This article covers Lian Li A4-H20 アルミニウム Mini-ITX コンピューターケース.

Overview

The Lian Li A4-H20 is an 11-liter ultra-compact PC case developed in collaboration with DAN Cases. Despite its tiny footprint, the sandwich layout allows for triple-slot graphics cards and a 240mm AIO liquid cooler simultaneously. The exterior is crafted from premium aluminum, available in black or silver. This case is designed for users who want high-end hardware without sacrificing desk space. It supports only Mini-ITX motherboards and requires an SFX power supply. The A4-H20 is ideal for building a powerful yet space-efficient gaming rig or a living room PC that blends into any environment.

Compatibility Guide

The A4-H20 is strictly Mini-ITX only — standard ATX or Micro-ATX boards will not fit. Power supply must be SFX or SFX-L, mounted at the bottom. Graphics card clearance is up to 322mm in length and 3 slots thick. CPU cooler height is limited to 55mm for air coolers, or you can install a 240mm radiator for AIO liquid cooling. Storage is limited to two 2.5-inch drives.

Product Info

Released in 2022, the Lian Li A4-H20 sits in the mid-to-high-end SFF case segment. Its price is around the mid-20,000 yen range. The aluminum construction and collaboration with DAN Cases give it a refined, minimalist look. Front I/O includes two USB 3.0, two USB 2.0, and one USB-C port. A PCIe riser cable (Gen3 or Gen4) is included for vertical GPU mounting.

Best Use Cases

First, it is perfect for compact gaming PCs. With support for a 240mm AIO and triple-slot GPU, you can build a system with a Core i7 or Ryzen 7 and an RTX 4070-class card in a very small package. Second, it works great as a living room or HTPC — its 11L volume is smaller than most consoles, and the aluminum finish looks elegant on a TV stand. Third, it suits remote workers or creators who want a clean, space-saving desk setup without compromising on performance.

Things to Consider

The Mini-ITX-only requirement limits motherboard choices, and SFX power supplies are more expensive and less varied than ATX units. CPU cooler height is very restrictive at 55mm, so air cooling options are limited to low-profile models; a 240mm AIO is the better choice for higher-end CPUs. Cable management is tight, so a fully modular SFX PSU is highly recommended. Assembly requires patience and some experience with small form factor builds. ## Alternatives
A direct competitor is the Cooler Master NR200P, which offers more flexibility with ATX PSU support and larger cooler clearance, but at 18L it is significantly bigger. The Fractal Design Terra is another SFF option, but the A4-H20 has an edge with native 240mm AIO support. Choose the A4-H20 if absolute compactness and premium build quality are your priorities.

Product Disclosure (Amazon)

  • Manufacturer: Lian Li
  • ASIN: B09TB2NB5P
  • Note: This article covers a manufacturer-made product based on Amazon listing details.