Lian Li A4-H2OA5 Mini-ITX Case-SFX Layout-PCIe 5.0 Riser-Silver-A4H2OA5 | Triple-Slot Mount GPU, Aluminum Exterior & SPCC Steel Interior, 240mm AIO, SFX Sandwich Layout, PCIe 5.0

The Lian Li A4-H2O is a Mini-ITX PC case designed for builders who want a compact desktop without giving up support for a triple-slot graphics card. Its 11-liter enclosure makes size a central part of the design, while support for a 240mm all-in-one liquid cooler gives builders another option for planning their system. Rather than treating a small footprint as the only priority, this case combines a compact enclosure with specific provisions for graphics hardware and liquid cooling. It makes the most sense for someone who already has a clear idea of the components they want to use.

The sandwich layout is one of the most important design choices. The graphics card sits behind the motherboard, connected through a 240mm PCIe Gen. 5 riser cable. This arrangement allows the case to accommodate a triple-slot GPU within its compact design. The included riser supports PCIe 5.0 and is also compatible with PCIe 2.0, 3.0, and 4.0 devices, according to the listed compatibility range. For a builder choosing a graphics card, that combination makes the riser an important part of the overall hardware plan rather than an accessory to overlook.

Cooling support is another key consideration. The A4-H2O accommodates a 240mm AIO, giving builders a liquid cooling option within the small enclosure. Mesh panels on the bottom, sides, and top provide ventilation around the system, while the aluminum exterior and SPCC steel interior combine two materials in the same chassis. The silver finish offers a restrained look suited to buyers who prefer a minimalist appearance. Extensive mesh also makes ventilation a visible part of the design rather than hiding it behind a solid exterior.

The power supply arrangement deserves attention during component selection. A removable bracket supports SFX and SFX-L power supplies, and a pre-routed power cord extension is included to reduce hardware interference. These provisions are useful within a layout where the motherboard and graphics card occupy separate areas. However, the compact format calls for deliberate planning: buyers need to consider the graphics card, cooling solution, motherboard, and power supply together instead of choosing each component independently and assuming everything will fit.

Verdict: The Lian Li A4-H2O is a strong candidate for builders who want a Mini-ITX PC case with an 11-liter footprint, triple-slot GPU support, and room for a 240mm AIO. Choose it if its sandwich layout and SFX or SFX-L power supply support match your planned components. If you prefer a more spacious enclosure or do not want to plan around a compact internal layout and riser cable, a larger case may be a better fit.

• Product type: Mini-ITX PC case
• Case volume: 11 liters
• Exterior material: Aluminum
• Interior material: SPCC steel
• Graphics card support: Triple-slot GPU mounting
• Cooling support: 240mm AIO
• Layout: SFX sandwich layout
• Power supply formats: SFX and SFX-L
• Riser cable: 240mm PCIe Gen. 5
• Riser compatibility: PCIe 2.0 through PCIe 5.0
• Exterior color options: Black or silver
• Ventilation: Mesh panels on the bottom, sides, and top
• Additional feature: Pre-routed power cord extension
• Design collaboration: Daniel Hansen of DAN Cases

A great fit if you:

• Want a compact desktop enclosure and are specifically planning a Mini-ITX build around an 11-liter case.
• Need to accommodate a triple-slot graphics card without choosing an enclosure designed around a conventional component arrangement.
• Prefer the option of a 240mm AIO and want liquid cooling support included in your case selection criteria.
• Appreciate a minimalist aluminum exterior with mesh ventilation and a choice between black and silver finishes.
• Are planning to use an SFX or SFX-L power supply and want a removable bracket for that component.

Consider something else if you:

• Want more room to arrange components freely, in which case a larger PC case may suit your build better.
• Prefer a build that does not rely on a graphics card riser, making a conventional layout case a more suitable alternative.

Confirm on the listing:

• Check the exact dimensions of the case and measure your intended desk, shelf, or entertainment space to confirm that its footprint suits your setup.
• Verify that your chosen motherboard, graphics card, and cooling arrangement are compatible with the case's compact sandwich layout and triple-slot GPU support.
• Check whether your existing power supply is an SFX or SFX-L unit, and confirm that it matches the supported format.
• Review the package contents and current product version to confirm the included PCIe 5.0 riser cable and any other items you expect to receive.

How to compare your options: Start with component compatibility, case volume, graphics card mounting, and cooling support. The A4-H2O combines an 11-liter enclosure with triple-slot GPU accommodation and support for a 240mm AIO, so these features should be evaluated together rather than separately. Next, consider the exterior finish, ventilation layout, power supply format, and riser generation. Compare those details against your actual parts list and the amount of space you want the finished system to occupy.

Start by planning the complete component combination before committing to the build. Check your motherboard, graphics card, 240mm AIO, and power supply against the case's supported layout. In a compact enclosure, considering the arrangement as a whole helps you make more deliberate choices about how the parts will fit together.

Pay particular attention to the graphics card connection. The included 240mm PCIe Gen. 5 riser is intended to mount the GPU behind the motherboard, so account for that arrangement when selecting and planning your components. Confirm that the riser's stated compatibility covers the graphics hardware you intend to use.

Consider the mesh panels part of your overall system layout. The bottom, sides, and top provide ventilation, so avoid treating the enclosure's appearance as the only factor when planning its placement. Think about how the case will sit in your intended space and how its ventilation surfaces fit into that arrangement.

For ongoing care, follow the manufacturer's instructions for the case and any installed cooling components. Keep your component details and configuration notes together so future changes can be checked against the sandwich layout, supported power supply formats, and cooling provisions before you make adjustments.

Does the Lian Li A4-H2O include a PCIe 5.0 riser cable?
Yes, the listed design includes a 240mm PCIe Gen. 5 riser cable. It connects the graphics card mounted behind the motherboard and supports devices across PCIe 2.0 through PCIe 5.0.

Can this case accommodate a triple-slot graphics card?
Yes, triple-slot GPU mounting is a stated feature. The sandwich layout places the graphics card behind the motherboard, so check your particular card against the current compatibility information before buying.

Does the A4-H2O support liquid cooling?
Yes, it accommodates a 240mm AIO. This makes it an option for builders who want liquid cooling support within an 11-liter enclosure.

Which power supplies does this case support?
The removable bracket supports SFX and SFX-L power supplies. Check your existing unit's format before choosing this case, and confirm the fit of your complete component combination.

What should I check before ordering?
Confirm your motherboard, graphics card, cooling setup, power supply, and available installation space against the current product details. The listing describes the riser cable and key design features, but check the complete package contents and component-specific fit before purchasing.