Lian Li launches B4-mATX small form factor case

Lian Li has announced the B4-mATX, a 21.3-litre small form factor chassis co-developed with Dan Cases. Now available, the compact enclosure supports mATX motherboards and can be oriented either horizontally as a desktop unit or vertically as a space-saving tower.

The B4 case rotates 90º into a vertical orientation, reducing the desktop footprint by 30%. A rotatable AC inlet adjusts to both configurations, turning outward for cable access or inward to absorb excess length. A swivelling cable bracket below the PCIe slots keeps the rear I/O flush against the case, offering up to 52mm of connector clearance. Lian Li provides front-panel options in mesh or real wood (walnut or beech) across black or white finishes.

The chassis ships with two pre-installed 120x120x15mm slim exhaust fans on a removable bracket. It supports graphics cards up to 358mm across four expansion slots, and CPU coolers up to 162mm tall, or 168mm tall with the side bracket removed. Dedicated brackets fit an SFX or a 140mm ATX power supply. Using an SFX unit enables side radiator compatibility up to 360mm, while an ATX model limits it to 240mm. Drive options support a 3.5-inch HDD or 2.5-inch SSD at the bottom, plus a 2.5-inch SSD at the front.

An optional B4-mATX Vertical AeroDeck accessory adds tempered glass panels and expands capacity by up to three 120mm or two 140mm fans. Pricing starts at $69.99/€69.99 for the black Mesh version and ranges up to $89.99/€89.99 for the white Wood model. The AeroDeck costs $29.99/€29.99.

KitGuru says: The dual-orientation design, relatively low price, and inclusion of real wood aesthetic options make the B4-mATX a highly versatile entry into the SFF case market.

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