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🔥 Compact power, cool style — your ultimate mini ITX game changer!
The Lian Li A4-H2O is an 11-liter Mini-ITX PC case engineered for high-end components, featuring triple-slot GPU support with PCIe 4.0 riser, advanced cooling with 240mm radiator compatibility, and modular mesh aluminum panels for superior airflow and easy maintenance—all wrapped in a premium silver aluminum chassis.






| ASIN | B09T74VNYS |
| Antenna Location | Gaming |
| Best Sellers Rank | 69,980 in Computers & Accessories ( See Top 100 in Computers & Accessories ) 605 in Computer Cases |
| Brand Name | Lian Li |
| Case Type | Mini-Tower |
| Colour | Silver |
| Compatible Devices | Mini-ITX motherboards, Nvidia Founders Edition 30 series GPUs, 240mm AIO liquid cooling systems |
| Cooling Method | Water |
| Customer Reviews | 4.6 4.6 out of 5 stars (404) |
| Enclosure Material | Aluminium |
| Global Trade Identification Number | 04718466011503 |
| Hard Disk Form Factor | 3.5 Inches |
| Internal Bays Quantity | 1 |
| Item Dimensions D x W x H | 39.4D x 19.1W x 30.5H centimetres |
| Item Weight | 2.9 Kilograms |
| Manufacturer | LIAN LI |
| Model Name | A4-H2O |
| Other Special Features of the Product | AIO water cooling support, collaboration project with DAN Cases, USB 3.1 Type-C port, and PCIe Gen.3 or PCIe Gen. 4 riser cable included |
| Power Supply Mounting Type | Bottom Mount |
| Product Warranty | 2 year manufacturer |
| Supported Motherboard | Mini ITX |
| Total Expansion Slots Quantity | 3 |
| Total USB 3.0 Ports | 1 |
| Total USB Ports | 2 |
K**N
A little bit discrepancy regarding the gpu tall
It's not quite straight, the pci slot in the case allows the gpu to be a little uneven compared to the slots on the side of the case.
G**.
Wünsch ein absolut tolles und kompaktes Gehäuse.
S**A
I cannot tell how good The case is. Looks premium and can fit large 3080ti perfectly. I have build it with low profile air cooler as I didn’t want to use AIO. The temps are really good and u am having no issues at all. Most importantly you can fit it in a backpack. Portability is awesome.
J**H
This case is absolutely amazing, punching well above its weight class. Let's start off with what I have inside mine -- an i7 12700K and am RTX 3090 TUF, powered by a Cooler Master V850 SFX PSU. Man, does this case make it happen. The H2O is able to handle this kind of power because the CPU is liquid-cooled, and the GPU sits on the other side of this sandwich style case. The case itself is rock solid, utilizing a near tool-less snap-together design and plenty of ventilation for its size. It is larger than the previous model (Dan A4 SFX), due to the intention of this being water-cooled. I opted for an MSI CoreLiquid 240R ARGB V2, since the water block is small and offers ARGB. It tames the temps well on my 12700K. You'll need to make sure your AIO will fit in this case, as there are many that won't -- either because the pump/water block is too tall or because the hoses are too thick. You'll also want something that has hoses on swivel elbows. Otherwise, routing the hoses and closing this case will be next to impossible. This was hands-down the hardest aspect of building in this case -- managing the AIO hoses. The A4-H2O gets a lot right. You can cool some higher end CPUs, use a full length GPU, and a semi-pleasant building experience. To top it off, it looks amazing, and the parts are high quality. Just keep your hands off the case, as the finish shows off fingerprints well. This case is an excellent competitor for the NR200, because it's 8 liters smaller, and has nearly all-metal construction. To me this one is the obvious choice. Also in this form factor I would avoid i9 CPUs entirely. They eat up too much power, and make too much heat. My experience with this case has been fantastic, but it did leave me wanting more. Having a liquid-cooled, 11.24-liter PC means it's going to be a tad heavy. It's also too big to fit into my DSLR camera bag. I also think this case's width dimension would be a tight fit in a carry on-size tough case like one from Pelican. If you need a small form factor PC for saving desk space, this is an excellent option. That's the niche this serves for me, and it delivers. Maybe you can make this a portable powerhouse for more than gaming. Its too big and heavy for me. Personally, I've found my 8.1-liter KXRORS S300 case to be a better road warrior, because it fits in my DSLR bag and weighs less. Sure, that one can't be as powerful, but it games very well, albeit a little louder.
M**.
Le maître mot : compact ! De bonne qualité et montage facilité par son ergonomie. J'utilise une 4080 super MSI Ventus 3xc (seul modèle avec la Founder à être compatible avec ce boitier) Au top de la puissance, tout en silence. Posé sur le coin du bureau il en jette par sa sobriété. Très pratique pour le transport ou je frime devant les potes avec un boitier plus compact que leur console de salon. Je le connecte à un écran externe. J'utilise le cloud gaming désormais mais pour quelqu'un qui préfère avoir son propre support c'est le graal du boitier. Pour des raisons d'économie et de respect environnementale ça devrait selon moi devenir une norme chez les gameurs... Je recommande sans hésiter.
B**N
The design of this case is top tier for SFF cases in terms of compatibility and effective use of space. Good fit and finish as well for the price, although the esthetics could be a bit better as the simple rectangular shape is too simple for me. Easily housing a 7800X3D and 5070 Ti system for me. Love this form factor on my desk.
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