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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At a glance
- Condition
- New
- Style
- A4-H2O ITX Silver
- Model
- A4-H2O A4 SILVER
- Dimensions
- 12.83"D x 9.61"W x 5.51"H
- Weight
- 2.9 kg
- Color
- Silver
- Material
- Aluminum
- Warranty
- 1 year
- Works with
- Mini-ITX
Features 6
- 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
Specs 24
| 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 | Water |
| Model Name | A4-H2O A4 SILVER |
| Item Weight | 2.9 kg |
| Supported Motherboard | Mini ITX |
| 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 |
| Enclosure Material | Aluminum |
| Item Dimensions D x W x H | 12.83"D x 9.61"W x 5.51"H |
| Number of Items | 1 |
| Manufacturer | LIAN LI |
| Global Trade Identification Number | 03 |
| Model Number | A4-H2O A4 SILVER |
| Mfr Part Number | A4-H2O A4 SILVER |
| Antenna Location | Gaming |
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To initiate a return, please visit our Returns Center.
View our full returns policy here.
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The Best ITX case The Best ITX case
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 Reviewed in the United States on February 21, 2025 by Tommy
amazing case, very portable amazing case, very portable
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 Reviewed in the United States on February 11, 2025 by Dan
GREAT SFF CASE
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
Great temps and easy to build Great temps and easy to build
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 Reviewed in the United States on July 12, 2023 by natecolena
Solid case
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
Good case :)
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
It can fit 3.25 slot GPUs! It can fit 3.25 slot GPUs!
Style: A4-H2O ITX Silver
I was looking around at mini-ITX case options for my new build and found this absolute gem. The ability to have a 240mm AIO in a system this small is amazing and is great for getting heat out of the system. Now, I was worried about my GPU clearance as Lian Li states this case supports a MAX of 3 slot wide GPU. Well, my ASUS TUF RTX 4070ti Super is a 3.25 slot GPU so I was fully prepared to replace it with something smaller. Out of curiosity I did dry fit it and it fit. I got my system together and with a few millimeters to spare my 3.25 slot GPU fit! You're best off to go SFX on power supply. Don't bother with SFX-L unless you have custom cables. Space in this case is limited. Build quality is what one would expect from Lian Li and airflow is pretty good. My CPU will hit the low 80s while gaming with the GPU sitting at around 72C. I did go fairly cheap on my 240mm AIO, so I do not believe this to be the fault of the case. I am genuinely very happy with this little beast of a case. Would recommend to anyone looking into an ITX build. Zip ties are your best friend ;) For those curious: CPU: Ultra 7 265 (non-K, I wanted the lower TDP for this build) GPU: ASUS TUF RTX 4070ti Super RAM: Crucial Pro DDR5 6000MHz MOBO: ASUS ROG Strix B860-I Gaming WiFi PSU: Thermaltake Toughpower SFX 850W 80Plus Platinum Cooler: ID-COOLING FX240 PRO
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Reviewed in the United States on July 2, 2025 Reviewed in the United States on July 2, 2025 by Austin W.
The riser cable was the issue
Style: A4-H2O ITX Silver
The riser cable included in this case is like a plague. It will give your computer all kinds of issues. It may work fine at fist but it will at some point cause issues with your computer. I've never experienced such weird set of issues in my life on a PC I built. All because this cheap company decided to be cheap on the cheap riser cable. On a cable dude. Li, get your together. Don't include trash with your case. This case should cost no more than $70. There is zero value to this case given the amount of issues it gave me. I'd return this turd if I could but I waited too long. This is expert level case, it has zero ease of use. It would weight less if Li didn't include the trash riser cable, so it's very heavy.
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Reviewed in the United States on February 13, 2026 by Jconn