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Case Lian Li A4-H2O X4, Mini-ITX, PCIe 4.0, Black

Lian Li 4718466011497 A4H2OX4 CASLIL054
BAR Code: 4718466011497
SKU Code: A4H2OX4
User Code: CASLIL054
Warranty: 2 years
Case Lian Li A4-H2O X4, Mini-ITX, PCIe 4.0, Black
In stock

Celebrate the small form factor PC with the LIAN LI A4-H2O. With just 11L capacity, this PC case has an incredibly small footprint but an intelligent design, maximising hardware capacity. With three expansion slots, this case can accommodate a triple slot GPU, up to 322mm long, which connects to a Mini-ITX motherboard via the included PCIe 4.0 riser cable. Every panel is removable for ease of access, with many sporting a fine mesh for excellent ventilation. This model can accommodate a 240 AIO with the radiator in a dedicated chamber. Big power in a small chassis.

Economic Footprint

The LIAN LI DAN Cases A4-H2O is the ultimate celebration of the small form factor case. This Mini-ITX chassis has an incredibly small footprint, making it ideal for use as either a gaming PC or a console alternative. With its robust steel interior and sand-blasted aluminium panelling, this is a sleek case with a premium finish. At just 244mm tall and 140mm wide, this case effortlessly integrates within any gaming environment.

Sandwich Layout

To maximise on hardware, the LIAN LI DAN Cases A4-H2O features an intelligent sandwich layout design. Each area is specifically designed to cater for hardware that goes beyond the expectation of the Mini-ITX form factor. This chassis can hold an SFX power supply as standard or, alternatively, the mounting bracket can be removed to accommodate for an SFX-L PSU. The motherboard is mounted on the left-hand side of the middle divider, with support for the Mini-ITX format only. Behind this, there is a dedicated area that allows for triple-slot graphics cards up to 322mm long. A truly remarkable feat, the LIAN LI DAN Cases A4-H2O does all this with space for a 240mm radiator as part of an AiO cooling loop, with a CPU cooler up to 55mm tall. Under the top panel, there is a fan bracket that can be removed and replaced with a 240mm radiator, up to 55mm thick. Unlike its predecessor, the A4-SFX, this case is fully capable of water cooling your high-end hardware.

Ease of Use

With so much going on in a small space, to make installation easier every panel on the LIAN LI DAN Cases A4-H2O can be removed. This grants greater access to the interior, enabling you to manage cables and instal hardware with the greatest of ease. Additionally, the steel framework features an opening to aid in mounting longer GPUs. Upon the bottom panel, there is a mounting bracket for a 2.5" SSD, with ventilation placed beneath to prevent the hardware from overheating. There is ample ventilation throughout the LIAN LI DAN Cases A4-H2O thanks to the fine mesh featured on the side and top panels. Promoting outstanding natural airflow, this will work perfectly with the AiO cooler to keep your gaming PC at optimum temperature.


The LIAN LI DAN Cases A4-H2O comes in two colours. This model is black, with the other choice being silver. What's more, as the GPU can only be mounted vertically a PCIe riser cable is included with the case. Choose between the industry-standard PCIe 3.0 or next-gen PCIe 4.0, depending on the needs of your graphics card. This model comes with the PCIe 4.0 riser cable that can be discretely tucked behind the motherboard when installing.


In a stylish recess, the I/O panel rests on the left-hand side of the LIAN LI DAN Cases A4-H20. At the top is a premium-grade power button, whilst the bottom plays host to one USB 3.1 Type C, one USB 3.0 Type A, and two jacks dedicated to microphones and audio.

Notice: Due to the compactness of the case, the space for 240-mm AiOs is limited. Please pay attention to the exact dimensions of the radiator and the CPU cooler when purchasing your water cooling system.


  • Dimensions: 140mm x 244mm x 326mm (W x H x D)
  • Material: Aluminium (anodised, sand-blasted)
  • Weight: 2,9kg
  • Capacity: 11l
  • Colour: Black
  • Formfactor: Mini-ITX
  • Fan Support:
    • 2x 120mm (Top)
  • Radiator Support:
    • 1x 290mm x 125mm x 30mm (L x W x H, Top, max. 55mm in height with fans)
  • Drive Support:
    • 1x 2,5" (Floor)
  • PSU: SFX or SFX-L (optional)
  • PCI Slots: 3 (Triple slot)
  • I/O-Panel:
    • 1x USB 3.1 (Type C, USB 3.2 Gen 2, max. 10 Gbit/s, internal)
    • 1x USB 3.0 (Type C, USB 3.2 Gen 1, max. 5 Gbit/s, internal)
    • 2x Audio (3,5mm, In / Out)
  • Feature: PCIe 4.0-Riser cable included
  • Max height CPU cooler: 55mm
  • Max length GPU: 322mm
  • Max height GPU: 3 slot (60mm)


Product Type PC Case
Form factor Mini-ITX
Supported Motherboards Mini-ITX
Number of Expansion Slots 3
Drive support 1x 2.5"


Radiator Compatibility 240 mm
Maximum CPU Cooler Height 55 mm
Maximum GPU Length 322 mm
Dimensions 140 x 244 x 326 mm
Official website Lian Li A4-H2O
Weight 2.9 kg


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