Compact footprint with Micro-ATX flexibility
This chassis is designed for builders who want the space-saving benefits of a Small Form Factor (SFF) system without the strict component limitations of Mini-ITX. Measuring 420 x 191 x 288 mm, the 21.3-litre volume fits comfortably on small desks. It supports both Micro-ATX and Mini-ITX motherboards, allowing you to choose from a wider range of mainstream boards while retaining four expansion slots for multi-slot expansion cards or capture cards.
Room for high-end graphics cards and CPU coolers
Despite its compact size, the PC-B4W accommodates powerful internal hardware. You can install graphics cards up to 358 mm in length, making it compatible with many triple-fan GPUs. For CPU cooling, the case provides up to 162 mm of height clearance, which expands to 168 mm if you choose to remove the side fan bracket. This clearance lets you use substantial tower air coolers to keep high-TDP processors running optimally.
Versatile power supply and radiator configurations
The internal layout adapts to your choice of power supply and liquid cooling. The chassis supports both standard ATX power supplies up to 140 mm in length and compact SFX units. Your choice of power supply dictates your cooling options: opting for an SFX power supply opens up space to mount a 360 mm radiator on the side, or a 120 mm slim fan at the front. If you use an ATX power supply, the side bracket still supports up to a 240 mm radiator. Out of the box, the case comes equipped with two pre-installed 120 x 120 x 15 mm slim top fans to immediately begin exhausting hot air from the system.
High-speed front panel connectivity
The front I/O panel provides quick access to high-bandwidth ports for external storage and peripherals. It features one USB 3.2 Gen 2x2 Type-C port capable of 20Gbps transfer speeds, alongside two USB 3.0 Type-A ports and a 3.5 mm combo audio jack. This ensures compatibility with modern high-speed external SSDs and headsets without needing to reach behind the chassis.
Manufacturer warranty coverage
The Lian Li B4-mATX Mesh PC-B4W is backed by a 1-year warranty, ensuring long-term reliability for your compact build.
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