room for CPU cooling: air coolers can be up to 166.5 mm tall.

ATX and SFX PSUs: More freedom in power supply choice

For power supply, you have mounts for both ATX and SFX power supplies. If you want to install an ATX PSU, models up to 140 mm in length are possible. Depending on your PSU choice, the space available for cooling changes – especially important if you plan to install a radiator.

The rotatable AC connector makes cable management easier in both case orientations. When lying flat, the connector faces outwards. When standing, you can turn it inwards so excess cable length is hidden inside the case.

Cooling in the Lian Li DAN Cases B4: Mesh panels and flexible fan mounts

• 2x 120 mm fans pre-installed
• Front fan on removable bracket
• Radiator support up to 360 mm with SFX PSU or 140 mm with ATX PSU

The mesh supports airflow through the case. Two 120 mm fans are installed from the factory. Additionally, you can mount 120 mm fans at the bottom and front of the case. The front fan sits on a removable bracket, making it easier to access the interior and tailor cooling to your setup.

Radiator support depends on your PSU choice

For water cooling, the B4 offers two different options. With an SFX PSU, you can comfortably install a 360 mm radiator. If you use an ATX PSU, a 140 mm radiator is possible. This lets you decide whether you prefer more radiator space or a classic ATX power supply configuration.

Mesh edition: Airflow and sturdy steel structure

The mesh design keeps the B4 case focused on airflow – regardless of whether you use it lying flat or standing up. The steel structure inside supports and protects your hardware, while the simple exterior gives your build a clean, minimalistic look.