LIAN LI A4 H2O MATX Micro Tower Cabinet (Silver)

The Lian Li A4-H2O (model G99-A4H2OA4-IN) is an 11-litre small form factor case built around the sandwich layout pioneered by the DAN A4-SFX—a collaboration between Lian Li and Daniel Hansen of Dan Cases. Manufactured and sold by Lian Li, the A4-H2O retains the ultra-compact footprint of its predecessor while adding proper AIO liquid-cooling support, making it a compelling choice for builders who want a powerful, console-sized PC without sacrificing thermal headroom. The exterior is precision-crafted from aluminium in a silver finish, while the interior uses SPCC steel for structural rigidity. Measuring just 326 mm (D) × 140 mm (W) × 244 mm (H), the chassis achieves an 11-litre total volume—small enough to sit beside a gaming console or inside an entertainment centre. All four panels (front, side, top, and bottom) are fully removable, giving unobstructed access during builds and simplifying cable management. Despite its compact dimensions, the A4-H2O accommodates a triple-slot graphics card of up to 322 mm in length through its sandwich layout, where the GPU sits vertically behind the motherboard. The included PCIe 4.0 riser cable (backwards-compatible with PCIe 3.0) enables this vertical GPU orientation and supports transfer rates of up to 16 GT/s. A pair of extra standoffs is provided to push dual-slot GPUs toward the side panel for optimised airflow. For cooling, the top compartment accepts a single 240 mm radiator with a maximum combined fan-and-radiator thickness of 55 mm, or two 120 mm fans without a radiator. A removable top bracket simplifies AIO installation considerably. CPU air-cooler height is limited to 55 mm, making low-profile coolers the correct choice. Power comes from SFX or SFX-L supplies only; a dedicated removable mounting bracket and a pre-routed power-cord extension are included. Storage is limited to one 2.5-inch SSD mounted on the removable bottom panel. The front I/O panel, recessed into the left side of the chassis, provides one USB 3.0 Type-A port (internal 19-pin), one USB 3.1 Type-C port (internal Key-A), one microphone jack, and one HD Audio port, topped by a premium power button. Verified Specifications: • Model: G99-A4H2OA4-IN • Dimensions: 326 mm (D) × 140 mm (W) × 244 mm (H) • Volume: 11 litres • Motherboard Support: Mini-ITX • Materials: Aluminium exterior / SPCC steel interior • Colour: Silver exterior, matte black interior • GPU Clearance: Max 322 mm (3 expansion slots) • Radiator Support: 1× 240 mm top (max 55 mm total thickness with fans) • Fan Support: 2× 120 mm top • CPU Cooler Clearance: Max 55 mm • PSU Support: SFX, SFX-L • Riser Cable: PCIe 4.0 (PCIe 3.0 compatible) • Drive Support: 1× 2.5-inch SSD • Front I/O: 1× USB 3.0 Type-A, 1× USB 3.1 Type-C, 1× Mic, 1× HD Audio • Warranty: 1 year