The Lian Li Lancool III wins in 7 out of 8 comparable specs. Its biggest advantage is Max Cooler Height (227% better).
A4-H2O wins in 1 spec (MSRP: 13% better).
Recommendation
Choose Lancool III if you want the best overall performance — especially max cooler height.
Choose A4-H2O if msrp matters more to you.
| Spec | Lian LiA4-H2O | Lian LiLancool III |
|---|---|---|
| Design | ||
| Type | Mini ITX | ATX Mid Tower |
| Side Panel | Tempered Glass | Tempered Glass |
| Weight | 3.5 | 12.2 |
| Compatibility | ||
| Max GPU Length | 322 mm | 435 mm+35% |
| Max Cooler Height | 55 mm | 180 mm+227% |
| Max PSU Length | 130 mm | 220 mm+69% |
| Max Radiator |
| 240 mm |
| 420 mm+75% |
| Motherboard Support | Mini ITX | ATX, EATX, Micro ATX, Mini ITX |
| Cooling | ||
| Included Fans | 0 | 4+100% |
| Storage | ||
| 2.5" Bays | 3 | 8+167% |
| 3.5" Bays | 0 | 4+100% |
| I/O | ||
| Front I/O | 1x USB-C, 1x USB-A 3.0 | 1x USB-C, 2x USB-A 3.0, Audio |
| Price | ||
| MSRP | $130−13% | $150 |
| Release Date | Jan 2022 | Jul 2022 |
