Lian Li
A4-H2O Mini-ITX PC Case, Triple-Slot Mount GPU, Aluminum Exterior & SPCC Steel Interior, 240mm AIO, SFX Sandwich Layout, PCIe 4.0, Supports SFX/SFX-L PSU (A4-H2O A4 Black)
*Price sourced from Amazon.com. Last updated 2026-07-23. Price and availability subject to change.
Bottom line: The A4-H2O Mini-ITX PC Case, Triple-Slot Mount GPU, Aluminum Exterior & SPCC Steel Interior, 240mm AIO, SFX Sandwich Layout, PCIe 4.0, Supports SFX/SFX-L PSU (A4-H2O A4 Black) is a niche pick — read recent reviews before buying in the pc cases category, priced around $154.99. Read recent reviews carefully before committing.
SpecPicks Verdict
SpecPicks classifies Lian Li A4-H2O Mini-ITX PC Case, Triple-Slot Mount GPU, Aluminum… as a niche pick — read recent reviews before buying in the pc cases category, based on our editorial and benchmark analysis and our ranking model that weights rating × review-volume × price-fit. Lian Li's positioning sits within the broader category mid-tier. Use the Compare tool to put it side-by-side with two or three close alternatives before clicking through to Amazon.
Common buyer scenarios for pc cases of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the Amazon listing before purchase. Prices, stock, and Prime eligibility update directly from Amazon's catalog and may have moved since this page was last verified.
Pros & Cons
Pros
- ✓ Backed by Lian Li's warranty and support channels
- ✓ Ships via Amazon with Prime eligibility and the standard returns policy
Cons
- ✗ Confirm socket / form-factor / power-rating compatibility against your build before ordering
- ✗ Price, stock, and Prime eligibility update from Amazon and may have changed since this page was last verified
Key Features
- Compact 11-Liter Design: The A4-H2O is one of the smallest cases on the market at just 11 liters, yet it supports a triple-slot GPU and accommodates 240mm AIO water cooling, striking the perfect balance between size and performance.
- Elegant Minimalist Aesthetic: Featuring a premium aluminum exterior available in black or silver, the A4-H2O showcases a minimalist design with extensive ventilation, making it a stylish addition to any living or entertainment space.
- Innovative Sandwich Layout: Mounts the GPU behind the motherboard to maximize space and airflow. Removable front panel creates a wide opening for easy GPU installation, supporting triple-slot graphics cards up to 322mm, with full mesh panels on all sides for direct cooling.
- Easy AIO Installation: A removable top bracket simplifies the installation of radiators up to 240mm in length, accommodating a fan-radiator combination with a thickness of up to 55mm for efficient cooling.
- Compatibility: Designed to support both SFX and SFX-L power supplies, the case includes a pre-routed power cord extension to prevent interference with other components, streamlining the installation process.
- Collaboration with DAN Cases: The A4-H2O is a collaborative project with Daniel Hansen of DAN Cases.
Full Specifications
| Brand | Lian Li |
|---|---|
| Color | Black |
| Fan Size | 120 Millimeters |
| Material | Aluminum, SPCC Steel |
| Case Type | Mini-Tower |
| Model Name | A4-H2O X4 BLACK |
| Light Color | Blue |
| Model Number | A4-H2O X4 BLACK |
| Compatibility | PC |
| Cooling Method | Air |
| Number of Fans | 2 |
| Mfr Part Number | A4-H2O X4 BLACK |
| Total Usb Ports | 2 |
| Antenna Location | Gaming |
Ready to buy?
Lian Li A4-H2O Mini-ITX PC Case, Triple-Slot Mount GPU, Aluminum Exterior & SPCC Steel Interior, 240mm AIO, SFX Sandwich Layout, PCIe 4.0, Supports SFX/SFX-L PSU (A4-H2O A4 Black) is available on Amazon with Prime shipping and the full Amazon returns policy. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.
*Price sourced from Amazon.com. Last updated 2026-07-23. Price and availability subject to change.
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