Lian Li A3-mATX-26.3L Micro Form Factor Chassis-Flexible Power Supply Installation-No Fans Included-Supports 360mm AIO-Modularity Design-For M-ATX and ITX Motherboard-DAN Collaboration-Black (?A3X.US)
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AI Verdict
A 26.3L micro-ATX chassis with steel mesh panels, supporting 415mm GPUs and 360mm AIOs, for builders prioritizing compact size and component flexibility.
This 26.3L chassis is a strong fit for users aiming for a compact M-ATX or ITX build without sacrificing high-end component compatibility, like 415mm GPUs and 360mm AIOs. Its modular design and flexible PSU mounting options cater to custom configurations.
If you need more internal space for complex cooling setups or larger CPU air coolers, look for cases with volumes above 30L and CPU cooler clearance exceeding 170mm.
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Pros
- Accommodates 4-slot GPUs up to 415mm in length.
- Supports up to a 360mm radiator for liquid cooling.
- Flexible PSU installation for ATX, SFX, and SFX-L units up to 220mm.
- All exterior panels remove without tools, simplifying access for building.
- Steel mesh on side and top panels promotes airflow.
- Includes an anti-sag bracket for heavy graphics cards.
Cons
- No fans are included, requiring separate purchase for any active cooling.
- Installing 25mm thick bottom fans limits GPU thickness to 61mm (3-slot).
- Cable management space behind the motherboard tray is limited.
- Combining a bottom radiator and fans eliminates space for a GPU.
- Max CPU cooler height is 165mm, restricting some larger air coolers.
Dimension Scores
The 26.3L volume accommodates 415mm GPUs and 360mm AIOs, allowing for powerful components in a small footprint.
Since no fans are included, the noise level is entirely dependent on the user's fan and component choices.
Constructed from alloy steel with steel mesh panels, users report a feeling of superior build quality.
While modularity helps access, some users find the space for cable routing behind the motherboard tray to be limited.
Best For
- Builders needing a compact 26.3L chassis for M-ATX or ITX systems.
- Enthusiasts planning a custom liquid cooling loop with a 360mm AIO.
- Users with large 4-slot, 415mm graphics cards.
- Anyone who values toolless access for frequent component changes.
Not Recommended For
- First-time builders who expect pre-installed fans for immediate use.
- Users with CPU air coolers taller than 165mm.
- Builds requiring extensive cable routing space behind the motherboard tray.
- Systems where both a large GPU and bottom-mounted radiator/fans are essential.
Watch Out For
- Installing 25mm thick fans at the bottom reduces GPU clearance to 61mm, limiting it to a 3-slot GPU.
- If you mount a radiator and fan combo at the bottom, there's no space left for a GPU.
- The case ships without any cooling fans, so you'll need to buy at least one 120mm fan to start.
- Cable management on the back/right side of the case is tight, making routing difficult for some users.
Full Specifications
| ASIN | B0D5GYY364 |
| Brand | Lian Li |
| Color | Black |
| Series | A3X.US |
| Fan Size | 120 Millimeters |
| Material | Alloy Steel |
| Case Type | Mini-Tower |
| Model Name | A3X.US |
| Item Weight | 11.02 pounds |
| Manufacturer | Lian Li |
| Cooling Method | Air |
| Item model number | A3X.US |
| Product Dimensions | 17.4 x 7.6 x 12 inches |
| Item Dimensions LxWxH | 17.4 x 7.6 x 12 inches |
| Number of USB 2.0 Ports | 2 |
| Number of USB 3.0 Ports | 2 |
| Motherboard Compatability | Micro ATX and ITX |
| Power Supply Mounting Type | Frontways |
| Recommended Uses For Product | Gaming |
What Buyers Say
Many builders praise the case for its ease of assembly due to toolless panel removal and a highly modular interior, making it approachable even for those new to compact builds. The ability to fit large components like 415mm GPUs and 360mm AIOs in a 26.3L chassis is a recurring highlight. However, some users express frustration when trying to combine multiple large components, noting that compromises, particularly with bottom fan/radiator placement and GPU thickness, become necessary. The lack of included fans means an immediate additional purchase is required for any active cooling.
“Dude, this case is sick for how small it is, but seriously, they couldn't throw in like one fan? And trying to get all my cables neat was a nightmare, but my 4080 Super fits, so I guess it's fine.”
Common Praise
- Fits 4-slot GPUs up to 415mm without issue.
- Supports 360mm AIOs for high-performance cooling.
- All exterior panels remove without tools, simplifying component installation.
- Flexible PSU mounting options for ATX, SFX, and SFX-L units.
- Steel mesh panels on three sides provide ample airflow.
- Includes a USB-C port on the front I/O panel.
Common Complaints
- No fans are included, requiring separate purchases for cooling.
- Limited cable management space behind the motherboard tray.
- Bottom fan installation restricts GPU thickness to 61mm (3-slot).
- Installing a bottom radiator and fans leaves no room for a GPU.
- Can be frustrating to optimize cooling with large components simultaneously.
Ownership Tips
- You'll definitely need to budget for fans right away, as it ships completely bare.
- Planning your component layout, especially with a 360mm AIO and a large GPU, is crucial to avoid clearance issues.
- The modularity is a lifesaver for upgrades or troubleshooting, making it easy to get inside.
- Expect to spend extra time on cable management if you want a clean interior.
- The steel mesh panels are effective for airflow but can let dust in without proper filtration.
Frequently Asked Questions
Does this case come with any fans?
No, the Lian Li A3-mATX does not include any fans, so you will need to purchase them separately for cooling.
What size graphics cards can fit in this case?
It supports 4-slot graphics cards up to 415mm in length.
Can I use a large ATX power supply?
Yes, it supports ATX, SFX, and SFX-L power supplies up to 220mm in length, with flexible mounting options.
What kind of liquid cooling does it support?
The chassis supports up to a 360mm radiator for liquid cooling setups.
Is there a USB-C port on the front panel?
Yes, the front panel includes one USB 3.1 Type-C port, along with two USB 3.0 Type-A ports and audio jacks.
What is the maximum CPU cooler height?
The maximum CPU cooler height supported is 165mm.
Buying Guide
When picking a micro-ATX case like this, you're balancing size with component compatibility. You need to think about your GPU's length and thickness, your CPU cooler's height, and whether you want air or liquid cooling. Since this one comes with no fans, you'll immediately need to decide on your cooling strategy and budget for those.
26.3L Micro Form Factor
This number tells you the case's total volume. For comparison, a shoebox is roughly 10-15L, while a typical mid-tower is 40-50L. This case is on the smaller side for micro-ATX, meaning it saves desk space but requires careful component selection.
415mm GPU Support
This is the maximum length of a graphics card you can fit. Many high-end GPUs are very long, so knowing this number ensures your expensive card won't be too big for the case.
360mm AIO Support
This refers to the size of an all-in-one liquid CPU cooler. A 360mm AIO uses three 120mm fans and a large radiator, offering powerful cooling for hot CPUs, but it takes up significant internal space.
Flexible PSU Installation
This means you can mount your power supply in different orientations or locations within the case. This flexibility is key in compact cases to make room for other large components or to improve airflow.
Alternatives
If you need more room for multiple radiators, larger CPU air coolers, or easier cable management without compromises, look for micro-ATX cases with volumes above 30-35L and CPU cooler clearance over 170mm.
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