The Corsair 4000D Airflow wins in 7 out of 8 comparable specs. Its biggest advantage is Max Cooler Height (209% better).
A4-H2O wins in 1 spec (2.5" Bays: 50% better).
Recommendation
Choose 4000D Airflow if you want the best overall performance — especially max cooler height.
Choose A4-H2O if 2.5" bays matters more to you.
| Spec | Corsair4000D Airflow | Lian LiA4-H2O |
|---|---|---|
| Design | ||
| Type | ATX Mid Tower | Mini ITX |
| Side Panel | Tempered Glass | Tempered Glass |
| Weight | 7.8 | 3.5 |
| Compatibility | ||
| Max GPU Length | 360 mm+12% | 322 mm |
| Max Cooler Height | 170 mm+209% | 55 mm |
| Max PSU Length | 200 mm+54% | 130 mm |
| Max Radiator |
| 360 mm+50% |
| 240 mm |
| Motherboard Support | ATX, Micro ATX, Mini ITX | Mini ITX |
| Cooling | ||
| Included Fans | 2+100% | 0 |
| Storage | ||
| 2.5" Bays | 2 | 3+50% |
| 3.5" Bays | 2+100% | 0 |
| I/O | ||
| Front I/O | 1x USB-C, 1x USB-A 3.0, Audio | 1x USB-C, 1x USB-A 3.0 |
| Price | ||
| MSRP | $105−19% | $130 |
| Release Date | Sep 2020 | Jan 2022 |
