Lian Li A4-H2O Small Case - Mini ITX - Aluminum Exterior & SPCC Steel Interior - PCIe 4.0 - Easy AIO Installation - Supports SFX/SFX-L Power Supply (A4-H2O A4 SILVER)
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Availability:
Only 2 left in stock, order soon!
Arrives
Wednesday, Apr 29
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Style: A4-H2O ITX Silver
Features
- 11-liter small form factor case with a sandwich design layout
- Supports triple-slot GPU and clearance for 240 AIO water cooling.
- Fully removable panels allows for easier access for installation and/or cable management.
- Supports SFX, SFX-L Power Supply and Mini- ITX
- AIO water cooling support
- A DAN collaboration case
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: Silver
Material: Aluminum
Power Supply Mounting Type: Bottom Mount
Cooling Method: Air
Model Name: A4-H2O A4 SILVER
Item Weight: 2.9 Kilograms
Supported Motherboard: Mini ITX
Case Type: Mini-Tower
Power Supply Mounting Type: Bottom Mount
Cooling Method: Air
Total Expansion Slots Quantity: 3
Total USB 3.0 Ports: 1
Total Usb Ports: 2
Hard Disk Form Factor: 3.5 Inches
Internal Bays Quantity: 1
Compatible Devices: Mini-ITX
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
Brand: Lian Li
Model Name: A4-H2O A4 SILVER
Manufacturer: LIAN LI
Global Trade Identification Number: 03
Warranty Description: 1 year
Color: Silver
Enclosure Material: Aluminum
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.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Style: A4-H2O ITX Silver
Out of all the ITX cases I have used this one is the best my Gigabyte 3080Ti fit within a scant millimeter but did fit. The thermals were much better than I was expecting to with two 120mm fans rigged for exhaust on the top there was no problem with hot air building up in the case as I thought might be a problem luckily this case did not turn into a hot box like some builds I did. I used a 47mm all copper cooler for the 5700X3D and gaming temps were in the mid to high 50’s C and the GPU ran in the low to mid 70’s C. Cable management is ok. The Build construction is really solid the panels snap in easily. The only con is the case is a little pricey but you definitely get what you pay for. I would definitely use a 240 AIO in the future in this build as the CPU fan can get a little noisy at high RPM and the exhaust fans would be an inch closer to the MOB and GPU and thermals would probably be a little better.
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Reviewed in the United States on February 21, 2025 by Tommy
Style: A4-H2O ITX Silver
Love this little case. I watched the Optimum Tech video where he found a way to watercool a CPU and GPU in this tiny ITX case and decided to replicate it. I was able to cram a 240 radiator, a XPSC 240 radiator on the side, a 4090, and a i7 14th gen, with Modultra pump/waterblock. This thing is a solid brick but my temps never get above 10c over ambient, and I can pack it in a carryon suitcase to take with me when I travel. The inlcuded instructions are easy to understand, but there's not much to this case either. And lets be honest, if you're building a SFF PC, you've likely not new to PC building. If you are a newbie, do yourself a favor and get an ATX case. This is not a case for beginners, and I wouldn't recommend this case to most people I know for that reason. However, this is one of the smallest form factors you can get that supports a 240mm radiator. While you don't have to go crazy and cram 2 radiators in it, you can fit an AIO in no problems.
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Reviewed in the United States on February 11, 2025 by Dan
Style: A4-H2O ITX Silver
Excellent case overall it has a premium feel to it and it is easy to build in if you put some time in choosing your PC parts as for cooling it can fit a 240 AIO in this SFF is nice but be mindful what AIO you use I went with a thermalright frozen magik and even tho it fit and look very nice performance for my R7 7800X3D was around 75-80C while gaming SO I replace this for a Cooler master atmos stealth and temps are better now 60-70C barely reaches 80 under full load cinebench. Im guessing this case really needs good fans to pull air as it only 2 exhaust fans doing all the work so u better get the best ones on the market. ASUS Prime line up gpu fits really well here I went with a RTX 5070 TI it looks fire plus riser 4 cable included in the price, it works as intended with my ASUS B650E-I motherboard.
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Reviewed in the United States on August 11, 2025 by Joel
Style: A4-H2O ITX Silver
I swapped all my parts from the pictured NZXT H210, and the build process was simple and stress free. I was starting to grow out of my old case, as I wanted something less obtrusive to take advantage of what ITX can really do. Since I didn't get custom cables, the stock PSU cables were quite rigid but luckily all the panels on the entire case are removable (and believe me, you're gonna have to remove them all). What really drew me to this case in particular is the price compared to the much more expensive FormD T1 and even the regular A4-SFX. But beyond that, I mainly liked how this case is simple without any obstructive lights or branding. This case is beautiful just by the fact that it doesn't draw attention to itself, which goes an extra step further since none of my components inside it have any RGB either. Now for the part that really blew me away was the temps. This shouldn't be surprising because the NZXT H210 is notorious for being an oven, but somehow I was expecting such a small case like this one to run hot as well. GPU temps dropped by more than 10 degrees across the board. Full load previously was 84C but has been reduced to 72C now. For my normal usage (60-75%) the GPU stays around 64C. Compared to the H210, the noise level is much quieter and the GPU is no longer screaming for its life. Another thing I like is how the GPU is on the right side of the case. Most other sandwich layouts I've seen have it on the left, but since I put my PC on the right of my desk this means the loudest part will be facing away from me. Overall, a great experience as a first time builder in a case this small. Lian Li has proven to be extremely high quality especially for this price point, and I like having the option to go liquid cooling later down the line next time I upgrade my PC again. I'm glad to be a member of the SFF PC community now with this case. Edit: Took off 1 star due to riser cable issues. Got a new GPU today, found out that it wouldn't work properly unless I set the PCIe setting to 3.0 despite the case saying it supports 4.0. Not that big of a deal since realistically it makes no difference while gaming, but it is a bit misleading in this scenario.
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Reviewed in the United States on July 12, 2023 by natecolena
Style: A4-H2O ITX Silver
The case is meant for one, maybe 2 configurations at most so make sure you check the details and specs to see if your parts fit. Quality is pretty good. The only thing I'd say is a con is that the exterior panels feel slightly cheap, mostly because of the finish. Overall: A bit expensive Looks great Works great as long as you make sure your components fit Performance depends on your parts but it shouldn't impede performance. Assembly is simple and instructions are easy to follow. Make sure to plug in eps connector before installing your aio.
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Reviewed in the United States on September 26, 2024 by michael miramontes
Style: A4-H2O ITX Silver
Great wonderful case, I wish the panels were a little bit sturdier so that gaps wouldn’t exist. But oh well, I can’t have a formd t1 for %50 more even if I could afford one and this makes me happy so that’s all that matters. Remove the front panel to shove in your gpu and you’ll have a blast. Great amount of space, easy to work in, and it fits a Thermalright frozen edge 240 cooler perfectly.
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Reviewed in the United States on July 28, 2025 by Sam