The 9 Best Smallest ATX Cases in 2021 (Compact PC Builds)

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The Best Smallest ATX Cases are the case that will give you long service. This article is mainly about the best smallest ATX cases that offer you the amenities of a modern computer system.

The user interface that comes with these computers is very attractive and it can be accessed by all types of individuals without any trouble.

Many companies are engaged in delivering these computers all across the world. These cases are very good in design and they offer you a wide range of amenities.

These days there is a lot of technological advancement which has been seen that has completely revolutionized the use of computers in various fields.

These cases are made by using the best quality materials that offer you extended durability. There are many different sizes for unique cases, however, they can range from small to huge.

Most people don’t want a huge case around their computer, and the best option is to get a smaller ATX case.

The Best Smallest ATX Cases (Compact PC Builds) – Our Top 9 Picks

In this article, we will take a look at the best smallest ATX cases that can currently be purchased.

Product NameProduct ImageDescriptionsPrice
NZXT H510 Compact ATX Mid-Tower PC Gaming CaseBrand: NZXT
Material: Tempered Glass
Cooling Method: Water, Air
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Cooler Master MasterBox Q500LBrand: Cooler Master
Material: Acrylic
Cooling Method: Air
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Cooler Master HAF XB EVOBrand: Cooler Master
Material: Solid Steel
Cooling Method: Air
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Corsair Carbide Air 540Brand: Corsair
Material: Alloy Steel
Cooling Method: Air
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Fractal Design Meshify CBrand: Fractal Design
Material: Tempered Glass
Cooling Method: Water, Air
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Thermaltake Core G3Brand: Thermaltake
Material: Alloy Steel
Cooling Method: Air
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Cooler Master MasterBox Lite 3.1Brand: Cooler Master
Material: Acrylic
Cooling Method: Air
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Cooler Master MasterCase H500PBrand: Cooler Master
Material: Tempered Glass
Cooling Method: Water, Air
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Lian-Li Case O11D MiniBrand: Lian Li
Material: Aluminum
Cooling Method: Air
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Buying Guide

They have been selected by considering factors like performance, reliability, airflow design, and noise management. The detailed description of our top 9 picks is as follows:

1. NZXT H510 Compact ATX Mid-Tower PC Gaming Case

NZXT H510 Compact ATX Mid-Tower PC Gaming Case
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Brand NZXT
Color Black
Material Tempered Glass
Cooling Method Water, Air
Motherboard Compatability ATX
Item Weight 18 Pounds
Item Dimensions LxWxH 16.85 x 8.27 x 18.11 inches
Case Type Mid Tower
Number of Expansion Slots 7
Total USB Ports 1

The NZXT H510 is a purpose-built PC gaming case that integrates seamlessly into your home entertainment system.

Equipped with front I/O USB Type C, two tempered glass panels for side and top views of interior components as well as water-cooling ready capabilities this product has it all.

NZXT is a well-known company that specializes in designing and manufacturing many different types of products primarily for gamers, such as their new H510 case.

These Best Smallest ATX Cases offer an attractive size range. It is the perfect computer case for gamers looking to maximize their performance.

This Gamer’s Case is a durable case for your PC with hard-shelled sides that are made from Tempered glass.

The modern look will complement any gaming setup while the single screw installation makes it easy to install on any flat surface.

The sleek design of this gaming case makes it perfect for any gamer on the go. The innovative patented design of this gaming case makes wiring easy and intuitive.

It features pre-installed channels that are secured with straps, giving you simple access to connecting your cables without the hassle.

The Aer F120mm fans included in this case provide optimal internal airflow and the front panel, PSU intakes include removable filters for ease of installation.

The bracket designed to hold radiators up to 240mm allows you flexibility when choosing between closed-loop or custom loops water cooling.

This gaming case is perfect for those who want to build a powerful PC that can fit in an extremely small form factor.

It features the support of motherboards, Mini-ITX and MicroATX boards as well the typical ATX format size computers.

However, it lacks a top exhaust fan which can keep your machine cool under stressful situations like intense gameplay sessions.

Pros
  • Equipped with Front I/O USB Type C
  • Hard-Shelled Sides
  • Single Screw Installation
  • Pre-Installed Channels
  • Support of Motherboards
Cons
  • Lacks top exhaust fan

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2. Cooler Master MasterBox Q500L

Cooler Master MasterBox Q500L
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Brand Cooler Master
Color Q500L
Material Acrylic
Cooling Method Air
Motherboard Compatability ATX
Item Weight 3.83 Kilograms
Item Dimensions LxWxH 15.2 x 9.1 x 15 inches
Case Type Mini-Tower

The Cooler Master MasterBox Q500L is a Micro-ATX tower that features an Intel or AMD-powered ATX motherboard.

It also has a magnetic dust filter with a transparent acrylic side panel for excellent ventilation and easy access to all components inside.

It also comes equipped with adjustable I/O ports which ensures top performance. This sleek-looking Micro Gaming Case from Cooler Master keeps your machine running smoothly.

These Smallest ATX Cases are fully equipped workstations that will have everything you need to get started on any type or size build.

This gaming case is the perfect case for builders looking to build a standard ATX system that supports motherboards of all shapes and sizes.

Its compact dimensions mean it can be placed in any corner without blocking anything else on your desk, so you’ll never have an issue finding space when building new PC components.

The perforated metal chassis offers a lot more airflow than normal, which means that various cooling system configurations are possible.

The top panel is also fully opened for better ventilation and to let hot air escape from inside the case as needed. The front grill allows cool breezes in while exhausting warm ones out – something all gamers need.

The I/O panel can be positioned in 6 different orientations, including vertical and horizontal. This case has rubberized screws that replace its feet to supplement each orientation with ease of access for either placement on a desk or flooring without worry about scratching its surface material.

However, there is no dedicated reset button, so you’ll have to hit the power button and select “power off” or close your computer manually when done using them for a while.

Pros
  • Magnetic Dust Filter
  • Adjustable I/O Ports
  • Supports Motherboards of all Shapes and Sizes
  • Perforated Metal Chassis
  • Excellent Ventilation Systems
Cons
  • Reset button not available

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3. Cooler Master HAF XB EVO

Cooler Master HAF XB EVO
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Brand Cooler Master
Color Black
Hard Disk Form Factor 3.5 Inches
Cooling Method Air
Fan Size 120 Millimeters
Motherboard Compatability ATX
Item Weight 1 Pounds
Item Dimensions LxWxH 16.7 x 17.4 x 13 inches
Case Type Mini-Tower
Fan Count 2

When you’re looking for a customizable computer case with cooling and airflow, look no further than the Cooler Master HAF XB EVO.

With this desktop Lan Box enclosure system in tow that supports ATX motherboards, as well as dual radiators upfront or bottom, mounted fan slots; it will be hard not to find all your needs met by one sleek package.

This Smallest Full ATX Case has a bulbous design that has been custom made for circulation purposes, which makes it perfect to install in an office or home environment with limited space constraints.

This is a case that can accommodate up to six drives with room for your processor, memory, and graphics card.

It also features powerful airflow through two trifle fans in front or behind the motherboard tray depending on what kind of cooling you prefer.

It is designed to support a tower CPU cooler up to 180 millimeters tall, and high-end VGA coolers as long as 334 millimeters.

There is also room for 4 HDDs or SSDs by removable HDD cages which allow you the option of installing components easily without having them be in your way while not using all available slots on the motherboard tray.

The updated interior of this case allows it to house a Micro ATX or an ATX motherboard, as well as any other standard size expansion card.

The exterior includes two USB 3.0 SuperSpeed ports and X dock slots on the front for Lightning-fast plug n play IO with rigid carry handles that are sleek in design—perfect if you’re trying not only to keep your device safe but also stylish.

However, the absence of spare parts for this ATX case has caused many people great disappointment, considering how rare and hard-to-find these cases can be sometimes.

Pros
  • Dual Radiators
  • Accommodate Up to Six Drives
  • Powerful Airflow
  • Easy Components Installation
  • USB 3.0 SuperSpeed Ports
Cons
  • Spare parts not available

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4. Corsair Carbide Air 540

Corsair Carbide Air 540
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Brand Corsair
Color Black
Material Alloy Steel
Hard Disk Form Factor 2.5 Inches
Cooling Method Air
Motherboard Compatability ATX
Item Weight 16.3 Pounds
Item Dimensions LxWxH 16.3 x 13.1 x 18 inches
Case Type Desktop
Total USB Ports 4

The Corsair Carbide Series Air 540 is the perfect case for gamers who want to build their PC. With its black color and sleek design, this ATX Cube will blend in with any decor while providing outstanding cooling performance.

These Best Smallest ATX Cases have an excellent airflow rating which ensures high levels of ventilation inside it.

It features an easy-access front panel with ample room for cable management, two USB 3.0 ports right next door at your fingertips.

This ATX cube case is perfect for gamers who want maximum performance from their system without sacrificing anything else. It has a direct airflow path that reduces hotspots and makes for an unbeatable experience.

The amazing design of this product allows hot air to escape, leading towards high levels of cooling potentials throughout your system with ease.

With an advanced front panel, it can be easily removed for cleaning and maintenance purposes without having to take apart your entire system.

This gaming cube case comes with 8 expansion slots and two 5.25 inch, four 2.5inch/3.5in combo bays for a total storage capacity of 20 slot drives or upgradable internals up to ten (10) 3.5-inch HDDs.

This beautiful cube case is the perfect way to protect your device. It has a full side panel window, cable routing cutouts with a rubber grommet for easy installation and removal of cables without stress or worry about damaging them in any way.

However, the fan is not connected to Corsair Link. A PC case with no link enabled will have a hard time cooling because the noise and heat are not being dispersed properly, so you may want this fixed for your safety.

Pros
  • Outstanding Cooling Performance
  • Easily Accessible Front Panel
  • 8 Expansion Slots
  • Sufficient Storage Capacity
  • Easy Installation
Cons
  • Fan not connected to Corsair Link

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5. Fractal Design Meshify C

Fractal Design Meshify C
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Brand Fractal Design
Color Black
Material Tempered Glass
Cooling Method Water, Air
Motherboard Compatability ATX
Item Weight 5 Kilograms
Item Dimensions LxWxH 16.1 x 8.54 x 17.72 inches
Case Type Mid Tower
Total USB Ports 2

Fractal Design Meshify C offers high performance and cooling in a small package. The compact design features two fans which are included, as well as an easily removable PSU shroud to maximize internal space for water-cooling systems.

The slimline interior layout makes it easy to install hardware without any need for planning around cable management necessary when building new PC gaming rigs.

Tempered glass side panel windows allow users access inside their computer while keeping things protected from damage outside interference.

Thanks again USB 3.0 transfer speed so there will be no waiting around on games loading during intense action sequences – this ATX Compact Case has got you covered.

It is the perfect computer case for you if all your needs can be met by a small and compact design. It comes with two mounting fans so that everything doesn’t have to take up extra space on an external device cable tray (like those little HDMI ones).

And lastly, there are plenty of RGB lighting options available as well to make sure this baby shines bright at night or during daytime gaming sessions in total darkness.

The exterior side panels of this case come off very easily without any tools needed making installing hardware much easier than ever before.

It is the perfect case for gamers looking to build their dream system. This compact computer case has everything you need in one place.

The HDD racks allow plenty of room at the bottom where water-cooling components can rest while keeping your data safe from dust or other debris.

However, the unfortunate reality is that there’s no space for new AMD cards in this ATX case.

Pros
  • Easily Removable PSU Shroud
  • Slimline Interior Layout
  • USB 3.0 Transfer Speed
  • RGB Lighting Options
  • Exterior Side Panels Easily Comes Off
Cons
  • No space for a new AMD graphics card

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6. Thermaltake Core G3

Thermaltake Core G3
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Brand Thermaltake
Color Black
Material Alloy Steel
Cooling Method Air
Motherboard Compatability ATX
Item Weight 9.3 Pounds
Item Dimensions LxWxH 17.9 x 14.6 x 5.5 inches
Case Type Full Tower
Fan Count 2
Number of Expansion Slots 2

The Thermaltake Core G3 is a slim and stylish computer case that can fit any type of gaming PC, be it an ATX or MicroATX.

It comes with the LCS certified Tt LCS Logo, so you know your gear will look good no matter where in their system they are placed.

The black exterior finish on this Smallest Mid Tower Case provides for amazing aesthetics as well as protecting against scratches all while being lightweight enough not to weigh down upon installation onto one’s desk.

This Core G3 is a perfect fit for your desk or living room. The compact micro slim design ensures that it will be easy to transport, and the LAN party-ready feature is great if you want to take your gaming on the travel with no worries.

The floating GPU design means that your graphics cards will be at the forefront, with their faces turned up towards viewers instead of down on all fours like other stands do.

Opt for the best cooling in your system with this great cause. You’ll get two 120-millimeter front fans that are pre-installed, as well as a pair of handy I/O ports and expandability options so you can fit just about any equipment.

This case is an excellent choice for custom PC enthusiasts who want to find a balance between cost and performance.

It provides flexibility in its multiple configurations, making it easy to build any kind of system imaginable with this budget-friendly product.

However, if you want to cool your PC with more fans, then this ATX case isn’t the best for it. The lack of support for extra fans makes it difficult to dissipate heat.

Pros
  • LCS Certified
  • Lightweight Design
  • Handy I/O Ports
  • Multiple Configurations Possible
  • Budget-Friendly Product
Cons
  • An extra fan isn’t supported

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7. Cooler Master MasterBox Lite 3.1

Cooler Master MasterBox Lite 3.1
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Brand Cooler Master
Color MB Lite 3.1
Material Acrylic
Cooling Method Air
Motherboard Compatability Micro ATX
Power Supply Mounting Type Bottom Mount
Item Weight 8.7 Pounds
Item Dimensions LxWxH 17.62 x 7.5 x 15 inches
Case Type Mini-Tower
Fan Count 3

Cooler Master New MasterBox Lite 3.1 Micro-ATX Tower is a perfect choice for those looking to build or mod their PC with ease.

It features three custom color trim options, as well as a transparent acrylic side panel (MCWL3B300). These Best Smallest ATX Cases come equipped with an input power supply and two USB 2.0 ports at the front edge along with one fan controller on top.

It also has room inside should you need another expansion card slot after installing your system components into place.

There are two additional PCI Express x16 slots available when needed further up above. It has been designed for those who want an easy-going compact case that can house all their essential components in one place without taking up too much room or sacrificing performance.

The Dark Mirror front panel and customizable trim colors of this ATX case make it stand out from the rest. The full black coating keeps your system protected without sacrificing style or performance.

Get the most out of your build with this case’s transparent side panel. The large window lets you view all the beautiful components and support up to 3 fans and water-cooling systems.

This case has a cable routing behind the motherboard tray, making it easy to manage and hide all your cables.

The depth of this PSU housing measures 9mm deep (0.3 inches) for the power supply cable; 15 mm regarding storage behind the motherboards tray. Both statistics are sufficient space available when you need them most.

However, it is extremely difficult to access the power supply switch with this ATX case. The lack of a readily available panel makes it hard for technicians who need quick and easy access.

Pros
  • Three Custom Color Trim Options
  • Transparent Acrylic Side Panel
  • Room for Extra Expansion Card Slot
  • Two Additional PCI Express X16 Slots
  • Support up to 3 Fans
Cons
  • Power supply switch not easily accessible

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8. Cooler Master MasterCase H500P

Cooler Master MasterCase H500P
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Brand Cooler Master
Color White
Material Tempered Glass
Cooling Method Water, Air
Motherboard Compatability Mini ITX
Item Weight 11.6 Kilograms
Item Dimensions LxWxH 21.42 x 9.53 x 21.34 inches
Case Type Full Tower
Fan Count 2
Total USB Ports 4

Cooler Master is a well-known company in the computer hardware industry. They have released Cooler Master MasterCase H500P with innovative features.

The colorful exterior of this product not only looks great but also provides you cooling performance as high airflow mesh front panel alongside tempered glass sides allows plenty of light into the interior.

The RGB LED lighting adds more fun during nighttime use making sure everything stays cool inside without any worries about overheating.

This Compact ATX Case is a high-performance cooling solution for gamers, content creators, and overclocking enthusiasts.

The entire interior of this case has been powder coated in black so there isn’t anything flashy about it but instead focuses more heavily on what lies inside where most users put their focus.

If you’re looking for a case that’s perfect to house your latest project, take note of this amazing gadget.

This ATX computer cabinet features two 200mm RGB fans behind its front panel and covers made out of durable mesh material so dust won’t get in while still providing great airflow.

Plus, there are vertical GPU mountings on top as well without compromising any other components like CPU cooler slot spacing or expansion slot availability.

For a sleek, modern gaming PC that’s ready to take on anything, you can throw at it this ATX case has the perfect side panels.

Light grey tinted tempered glass is excellent for showing off your build as well. With 1-3 splitter cables available there are multiple light modes and effects accessible with just one plugin.

However, this case doesn’t have plenty of space to house your long GPU, which is one major drawback of this amazing product.

Pros
  • High Air Flow Front Panel
  • RGB Led Lighting
  • High-Performance Cooling Solution
  • Durable Mesh Material
  • Splitter Cables Available
Cons
  • Longer GPU’S not encouraged

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9. Lian-Li Case O11D Mini

Lian-Li Case O11D Mini
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Brand Lian Li
Color White
Material Aluminum
Hard Disk Form Factor 3.5 Inches
Cooling Method Air
Motherboard Compatability ATX
Case Type Mini-Tower
Total USB Ports 3

The Lian-Li Case O11D Mini is the perfect solution to your storage needs. With 3 adjustable tempered glass shelves, it can fit up to 6 drives and still have room for other necessities like liquid cooling systems or air-cooling systems.

These Best Smallest ATX Cases also come equipped with two USB ports that always allow you access without having to remove devices from their holders to get a charge during downtime.

This mini-tower case has been designed to look sleek, modern, and minimalistic while still being strong enough for day-to-day use at home or in-office setting.

The inside of this computer desk-sized cabinet features two 5 1/4″ bays capable handles on either side making installation easy as well providing stability during transport.

This case is designed to hold both ATX and MicroATX motherboards. It can also house up to three 5 1/4-inch hard drives or two 3.5-inch storage devices in its 2 x 2 inches of width by 3 1/2 depth drive bays.

It also offers the convenience of an external expansion slot for adding cards that require more room like PCI Express SSDs with their low-profile adapters.

This case has been made from sleek white plastic and the small size means it will be easy to find places around your desk where you may want extra space.

This case not only has space for your computer but also comes equipped with all the necessary ports. There are 2 USB 3.0 slots, 1 Type-C port, and HD Audio Front Ports so you can enjoy everything this beautiful ATX Mini Tower offers without a hitch.

However, this ATX case is quite an expensive product and not affordable by most people.

Pros
  • Fit up to 6 Drives
  • Equipped with Two USB Ports
  • Easy Installation
  • External Expansion Slot
  • Type-C and HD Audio Front Ports
Cons
  • Quite an expensive product

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Buying Guide for The Best Smallest ATX Cases in 2021

The Best Smallest ATX Cases are preferred more among the users of small computers because of their stylish look, lightweight, affordability, and distinctive features.

Be sure to look into a few important factors before you purchase the Best Smallest ATX Cases:

Size

So, the first thing you must consider while buying a PC case is its size. The size of any product says how much efficient it will be in the future.

If the size of your ATX case is too small, it will start giving trouble after a certain period. To avoid such problems you can go for compact size cases that are known to be the best small-sized PC cases available in the market.

Airflow

The second thing to look out for while buying a PC case is its airflow. Without proper airflow, your device will start overheating.

This will create problems for your device and you need to keep the temperature low, so always go for an ATX case with proper airflow. You can also look out for the side panel fan installation feature as this will help in reducing heat efficiently.

Motherboard Compatibility

Did you know that not all cases are compatible with all motherboards? You will be amazed to find out that different computer cases can support different types of motherboard form factors. So, try to keep the same in mind while buying it.

Compatibility With Graphics Cards

Not just motherboards, but there are chances that you might have to consider compatibility with graphics cards too. Most popular computer cases support GPUs up to a maximum of 410mm in length, but if you want to go for a high-end card then it is necessary to look for a case that supports the longer ones.

Drive Bays

Just like other parts of your PC, hard drives need to be protected too. And this is where Drive Bays come into the picture. Look for a case that has at least enough bays to fit your existing drives and those you would like to install in the future as well.

f you are planning to add hard drives or solid-state drives, ensure that your case’s hard drive bays support the 3.5-inch & 2.5-inch HDD/SSD units properly.

Liquid Cooling Support

If you want to overclock your PC or need it for some other extreme purpose, then it is a good idea to look for a case that supports liquid cooling. Not only do they cool your PC more efficiently, but they also look super stylish.

USB Ports

Computer cases support USB ports on the front side to ease connectivity with external devices like keyboard, mouse, etc. You can go for one that has at least 7 to 10 USB ports for this purpose.

Material

Look out for while buying a PC case is the type of material used in its manufacturing. Never compromise on quality. If you are looking for durable cases, always go for metallic material as it will last longer than any other ordinary plastic alternative available in the market.

Support

ATX cases have a separate compartment for power supply which ensures that the computer parts are well protected from damage due to liquids and dust in the environment. So, ensure that you buy a small form factor case with a PSU compartment.

Cooling Support

Ensure your new mini tower provides adequate airflow and cooling to your system. Most compact form factor cases will come with a rear-mounted radiator to keep the power supply, CPU, and graphics card cool.

Easy Access

If you want external connectivity for your devices, ensure that the new mini-tower has all the required ports at the front for easy access.

SFX Power Supply Support

Ensure your case of choice comes with a power supply unit of appropriate wattage to support your build.

FAQs

What is the smallest ATX case?

The Cooler Master Elite 110 is the world’s smallest ATX case, according to its measurements on Newegg. It measures 10.5 x 7.4 x 11.8 inches, and it can hold microATX motherboards up to 9.6″ long.

Are micro ATX cases small?

No, not really… They are smaller than full ATX cases, but most of them are still around 21 to 24 liters (530 to 660 cubic inches), which is not all that small.

You can fit a microATX motherboard in an ATX case, even though the case may seem rather big for it. Of course, you can put a microATX case into a full ATX case, and it will fit in, with room left over.

Will a micro ATX fit in a compact ATX case?

No, this is not possible. The micro ATX specification requires a midplane on the motherboard to separate the expansion slots from the drive bays. This means that you cannot use one of these boards in a case that does not have a midplane.

What is the cheapest micro ATX case?

Probably the Cooler Master Elite 130 which you can find for around $20 online.

What is the quietest micro ATX case?

The Fractal Design Node 202 offers sound dampening materials on every side inside its steel frame, making it an overall good choice for noise-sensitive users with a limited budget.

What is the easiest micro ATX case to build in?

The Silverstone Milo ML05 is aimed at HTPC users, but it has good cable management and space behind the motherboard tray for hiding cables, so it’s a great choice even if you want to use it as your main rig.

Conclusion

The smallest size may vary from each person’s perspective, however, for this article, we will look at what ‘smallest’ means in the computer industry.

Based upon the above review of the products I would strongly recommend the NZXT H510 as The Best Smallest ATX Case as it is equipped with Front I/O USB Type C and possesses hard-shelled sides.

Furthermore, it exhibits the single screw installation along with pre-installed channels and motherboard supports.

As a second choice, I would surely recommend the Thermaltake Core G3 being the most budgeted product of the lot. It is LCS certified and has a lightweight design. Also, it comes with handy I/O ports having multiple configurations.

I hope you liked this blog post. Looking forward to hearing your experiences and opinions with the Best Smallest ATX Cases in the comment section of this article.

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