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Lian Li

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)

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Availability: In Stock.
Fulfilled by Amazon
Arrives Wednesday, Apr 29
Order within 7 hours and 13 minutes
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Style: A4-H2O ITX Black


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.

Description

The A4-H2O is an 11-liter small form factor case, a collaboration project with DAN Cases. Based on the original DAN A4-SFX case sandwich layout concept, the A4-H2O continues the minimalist and compact form factor with improved hardware compatibility (including AIO water cooling) and simplifies installation

Brand: Lian Li


Motherboard Compatability: Mini ITX


Case Type: Mini-Tower


Recommended Uses For Product: Gaming


Color: Black


Material: Aluminum, SPCC Steel


Power Supply Mounting Type: Bottom Mount


Cooling Method: Water


Model Name: A4-H2O X4 BLACK


Fan Size: 120 Millimeters


Supported Motherboard: Mini ITX


Case Type: Mini-Tower


Power Supply Mounting Type: Bottom Mount


Cooling Method: Water


Light Color: Blue


Fan Size: 120 Millimeters


Total Expansion Slots Quantity: 3


Total USB 3.0 Ports: 1


Total Usb Ports: 2


Other Special Features of the Product: Sandwich Design Layout, AIO Water Cooling Support, DAN Collaboration Case


Hard Disk Form Factor: 3.5 Inches


Internal Bays Quantity: 1


Compatible Devices: Mini-ITX


Number of Fans: 2


Power Supply Maximum Output: 600 Watts


Brand: Lian Li


Model Name: A4-H2O X4 BLACK


Manufacturer: LIAN LI


Global Trade Identification Number: 97


Warranty Description: 1 year


Color: Black


Enclosure Material: Aluminum, SPCC Steel


Antenna Location: Gaming


Item Weight: 2.9 Kilograms


Item Dimensions D x W x H: 12.83"D x 9.61"W x 5.51"H


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, Apr 29

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews

    • 11-Liter SFF Hall of Famer
Style: A4-H2O ITX Black
Review Image by Jefffahfah
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. ... show more
Reviewed in the United States on April 2, 2023 by Jefffahfah
    • Perfect Case
Style: A4-H2O ITX Black
It's the perfect case for my needs: - Small even for SFF standards. - Quality materials. - Decent cooling options given the space you have. - Fits a pretty big GPU. - Supports air cooling if you pick the right size. Extra Notes: - I'm undervolting my 7700X and the fans are inaudible during day to day use, but do get a high quality fan if you go with air cooling. - Cable management is the trickiest part, as others have said. It's best if you pick a PSU that is known to work well with the stock cables it comes with or get custom cables. - It was easier to build in than my last mATX case, simply because you are more limited to parts and compatibility, but you must do research to build in this case. Do not just throw seemingly compatible parts in your Amazon cart. Validate that someone has built successfully with those parts first. ... show more
Reviewed in the United States on November 15, 2024 by Rory Willis
    • Excellent ITX case, thermals better than expected, this is an amazing ITX case.
Style: A4-H2O ITX Black
This is now the best case I have ever owned. Super small, quiet, aesthetically pleasing, well built. Thermals (and noise - Noctua fans...) are better than you would expect with such a cramped case. This case is also surprisingly quiet. Get custom cables if you can, this will aid with cable management. Modular PSU's are a must with this case, non modular PSU's will not work as there is not enough room for spare cables. This case replaces my excellent Corsair 250D that is large for a ITX case but has excellent thermals. This machine is used for gaming on a 2K monitor. Easy to build as all of the panels are removable. CPU: Intel Core i5 13600K (not overclocked) never gets above 55-62C (better cable management or custom cables would probably improve this to drop below 60C) CPU Cooler: NZXT Kraken X52 (long hoses but they fit fine) with 2 Noctua 120mm x 25MM fans pushing out and 1 120mmx15mm slim Noctua fan on the bottom pulling air in. This fan is not mounted as there is not a mount in this spot however, it works fine and does not move at all. GPU: RTX 4070FE - (not overclocked) Stays at 70C or below. Very quiet. PSU: 850watt Cooler Master fully modular SFF 2 M.2 drives, no 2.5 SSD, don't need them anymore. ... show more
Reviewed in the United States on May 25, 2023 by Ceeg
    • Great choice for me!
Style: A4-H2O ITX Black
I really like this case. Built in it with a 3070ti, coolermaster 240 atmos, and asus b650e-i and i'm pretty happy with it. There were some challenges relating to the cooler and the corsair sf850 psu- the hose routing had a tendency to lay against the power switch and bumping my table could cause a power flicker. I had to get creative with some zip ties to hold the tubes well away from the switch but that has been the only real challenge with the build. *Maybe* the rear io cutouts are a bit tight, seems like i could do with another 1-2mm of clearance around my gpu connections. Looks great on the table and thermals are pretty good for a system this size. ... show more
Reviewed in the United States on May 11, 2025 by patrick a.

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