Top 5 Smallest ATX cases in 2020 – Do more in less space!

A small ATX case is great when you want a small-sized build but not use a micro ATX or mini ITX motherboard. The smallest ATX cases will give you the power of an ATX board while also giving you freedom with a small-sized build space.

Now, a small ATX case will still be bigger than a smallest micro ATX or Mini ITX case. But you are getting the power of a full-sized ATX motherboard. There are many options available for ATX cases, which vary in design, durability, airflow, cooling, connectivity, etc. Here are have 5 Best ATX cases that we have chosen from the whole lot available out there. Let’s review each one and see why it would be best for you.

List of Best Smallest ATX cases

  1. Cooler Master HAF XB EVO
  2. Corsair CC-9011030
  3. Fractal Design Meshify C
  4. Cooler Master Masterbox 3.1 TG
  5. Thermaltake Core G3 ATX

Cooler Master HAF XB EVO

smallest ATX cases
The Cooler Master HAF XB EVO proves to be one of the smallest ATX Cases in the market right now. The HAF XB EVO praises itself for its flawless ability to enhance airflow in your computer system.

The cabinet claims to provide excellent cooling features that enable your system to deliver the best performance. It is specially designed to enhance the flow of air in your system and provide it with optimum cooling. It, therefore, ensures the highest possible performance of your hardware.

Not only can the Cooler Master HAF XB EVO be used as a case for a gaming computer, but it can also be used as a test bench, a LAN box, or an HTPC case.

Design and Build

The HAF XB EVO comes in the shape of a cube combined with Cooler Master’s High Airflow’s flawless cooling capabilities.

With the first look at the system, one can easily see that the case exhibits an aggressive look and talking about the build quality, simply excellent. The whole case is built with durable steel except the front panel, which is made of plastic. Overall it is sturdy and rigid, considering the case only weighs about 18 pounds.

On either side, the cabinet is provided with a handle enabling you to lift it and carry it quite easily without any hassle. Thus it is highly portable.

Considering its weight, it might not be the best for a LAN setup, but it serves the purpose and covers all user needs.

The front panel houses the rest and power buttons allowing you to operate the system from outside. It also has its audio ports in the front for adjustments to the audio. 


The Cooler Master HAF XB EVO focuses mainly on two objectives- simplicity and flexibility. The case comes with a removal motherboard tray allowing easy access to the motherboard to install or remove parts and make necessary modifications anytime. The case can hold up to 4 hard disk drives or solid-state drives according to user choice. 

The drive bay slots and X-Dock bays makes swapping of hard drives seem rather effortless. There are also 2 USB 3.0 ports on the front.

The HAF XB EVO is great at keeping the system cool, up, and running with its high airflow and ventilation system. It houses two trifle fans in the front and is also capable of supporting a 240mm radiator. At the top, the case is provided with a flat mesh to dissipate generated heat and create a strong front to back airflow.

 Moreover, the HAF EVO Cooler Master also comes with side panels that can be removed in case the user wants more ventilation area. The case note only ensures minimal heat build-up in the system but also increases airflow also comes with two side panels that can be easily removed, thereby providing large ventilation areas for the system. 

The cabinet, though small, comes with enough space and water cooling cutouts to enable its users to install water cooling systems for high-end systems mostly for gaming purposes.

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Corsair CC-9011030

Corsair CC-9011030

The Corsair CC-9011030 or the Corsair Carbide Series Air 540 does not look like the typical cabinets nowadays in the market. This smallest atx case is cube-shaped with a wider chassis. 

Corsair mainly focused on compartmentalizing the processor, GPU, and the motherboard from the rest of the system with this dual-chambered cabinet.

Other than this, Corsair also provides excellent airflow and ventilation facilities with the CC-9011030.

Design and Build Quality

The case is made up of mainly two components- Steel and plastic. A combination of both ensures a sturdy design with a great quality build, which is durable. The case comes in two colors- black and white.

On the front of the case towards the left, it has a large honeycomb ventilation section. Behind this are two Corsair AF140L white LED fans. 

On to the other side, there are two 5.25-inch drive bays. Below that, you have two USB 3.0 ports, HD audio connections, power button, hard drive activity LED, and the reset button.

Even though the chassis is very easy to build and greatly designed, it is still not the quietest. The availability of enough cable routes allows the system to look clean and convenient to modify.


The honeycomb mesh section is provided on the top of the cabinet of the Corsair CC-9011030 too. At the top, there is room for two fans, one 120mm and the other 140 mm. The removal of two screws allows easy access to the top part and remove it for the installation of water cooling systems or fans or any modifications you need to make 

The side panel of the case houses a huge acrylic transparent window, from which you can take a look inside. The other side panel does not feature anything and is plain except some ventilation holes at the bottom

The Carbide Series CC-9011030 supports any E-ATX, ATX, Micro ATX, and Mini-ITX motherboard. On the inside, the case comes with 9 cable routing holes, and 8 of them have rubber inserts.

There are 8 expansion slots with thumbscrews on them, allowing easy installation of expansion cards. Towards the up, there is the AF140L exhaust fan for eliminating excess heat build-up inside the system.

On the opposite side of the case, you can install your 5.25-inch drives, 2.5-inch drives, and power supply. The 2.5-inch hard drive case uses a tool-less system and supports up to 4 hard drives or Solid-state drives

The dual-chamber design enables the ATX case to deliver cooler air to the system’s processor, graphics cards, motherboard, memory, and other PCI-E components.

That lack of dust-proofing is the only downside to the Corsair CC-9011030, but considering its price provides excellent airflow and does the job of keeping the system cool. If you have the money and need the space, then this case is an excellent choice.

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Fractal Design Meshify C

Fractal Design Meshify C

The Meshify C does not resemble a typical ATX cube. It is a mid-tower cabinet that has a very simplistic design and with enough room to install all necessary components which you require in your system.

Build and Design

The atx case features a front panel that is completely covered with a mesh that gives it a new fresh look and significantly increases airflow and ensures maximum cooling. Most of the case is made of solid steel components and a few parts with ABS plastic.

The front metal mesh encloses a foam filter and a frame made of plastic, which prevents dust accumulation. The top panel is made of plastic and is removable. It consists of a magnetic filter. The case mainly prioritizes colling, and thus this inst the best choice if you want a super quiet system. 

The motherboard installation is not much of a hassle. Above it, there is enough available room for a thin radiator and fans.

Towards the bottom end, a sliding dust filter is provided to cover the intake fan ant the power supply air intel. The Meshify C also comes with a removable power supply flange, a slide-able exhaust fan mount, and seven expansion slots in the rear panel.

The top of the case is steel made and houses a mesh needed to keep structural integrity. The thin steel around the edges allows the top to be opened up for installing fans and allow passive airflow, which is covered by a magnetic dust filter.

The front panel has a hinge and can be opened up to see a foam dust filter and room for mounting multiple 120mm and 140mm fans and radiators. A single 120mm fan is already included.

A 5.4-inch deep removable panel is also included that can be removed to install a large radiator. 

Simply speaking, Meshify C is a durable and sturdy piece of hardware that has a good build quality.


Above the bottom panel with the sliding dust filter, there is the hard drive cage, which has two trays for a 3.5-inch hard drive and a 2.5-inch hard drive. 

The USB ports and the audio inputs are situated on the top near the front panel.

 The cabinet has a very streamlined high-airflow design and has total room for five drives.

The drive trays have vibration-dampening rubber grommets, thus cushioning them for smooth and flawless operation.

The inside looks clean and comes with velcro loops to hold the wires, allowing hassle-free access to the system whenever needed.

The front I/O panel provides a pair of USB 3.0 ports and HD Audio jacks. Also the power buttons, and a much smaller reset button is provided there too.

The pair of Fractal Design Dynamic X2 GP-12 120mm fans, one in the front, and one in the back are mainly responsible for emitting heat and maintain airflow. The floor of the chassis has room for a single fan.

The only disappointing feature is that the USB 3.0 cable from the front I/O can be too short for some people. The case may not be the most attractive but is excellent for a mid-priced one.

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Cooler Master Masterbox 3.1 TG

slim atx cases

Cooler Master presents one of its compact ATX cases with a very budget-friendly price tag with the launch of the Masterbox 3.1 TG. It is a Micro-ATX or mini-ATX case.

This cabinet might not be the cheapest in the market, but if you want a mid-priced case with tons of features, great cooling capabilities, and enough space for your system, the Cooler Master Masterbox 3.1 TG is a great choice.

Design and Build

The Cooler Master Masterbox 3.1 TG does not go overboard with the look and exhibits a simple but sleek and stylish design with a bit of color to charm the customers. 

One of the most notable things on this small atx case is the last transparent window on the side to take a look at the inside. The glass panel is made of tempered glass.

The front panel of the case has a dark mirror finish to showcase the RGB lights of the components inside the system, but that is not so great for the airflow. The front of the cabinet lacks sufficient ventilation capabilities using the direct airflow design.

On the top, there is a bezel towards the front housing the ports and I/O panel. It comprises of the basics such as the USB 2.0 and USB 3.0 ports and the audio jacks. The bottom has a rear slide-out PSU dust filter.

The rear panel of the Masterbox 3.1 TG comes with the already installed MasterFan Pro to vent out the heat. Being a mini-ATX sized case, it offers 4 expansion slots to fit your GPU and other components.


You can install a GPU up to 345mm in length, which is great for dual fan cards as it expands your options. The Masterbox 3.1 also supports SLI configurations and dual-slot cards. Despite the MasterBox Lite 3.1 being a smaller case than most of its other competitors, there is honestly quite a lot of room inside of it.

A micro-ATX or a mini-ITX motherboard can be installed inside of it. It has the dimensions 456mm x 208mm x 381mm. The case weighs about 9 pounds, and with a full system inside of it, it would weigh in at about 15 pounds, which makes it light enough to be used as a LAN case.

The case can support four fans and has a ton of space for a liquid cooling radiator on the front and the back of the case.

Another unique feature that other small budget-friendly cases don’t often come with is that the PSU is mounted on the bottom rather than the top. This is a plus because it allows better airflow and thus enhances cooling abilities. 

The hard drive cage can hold up to two drives and has a 2.5″ mount on top. Ideally, one can install either two 2.5″ or 3.5″ and one 2.5″ on top of the cage. The cage is removable, which allows easy access to manage your power cables.

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Thermaltake Core G3 ATX

compact ATX cases

Thermaltake claims the Core G3 to be a slim ATX chassis. This is for the simple reason that rather than offering full ATX compatibility, as one would expect given it can house ATX motherboards, it’s limited to SFX PSUs.

The latest Core series chassis presents the Core G3, which brings a new aspect to the Core series. The idea here is to stick with a slim design, which has made this line of cases so well accepted, but the primary reason for this design was to bring ATX gaming into the living room. This compact design is made to allow the most powerful of systems to be installed, so that you can run games at 4K and with VR, from the comfort of your couch.

Design and Build quality 

The Core G3 has a large mesh in the front panel and another one on the roof, as well as a perforated grill in the rear end. The roof has a magnetic dust filter, while the front ports and buttons sit at the top of the front panel. They include the general USB 2.0 and USB 3.0 ports and the audio jacks, which is removable. 

On removal, you can see another dust filter that provides access to the storage bays, with another filter in the base catering for the PSU and another large mesh vent.

The case sports a large side glass window and includes rubber stick-on case feet, which allow you to use the case in desktop mode, with the window pointing upwards. In tower mode, it occupies less space and can fit in smaller areas.


The Core G3 already comes installed with two fans installed in the front panel of the case, and both are 120mm Turbo fans.

Inside the case, you can find a cage for housing storage drives. It can house either two 2.5″ drives or two 3.5″ drives. While there are only two expansion slots in this chassis, motherboard compatibility allows for Mini-ITX, Micro-ATX, and even ATX motherboards. 

The front I/O panel delivers a pair of USB 3.0 ports, a couple of USB 2.0 ports, HD Audio, a power button, a reset button, and a pair of activity LEDs. 

The Core G3 houses the PSU at the rear of the case in the base, just like most ATX cases, but SFX PSUs are less than 130mm across compared to 150mm for ATX PSUs, combined with the very slim chassis design, the case only measures 140mm across. Despite this, though, it is capable of housing an ATX motherboard, a full-size graphics card, and 240mm radiators and custom liquid-cooling systems.

The cabinet can support a pair of 120mm fans in the front, but also supports the same size radiators. Thickness depends on the components chosen to fill the chassis, but 30mm thick radiators are said to fit easily, which is more than plenty. 

There is space at the top to fit another 120mm fan, which can also be used as exhaust.

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When getting a Case for your PC, you should keep a few points in mind. Let’s discuss.

Look for a Case which supports your motherboard

Now here we have reviewed some smallest ATX cases that support ATX motherboards. Similarly, if you have some other type of motherboards like the mini-ITX or micro-ATX, then be sure you check its compatibility.

Compatibility with other components

Be sure you check not only the motherboard but also all other components, so you don’t have to change later. Check the size of components such as the PSU, CPU, motherboard, fans before getting a case for your build.


Don’t just get yourself a good looking case but get yourself a durable and good looking case. Ignoring durability could mean you are struggling with a fragile case that needs to be changed or repaired more often. Always look for steel or aluminum made cases for extra durability.

Heating Issues

A lot of hassle with the heating can be easily solved if your case has proper ventilation. Make sure you’re getting one with proper airflow.


Someday there will be new components out in the market. You will want to upgrade your PC. Don’t buy a case that will stop you from doing that. Get a PC case that has some space for new components.

Apart from all this, keep a note of cable management, dust filters, etc. when getting a PC case. I hope this guide helps you in making an informed decision for getting the best smallest atx cases.

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