Lian Li A4H2OX5 M-ITX Mini Tower Case

The Lian Li A4-H2O X5 (model G99-A4H2OX5-IN) is an 11-litre small form factor Mini-ITX chassis developed in collaboration with Daniel Hansen of DAN Cases. Drawing inspiration from the original DAN A4-SFX sandwich layout, the A4-H2O X5 refines that proven concept to accommodate AIO liquid cooling and modern high-power graphics cards inside a volume that rivals mainstream gaming consoles. The defining structural choice is the sandwich layout: the motherboard and GPU occupy parallel planes separated by the case's narrow 140 mm width. A bundled PCIe 5.0 riser cable — rated for up to 32 GT/s and backward compatible with earlier PCIe generations — mounts the GPU vertically behind the motherboard, freeing the top compartment for a radiator of up to 240 mm in length. A removable top bracket simplifies AIO installation, and the combined fan-plus-radiator stack may be up to 55 mm thick in that position. Despite its compact footprint of 326 mm (D) × 140 mm (W) × 244 mm (H), the chassis accommodates graphics cards up to 322 mm long across three expansion slots. Dedicated standoffs push dual-slot GPUs toward the side panel to improve exhaust or intake airflow, while mesh panels on the top, sides, and bottom allow fresh air to circulate directly over components. CPU cooler height is capped at 55 mm, making low-profile tower coolers or the included AIO bracket the appropriate thermal solutions. Power supply compatibility covers both SFX and SFX-L form factors via a removable mounting bracket. A pre-routed power-cord extension is included to keep cable runs tidy. Storage is handled by a single 2.5-inch SSD that attaches to the removable bottom panel, which also doubles as a cable management access point. The anodized aluminum exterior (matte black interior is SPCC steel) is available in black or silver. Front I/O, recessed into the left side panel, provides a USB 3.0 Type-A port (internal 19-pin header), a USB 3.1 Type-C port (internal Key-A header), a microphone jack, and an HD-Audio port, alongside a premium power button. Verified Specifications: • Dimensions: 326 mm (D) × 140 mm (W) × 244 mm (H) • Volume: 11 litres • Motherboard support: Mini-ITX • Expansion slots: 3 • Max GPU length: 322 mm • Max CPU cooler height: 55 mm • Radiator support: 1× 240 mm top (max 55 mm combined thickness with fans) • Fan support: 2× 120 mm (top) • PSU support: SFX, SFX-L • Drive support: 1× 2.5-inch SSD • Riser cable: PCIe 5.0 (32 GT/s, backward compatible), included • Front I/O: 1× USB 3.0 Type-A, 1× USB 3.1 Type-C, 1× Mic, 1× HD-Audio • Exterior material: Anodized aluminum • Interior material: SPCC steel • Color (this SKU): Anodized Black exterior / Matte Black interior • Warranty: 1 year