Best Smallest MATX Cases

InWin CJ712 mATX (8 Liters)

SPECIFICATIONS

Motherboard: Micro ATX, Mini-ITX | Dimensions: 15.67 x 8.19 x 17.32 inches | Included Case Fans: 3x 120mm ARGB (1000RPM) | GPU Length: 350mm | CPU Cooler Height: 155mm | Liquid Cooling Support: 1x 280mm, 1x 120mm |

The InWin CJ712 truly earns its place as the smallest Micro-ATX case for what it achieves, because fitting a full Micro-ATX motherboard into an 8-liter chassis is no small engineering feat. This is about as compact as mATX gets before you are pushed into Mini-ITX pricing and limitations. The case is aimed at users who want maximum board compatibility in the smallest possible footprint, making it ideal for tight desks, office setups, or discreet systems that quietly disappear into the background. The included 265W built-in power supply is well matched for its role, easily handling office workloads, home servers, or light workstation tasks without wasting space or money.

Design choices here are practical rather than flashy, and that is exactly the point. The slim steel frame supports both vertical and horizontal placement, while the tool-less drive cage makes installing storage far easier than expected in a case this small. There is even support for a slim optical drive or front card reader, a feature nearly extinct in modern cases but still genuinely useful for business and archival work. Cooling is basic but functional, although the front 80mm fan can be noisy and is worth replacing if a quiet environment matters to you.

This is not a gaming case, and it does not pretend to be one. Because it is so slim, you are limited to low-profile graphics cards and CPU coolers under 45mm in height. The CJ712 shines as a reliable platform for productivity systems, servers, labs, or clean office builds where space efficiency matters more than raw power. For builders who want the smallest true mATX case possible without paying ITX premiums or sacrificing motherboard features, the InWin CJ712 stands as a rare, focused solution that knows exactly what it is meant to do.

If you’re into ATX cases, see our best smallest ATX cases.

InWin BL040 mATX (11.5 Liters)

SPECIFICATIONS

Motherboard: Micro ATX, Mini-ITX | Dimensions: 15.39 x 9.06 x 15 inches | Included Case Fans: 1x 120mm | GPU Length: 360mm | CPU Cooler Height: 159mm | Liquid Cooling Support: 1x 240mm, 1x 120mm |

After the InWin CJ712, with its ultra-tight 8-liter footprint, the next spot naturally goes to the InWin BL040. At 11.5 liters, it is still incredibly small for a Micro-ATX case and stands as one of the most compact mATX towers you can realistically build in today. It does not look cramped or awkward, either. The design is clean and modern, and at a glance it blends in like a normal desktop rather than shouting that it is a tiny system.

What makes the BL040 impressive is how much it fits into that limited space. It supports standard Micro-ATX motherboards, not cut-down or proprietary layouts, and still leaves room for a full-length GPU, within reasonable size limits for a case this small. That flexibility is rare at this volume and gives builders far more options than most compact cases allow. It feels like a thoughtful step up from ultra-slim designs, offering a better balance between size, compatibility, and everyday usability.

Building inside the BL040 feels surprisingly approachable for such a small chassis. InWin has arranged the internal layout to let cables route cleanly and components fit without unnecessary wrestling. Ventilation is handled by well-placed vents and optional small fans, and although you won’t fit monster coolers, there’s enough clearance for effective air or compact AIO liquid cooling options. Storage support typically includes mounts for multiple 2.5-inch drives, which keeps the overall profile slim but still useful for everyday and performance-oriented systems.

In everyday use, the BL040 shines as a compact desktop or living room PC that doesn’t compromise on performance potential. Thermals remain reasonable when you choose parts with size and heat in mind, and the overall build feels sturdy despite the tiny chassis. The trade-off for this size is obvious, you have to be mindful of component lengths and cooling choices. but for anyone who wants a powerful PC in an exceptionally small, attractive Mini-ATX case, the InWin BL040 makes a very compelling option.

Want to know more compact cases, see our reviewed, best portable PC cases.

SSUPD Meshroom S V2 (14.9 Liters)

SPECIFICATIONS

Motherboard: Micro ATX, Mini-ITX | Dimensions: 15.4 x 8.1 x 15 inches | Included Case Fans: 1x 120mm | GPU Length: 350mm (13.78″) | CPU Cooler Height: 155mm | Liquid Cooling Support: 1x 280mm, 1x 120mm |

The SSUPD Meshroom S V2 is a masterclass in space efficiency, packing a full Micro ATX layout into a vertical tower that occupies just 14.9 liters of volume. It is essentially a mesh rectangle that sits tall on your desk, taking up very little surface area while allowing air to flow freely through every panel. This revised version fixes the minor clearance issues of the original, providing just enough extra room to fit massive four slot graphics cards that would usually require a much larger case. It is a rare find for those who want the power of a standard PC without the bulky footprint of a traditional mid tower.

One of the most practical benefits here is the incredible flexibility of the internal layout. While most small cases force you to compromise on parts, this one lets you keep your Micro ATX board and even fits a standard ATX power supply if you plan your cable routing carefully. The vertical sandwich design separates the heat from your processor and graphics card, meaning they aren’t blowing hot air directly onto each other. This is a huge win for long term stability, especially since you can mount a 280mm liquid cooler right against the front mesh to keep high end chips running cool and quiet.

The real legendary status comes from how much utility is tucked into such a tiny frame. It features a modern front I/O with a fast USB-C port and tool less panels that pop off easily when you need to swap a drive or clean out some dust. Because it stands upright, it acts more like a piece of desk furniture than a heavy computer box, leaving you plenty of room for your mouse and keyboard. It is a smart choice for anyone who needs a high performance machine but refuses to let a giant plastic tower take over their entire workspace.

For more cool cases, check our review on best PC cases for watercooling.

JONSBO C6 (15.9 Liters)

SPECIFICATIONS

Motherboard: Micro ATX, Mini-ITX | Dimensions: 13.2 x 12.6 x 16.7 inch | Included Case Fans: 1x 200mm | GPU Length: 350mm (13.78″) | CPU Cooler Height: 185mm | Liquid Cooling Support: 1x 240mm front, 2x 280mm top and side |

Finding a way to squeeze a full Micro ATX motherboard into a frame that is barely larger than two shoe boxes is exactly what makes the Jonsbo C6 a favorite for space savers. At 15.9 liters, it is physically smaller than many cases designed only for tiny ITX boards, yet it lets you keep your more affordable and feature rich mATX hardware. The entire exterior is wrapped in fine steel mesh panels that snap off without any tools, making the initial build and future cleaning much less of a headache than the typical cramped small form factor experience.

One of the most practical benefits is the clever internal layout that supports a standard ATX power supply, though using a smaller SFX unit is a pro tip for keeping the clutter down. Even with its tiny footprint, you can mount 120mm or 140mm fans at the top and bottom to create a chimney effect that pulls cool air straight through your components. It is surprisingly versatile for its size, offering enough room for a dual fan graphics card up to 255mm and even a spot for a front intake fan or extra storage drives if you need them.

This case achieves what many thought was impossible by offering a genuine path to a high performance desktop that takes up almost no desk space. While you have to be mindful of the 75mm CPU cooler height limit, it is the perfect shell for a powerful 2026 productivity station or a mid range gaming rig. It feels solid and intentional, providing a modern USB-C port on the front and a clean, minimalist look that blends into a professional office or a home setup. For anyone looking to shrink their PC without the high cost of specialized parts, this 15.9 liter cube is a reliable and smart solution.

Mechanic Master C28 (17.9 Liters)

SPECIFICATIONS

Motherboard: Micro ATX, Mini-ITX | Dimensions: 20.5 x 17 x 11.2 inches | Included Case Fans: 1x 120mm | GPU Length: 338mm | CPU Cooler Height: 170mm | Liquid Cooling Support: 1x 360mm top, 1x 120mm rear |

Packing a high-end setup into the Mechanic Master C28 feels like a reward for anyone tired of oversized plastic towers. At exactly 17.9 liters, this aluminum “Cool Cube” is a precision-engineered shell that manages to swallow a full Micro ATX motherboard without wasting a single millimeter of desk space. It is noticeably smaller than most of its competition, sitting right at that sweet spot where portability meets raw power. The built-in top handle is not just a gimmick; it is a solid, CNC-machined part that makes moving your entire workstation as easy as carrying a small briefcase.

The internal frame adapts to your specific hardware needs. You have the rare choice of fitting a massive 162mm tall air cooler if you prefer a traditional silent build, or you can swap to a 240mm liquid cooler if you are pushing a high-performance chip to its limits. Because the exterior panels are made of 2mm thick aluminum alloy, the case itself acts as a massive heat sink, helping to pull residual warmth away from your components. It also fits full-length graphics cards up to 335mm, which means you can run a triple-fan card in a chassis that is roughly half the size of a standard mid-tower.

Building in this 17.9 liter horizon requires a bit of patience due to its “Screw Master” reputation, but the result is an incredibly sturdy and dense machine. The tempered glass side panel gives you a clear view of your work, while the modular brackets let you move the power supply around to clear room for extra storage or fans. It achieves a level of craftsmanship that makes it look more like a piece of high-end audio equipment than a typical computer. For the builder who wants a unique, industrial aesthetic that saves a massive amount of space without sacrificing motherboard features, the C28 is a genuine legendary find.

To outlast any tower PC case see our review of the best horizontal PC cases.

JONSBO JONSPLUS Z20 (20.3 Liters)

SPECIFICATIONS

Motherboard: Micro ATX, Mini-ITX | Dimensions: 9.8 x 15.9 x 14.1inches | Included Case Fans: 1x 120mm, 1x 60mm | GPU Length: 338mm | CPU Cooler Height: 170mm | Liquid Cooling Support: 1x 360mm top, 1x 120mm rear |

To build a high performance machine without the massive footprint of a standard tower is exactly what the Jonsplus Z20 was made for. At just 20.3 liters, it sits in that rare category where it is small enough to feel like a boutique mini ITX build, yet it actually fits a more affordable and powerful Micro ATX motherboard. The construction is noticeably premium, using thick steel and a clever mesh design that looks more like a high end piece of furniture than a computer box. It solves the biggest frustration for space savers by offering a detachable handle and enough internal height to fit a massive air cooler or a 240mm liquid radiator, which usually requires a much larger chassis.

The real beauty of this case is how it refuses to compromise on hardware compatibility despite its tiny size. You can slide in a full length graphics card up to 363mm, meaning the latest triple fan cards will fit comfortably without hitting the front of the frame. Because the entire body is wrapped in a square mesh pattern, the airflow is direct and immediate, keeping your parts cool even when you are pushing them hard. It feels like a solid, industrial grade tool that values utility and craftsmanship, providing a modern USB-C port and enough flexibility to move the power supply around to clear extra space. For anyone who wants a compact desk but still needs the raw power of a full sized desktop, this 20 liter champion is a legendary choice.

For more inverted layout chassis, see our list of the best inverted PC cases.

Silverstone Technology PS15 Pro (25.7 Liters)

SPECIFICATIONS

Motherboard: Micro ATX, Mini-ITX | Dimensions: 11.81 x 2.03 x 5 inches | Included Case Fans: 2x 120mm | GPU Length: 350mm | CPU Cooler Height: 160mm | Liquid Cooling Support: 2x 280mm top and front |

Building with the Silverstone PS15 Pro feels a lot like working on a reliable car from the eighties. It is a no nonsense, mechanical experience that prioritizes function over fancy gimmicks. At 25.7 liters, it manages to be remarkably compact for a tower that fits a full Micro ATX motherboard and a standard ATX power supply. The simple, clean lines and the full mesh front panel aren’t just for show. They create a direct path for air to move through your components, which is a massive win for anyone worried about parts getting too hot in a small space.

This case hits a sweet spot for practical space saving because it uses a traditional layout that most builders are already comfortable with. You get the benefit of a small footprint without the headache of proprietary parts or strange cable routing. The Pro version comes with a few pre installed fans and a tempered glass side panel, giving it just enough modern flair while keeping the core focus on utility. It fits graphics cards up to 314mm and standard air coolers, making it a solid choice for a high performance daily driver that won’t take over your entire desk.

What makes this model a legendary pick is how it handles the basics. The magnetic dust filters are easy to pop off for a quick cleaning, and the interior is open enough to allow for easy hardware swaps. You aren’t fighting against plastic shrouds or unnecessary dividers here. It is a straightforward steel box that does exactly what you need it to do. For the person who values a small, functional setup that is easy to maintain and customize manually, the 25.7 liter PS15 Pro is a practical champion that stays out of your way.

SAMA IM01 Pro (26.1 Liters)

SPECIFICATIONS

Motherboard: Micro ATX, Mini-ITX | Dimensions: 16.54 x 9 x 15.35 inches | Included Case Fans: 5x 120mm ARGB | GPU Length: 340mm | CPU Cooler Height: 180mm | Liquid Cooling Support: 1x 280mm, 1x 240mm |

Building in the SAMA IM01 Pro feels like rediscovering a secret that the more mainstream brands have overlooked. At 26.1 liters, it is a rare breed that actually listens to what a builder needs, offering enough room for a full Micro ATX board without wasting space on empty plastic. This model is often sold under different names by various vendors, but the core identity remains the same. It is a dense, high quality steel box that manages to swallow a massive triple fan graphics card and a 280mm liquid cooler, all while staying compact enough to sit comfortably on a small desk.

The real draw here is the incredible modularity and the way every panel snaps off without tools to let you reach every corner of the interior. You get the freedom to mount your power supply in multiple spots or even invert the entire case if you want your components to face the other way. This level of flexibility solves the biggest pain point for small form factor enthusiasts because it does not punish you for using standard, affordable parts. Instead of fighting against the frame, you find that the case actually works with you, providing plenty of tie down points to keep your cables tidy and out of the way.

Longevity is just another word for the reliability that comes with this chassis. The build quality is surprisingly thick and heavy, giving it a sturdy feel that many of its more expensive rivals lack. It adds modern touches like a front panel USB-C port and an optional expansion bracket for extra cooling, ensuring your setup stays relevant even as parts get bigger and hotter in the coming years. It is a straightforward, well engineered tool that prioritizes a clean look and high airflow, making it a legendary choice for anyone who wants a small PC that will last through multiple upgrades.

Lian Li DAN A3 (26.3 Liters)

SPECIFICATIONS

Motherboard: Micro ATX, Mini-ITX | Dimensions: 16.54 x 9 x 15.35 inches | Included Case Fans: 5x 120mm ARGB | GPU Length: 340mm | CPU Cooler Height: 180mm | Liquid Cooling Support: 1x 280mm, 1x 240mm |

The Lian Li DAN A3 is the result of a collaboration between Lian Li and German designer Daniel Hansen, and its goal is refreshingly simple: make small builds easier and cheaper. It is meant to avoid the usual small-form-factor compromise where you are forced into pricey, specialized parts just to save space. Instead, the A3 focuses on practicality and flexibility, even if it ends up a bit larger than ultra-slim cases.

At 26.3 liters, the A3 is compact without feeling cramped. It uses a dense mesh design on nearly every side, and despite its size, it supports a standard Micro-ATX motherboard and a full ATX power supply, which is rare in this class. It is smaller than many budget mATX towers, yet sturdier and more forgiving than ultra-thin cases like InWin or Jonsbo. The most interesting part is the adjustable power supply bracket, which can be mounted in several positions. You can raise it to clear space for a large graphics card, or lower it to make room for cooling. It is the kind of case that rewards patience and planning, letting you fine-tune the layout until everything fits just right.

Cooling is where the A3 really stands out. With mesh panels everywhere, airflow is never a concern, though fan noise is more noticeable than in closed designs. It even supports a 360mm radiator, which is almost unheard of at this size and makes it well suited for high-end CPUs. There is no glass, no built-in lighting, and nothing flashy here. It is a straightforward steel box built for people who care more about performance and smart layout than looks. The A3 feels like a case designed by someone who actually builds PCs, and for that reason alone, it earns a lot of respect.

darkFlash WD200 (28.7 Liters)

SPECIFICATIONS

Motherboard: Micro ATX, Mini-ITX | Dimensions: 16.54 x 9 x 15.35 inches | Included Case Fans: 5x 120mm ARGB | GPU Length: 340mm | CPU Cooler Height: 180mm | Liquid Cooling Support: 1x 280mm, 1x 240mm |

The darkFlash WD200 feels like a small luxury PC case done right. It delivers that high-end, furniture-style look without the usual premium pricing. At 25.1 liters, it sits in the same size class as the SAMA IM01 Pro, but the real standout is the walnut wood veneer front panel, which gives it a warm, refined presence instead of the typical metal-and-glass look. The case feels solid and well made, with support for a full-size ATX power supply and large triple-fan GPUs up to 355mm, so you are not giving up performance to get good looks. The built-in top handle is a smart addition, making it easy to move between rooms or carry to a weekend setup without stress.

Airflow is handled better than you might expect for a case this stylish. Instead of glass, darkFlash uses full mesh side panels, letting air move freely through the system from both sides. This works especially well for compact builds using hotter modern CPUs and GPUs. The top I/O includes a USB-C port, and there is enough clearance for a 165mm air cooler, which means you can use strong, standard cooling solutions instead of struggling with low-profile parts. The WD200 strikes a rare balance between portability, cooling, and appearance, making it a practical yet refined choice for anyone who wants a compact PC that looks just as good in a professional office as it does at home.