Lian Li A4-H2OX5 Mini-ITX PC case 11L 240mm AIO triple-slot GPU black

Compact 11-Litre Mini-ITX Chassis

The Lian Li A4-H2OX5 is an 11-litre small form factor case built around a Mini-ITX motherboard and a sandwich layout. It accommodates a triple-slot graphics card up to 322 mm long and includes a PCIe 5.0 riser cable to mount the GPU behind the board. A 240 mm radiator fits in the top panel with a maximum 55 mm total thickness including fans. The aluminium exterior and removable bottom dust tray complete the package.

Verify Motherboard Layout and Power Supply Fit

Confirm your Mini-ITX board places the CPU socket within the 55 mm cooler height limit and that the PCIe slot aligns with the supplied riser cable. The case accepts only SFX or SFX-L power supplies, so an ATX unit will not fit. Ensure the graphics card does not exceed the 322 mm length allowance and that its slot thickness matches the triple-slot mounting design. Front-panel connectivity provides USB 3.1 Type-C, USB 3.0 Type-A, HD audio and a microphone jack.

Top 240 mm Radiator Handles Sustained Heat Loads

Mounting a 240 mm AIO in the top position with two 120 mm fans gives the system a direct exhaust path for CPU heat during extended sessions. The 55 mm combined thickness limit keeps the radiator-and-fan stack slim enough to maintain airflow without recirculation. Aluminium side panels add passive surface area while the sandwich layout separates the GPU chamber from the motherboard, letting each component draw fresh air independently over long periods.