Smallest ATX Cases to Buy

So you have decided on the main components that will go into your PC. And it’s now time to grab the case that will house your system. Yet, you don’t seem to find your ideal fit because you want the smallest ATX case you can get.

With PC parts getting even smaller, going small on the case makes a lot of sense. You will build a PC that can fit even in the tightest of places, but still powerful enough to give you some 4K VR gaming. Or serve as your productivity powerhouse without taking up all the space on your office desk.

If this sounds like something you’re up to, be rest assured you’re a read away from the solution. We’ve compiled the best compact cases that fit ATX components without compromising on performance. We have also added bonus tips on the key aspects you need to consider before settling on your ideal small form factor ATX case.

Best Smallest ATX Case for 2019

Case NameWeightDimensionColor 
Corsair Carbide Air 54016.3 pounds16.3 x 13.1 x 18 inchesBlackCheck Price
Thermaltake Core G39.3 pounds17.9 x 14.6 x 5.5 inchesBlackCheck Price
Rosewill Cullinan26 pounds8.5 x 19.6 x 18.8 inchesBlackCheck Price
Cooler Master HAF XB EVO18.1 pounds16.7 x 17.4 x 13 inchesBlackCheck Price
Rosewill Cullinan PX Series17.55 pounds18.9 x 18.8 x 14.4 inchesBlackCheck Price
Riotoro CR10808.49 pounds14.1 x 9 x 15.7 inchesBlackCheck Price
Corsair Carbide Series 200R13.3 pounds16.9 x 8.3 x 19.5 inchesBlackCheck Price
Aerocool Aero-1000 Black21.2 pounds22 x 11 x 22 inchesBlackCheck Price
Corsair Carbide 400C14.55 pounds16.7 x 8.5 x 18.3 inchesBlackCheck Price
be quiet! BGW21 Pure Base 60020.9 pounds19.4 x 8.7 x 17.5 inchesBlackCheck Price

1. Corsair Carbide Air 540 – Best Overall

Corsair Carbide Air 540 – Best Overall

Corsair is reputed for designing superior PC products. The Carbide Air 540 compact PC case is one of their best PC cases designed for smaller, neat builds.

It employs a dual chamber design. With the drives and PSU on the back chamber, and the motherboard, CPU, GPU, and memory on the main chamber.

The result is a system that runs cool due to the direct airflow hitting the main chamber components. It suits anyone looking to overclock their system and push them to the limits.

Key Features:

  • Supports E-ATX, ATX, mATX, and Mini-ITX.
  • Up to 6 x 120mm or 5 x 140mm case fans.
  • Features 4 x 2.5”, 2 x 3.5”, and 2 x 5.25” drive bays.
  • 3 pre-installed 140mm Corsair Air Series AF140L intake and exhaust fans.
  • Maximum: GPU length 320mm, CPU cooler height 170mm, and standard ATX PSU length 250mm.
  • Comes with a front dust filter to keep the build clean.
  • An edge-to-edge tinted flush-mount side window (Acrylic).
  • 8 PCI-E slots.
  • Front I/O with USB 3.0 x 2 and Audio In/Out ports.

Corsair Carbide Air 540 offers tons of room to expand your build with high-performance coolers. You can slot in a 360mm liquid cooler on the front panel or a 280mm top radiator.

Pros:

  • Runs quiet.
  • A steel-made cube design that is spacious.
  • Outstanding cooling capabilities.
  • Tool-free PCI-E and storage drive installation.
  • Easy cable management with routing channels.
Cons:

  • A little bit pricey for budget PC builders.
  • Only comes pre-equipped with the front dust filter.
BOTTOM LINE: Corsair Carbide Air 540 stands out as the best compact atx case. Thanks to its superb design with high-performance air cooling and a spacious interior for expansion.

2. Thermaltake Core G3 – Best Slim ATX Case

Thermaltake Core G3 – Best Slim ATX Case

Thermaltake Core G3 is one of the high-quality small pc cases that embrace a slim design. It is designed to fit on your desk or a tight living room. The spacious compartment allows you to build a powerful rig for 4K VR gaming.

Key Features:

  • Supports 12” x 9.6” (ATX), 9.6” x 9.6” (Micro ATX), and 6.7” x 6.7” (Mini ITX).
  • Supports 2 x 2.5” or 2 x 3.5” storage drives with HDD cage.
  • Supports 2 x 120mm fans or a 240mm radiator in the front and a 120mm top fan.
  • Maximum: GPU length 310mm, CPU cooler height 110mm, and SFX PSU length 130mm.
  • Handy Top-Front I/O with USB 2.0 x 2, USB 3.0 x 2, and HD Audio jacks.
  • Compatible with up to NVIDIA Geforce GTX 1080/1070.
  • Two expansion slots.

Core G3 features a nice transparent acrylic side window panel to show-off your build. It has been equipped with a custom GPU mount for a floating GPU design.

Pros:

  • Affordable.
  • Lightweight design.
  • Can orient vertically or horizontally.
  • Comes with 2 pre-installed 120mm fans.
  • Very compact ATX case made of high-quality SPCC.
Cons:

  • Doesn’t support the standard PSU.
  • Cable management can get tough.
Bottom Line: Core G3 features a nice transparent acrylic side window panel to show-off your build. It has been equipped with a custom GPU mount for a floating GPU design.

3. Rosewill Cullinan – Best Looking

Rosewill Cullinan – Best Looking

Rosewill Cullinan is a compact ATX case with a sleek chassis. Designed with custom PC build enthusiasts in mind.

The case features edge-to-edge tinted tempered glass panels on the sides and front. To enhance its elegance, Rosewill has pre-installed 4 x 120mm Blue LED fans.

Key Features:

  • Supports  Micro ATX, ATX,  XL-ATX, and E-ATX motherboards.
  • Supports 360mm radiator on top and front.
  • Supports up to 7 fans: 3 x 120/140mm in the front, up to 3 x 120mm (or 2 x 140mm) at the top, and a 120/140mm rear fan.
  • Maximum: GPU length 420mm, CPU cooler height 180mm, and PSU length 240mm.
    2 x 3.5” and 2 x 2.5” internal drive bays.
  • Made of high-quality plastic, steel, and tempered glass.
  • 7 PCI-E slots for system expansion.
  • Top-mounted I/O with USB 3.0 x 2, USB 2.0 x 2, Audio In/Out, and a Fan-Speed control button.

The 5mm tempered glass and high-quality pre-installed fans ensure that you have a smooth airflow while reducing noise to the minimum. It runs almost quiet!

Pros:

  • Tool-free HDD installation.>
  • Smooth airflow with pre-installed dust filters.
  • Compact chassis with a spacious compartment.
  • A solid, sleek design.
  • PSU shroud to hide the power supply cables.
Cons:

  • Space behind the motherboard tray is very tight.

Bottom Line:
If you are after the best looking ATX case, then the Rosewill Cullinan is your perfect fit. It packs a massive room for longer liquid-cooling radiators and enough space to support the best PC build parts.

4. Cooler Master HAF XB EVO – Best High Airflow

 Cooler Master HAF XB EVO – Best High Airflow

The Cooler Master’s HAF XB II EVO is a compact ATX case designed with versatility in mind. Just like the Carbide Air 540, it has two cooling zones optimized for high airflow.

As a PC builder, there is a lot to accomplish with this box-style case. It can be easily converted into a test bench. Making it ideal for overclockers and gaming enthusiasts.

Key Features:

  • Supports ATX, Micro-ATX, and Mini-ITX.
  • Made of high-quality steel and polymer with mesh front bezel.
  • Maximum: GPU length 334mm, CPU cooler height 180mm, and PSU length 180mm.
  • Packs 2 x 3.5”/2.5” internal drive bay plus 2 x 3.5”/2.5” and 2 x 5.25” external drive bays.
  • Supports up to 4 fans: a 200mm at the top, 2 x 120mm in the front, and a 120mm rear fan.
  • 7 PCI-E for expansion.
  • Front I/O with USB 3.0 x 2 and Audio In/Out.
  • Two Top-Panel designs: windowed for showing off or meshed for a superior cooling.

The case comes with two pre-installed durable XtraFlo fans in the front. It can also support a 240mm radiator for powerful airflow to keep your system running cool.

Pros:

  • Optimized for high airflow.
  • A solid, compact design.
  • Entirely tool-less case.
  • Side panels’ rigid carry handles make it easily portable.
  • Easily removable motherboard tray to install/remove/swap components.
Cons:

  • Pricey.
  • No support for a 360mm radiator.
Bottom line Cooler Master’s HAF XB II EVO features a dual chamber design that concentrates the High-Air-Flow cooling on components that need it more. Making it one of the best smallest cases for ATX MOBO with tool-less components installation.

5. Rosewill Cullinan PX Series Cube Case – Best Budget

Rosewill Cullinan PX Series Cube Case – Best Budget

The Rosewill Gaming ATX Mid Tower Cube Case embraces a stylish dual chamber design. A layout that ensures the hot components like CPU, GPU, and MOBO get unrestricted airflow for better cooling.

Cooler components like the drives, cables, and PSU are ‘hidden’ at the back. Coupled up with the full window tinted tempered glass, you have an amazing, sleek compact ATX case to show off your gaming rig.

Key Features:

  • Supports ATX, Micro-ATX, and Mini-ITX motherboards.
  • Maximum: GPU length 310mm and CPU cooler height 120mm.
  • Supports up to 7 fans: 2 x 120mm in the front, 2 x 120mm at the bottom, 2 x 120/140mm at the top, and an 80mm rear fan.
  • Allows up to 280mm long liquid-cooling radiators at the top or a 240mm in the front.
  • Supports 2 x 3.5” and up to 3 x 2.5” internal storage drives.
  • Front I/O with USB 3.0 x 2 and Audio In/Out jacks.
  • 7 PCI-E slots.

The Cullinan PX Series Cube Case comes in three configurations:

  • Blue Sapphire for good airflow and optimal water cooling.
  • Ruby Red for extreme enthusiasts with a burning passion to showcase their system.
  • Emerald Green for energy-conscious gamers who want a power-efficient system with a sleek style.

And even with its mini-cube design, you are assured of mighty performance. Making it the perfect mini-PC case that houses all your components without getting bulky.

Pros:

  • Affordable.
  • Dual-chamber for high air flow.
  • 3 pre-installed 120mm LED (Blue, Red, or Green) front fans.
  • Spacious interior chamber.
  • Made of solid steel with an aluminum front bezel.
Cons:

  • No support for 360mm radiator.
Bottom Line Rosewill Cullinan PX Series Cube Case stands out for its compact design and a spacious interior compartment. The pre-installed LED fans enhance its sleek look to give you a stylish budget compact ATX case.

6. Riotoro CR1080 – Best for Minimalistic Builds

Riotoro CR1080 – Best for Minimalistic Builds

Riotoro CR1080 features a simple ‘compartment’ design that allows you to build a cleaner and more organized gaming rig. It’s one of the smallest ATX Computer Cases that support Full-ATX motherboards.

Key Features:

  • Compatible with ATX, mATX, and Mini-ITX motherboards.
  • Maximum: GPU length 300mm, CPU cooler height 122mm, and PSU length 220mm.
  • Drive Bays: 5.25″ x 1, 3.5″ x 1, and 2.5″ x 1. Plus a convertible 3.5″/2.5″ x 1.
  • A top I/O with USB 3.0 x 2 and Audio In/Out.
  • A dual-chamber design with a transparent side-window panel for showing off your build.
  • 7 PCI-E slots.

The case is compatible with up to 240mm radiators, with an option for a dedicated intake fan for GPUs. It supports up to 2 x 120mm fans in the front and an 80mm rear fan.

Pros:

  • Affordable.
  • Pre-installed with a 120mm Blue LED fan.
  • Comes with dust filters to keep it clean.
  • Allows for clean cable management.
  • A solid design with a spacious compartment.
Cons:

  • The build material is a thin aluminum – handle with care!
  • The motherboard tray opening is very tight.
Bottom Line Riotoro CR1080 is the perfect case for small PC builds. It fits the standard ATX components, allowing you to build a great gaming rig for tight spaces.

7. Corsair Carbide Series 200R – Best Smallest for Easy Builds

Corsair Carbide Series 200R – Best Smallest for Easy Builds

Corsair Carbide Series 200R features a simple design for easy PC building. It is an affordable small form factor ATX case given that it comes from such a reputable brand.

Key Features:

  • Compatible with ATX, Micro-ATX, and Mini-ITX motherboards.
  • Maximum: GPU length 420mm, CPU cooler height 165mm, and PSU length 200mm.
  • Drive Bays: 5.25″ x 3, 3.5″ x 4, and 2.5″ x 4.
  • Supports up to 8 x 120mm fans.
  • Dust filters in the front and PSU intake to keep your system clean.
  • Top-Front I/O with USB 3.0 x 2 and Audio In/Out.
  • 7 PCI-E Slots.

Despite its compact design, it allows for radiator cooling. The case supports 120mm, 140mm, and 240mm water-coolers. It is compatible with H55, H60, H75, and H80i Corsair Liquid Coolers.

Pros:

  • Affordable.
  • Compatible with liquid-cooling radiators.
  • Cable management made easy with cutout channels.
  • Tool-less SSD, HDD, and ODD installation.
  • Allows for serious system expansion.
Cons:

Bottom Line The Corsair Carbide Series 200R offers you massive storage space. While it can make such a great gaming rig, this case would make a superb desktop workstation.

8. AeroCool Cases Aero-1000 Black – Best Cheap

AeroCool Cases Aero-1000 Black – Best Cheap

Aerocool Aero-1000 Black is a budget-priced compact ATX case that doesn’t compromise on the quality. It is the perfect case for budget-conscious gaming PC builders. It can also house a decent desktop workstation.

Key Features:

  • Supports ATX, MicroATX, and Mini-ITX.
  • Maximum: GPU length 410mm, CPU cooler height 170mm, and standard ATX PSU length 220mm.
  • Large Acrylic side-window panel for showing off the build.
  • Supports top water-cooling radiators of up to 240mm.
  • Supports up to 5 x 3.5″ or 7 x 2.5″ installation.
  • Supports up to 5 fans: 2 x 120/140mm on the front, 2 x 120/140mm at the top, and a 120mm rear fan.
  • Removable and washable dust filters that keep the system clean.
  • A top I/O with USB 3.0 x 2 and Audio In/Out.

Aerocool Aero-1000 Black has a solid chassis. Made of 0.8mm SGCC. It is compactly designed to fit in tight spaces, but spacious enough to house standard ATX components.

Pros:

  • Budget-friendly!
  • Pre-drilled holes for cable management.
  • Shock-proof rubber for PSU and storage drives.
  • Good airflow.
  • 3 pre-installed 120mm fans at the front and rear.
Cons:

  • No support for a 360mm radiator.
Bottom Line If your ideal smallest case for ATX should be priced under $50, this is your best bargain. It cuts out the frills while making the most of the useful small form factor ATX case features.

9. Corsair Carbide 400C – Best Premium

 Corsair Carbide 400C – Best Premium

Yet another compact ATX case by Corsair! The Carbide Series 400C features a sleek, modern all steel exterior design.

With the hinged and latched full side panel window, you get such a gorgeous looking and highly durable PC case. Accessing your build’s components is also easy!

Key Features:

  • Compatible with ATX, Micro-ATX, and Mini-ITX motherboards.
  • Maximum: GPU length 370mm, CPU cooler height 170mm, and PSU length 190mm.
  • Drive Bays: 3.5″ x 2, and 2.5″ x 3.
  • 2 Pre-installed AF120L and AF140L fans.
  • Supports up to a 360mm front, a 240mm top, and a 120mm rear radiator.
  • Supports up to 6 case fans: 3 x 120mm front, 2 x 120/140mm top, and a 120mm rear fan.
  • 7 PCI-E slots.

What’s more, this beast of the small form factor ATX case allows for liquid-cooling. With room for a front, top, and rear radiators. It is compatible with H55, H60, H75, H80i, H90, H100i, H105, and H110 Corsair Liquid Coolers.

The drive cages have been moved from the direct airflow path. Such that all the cool air from the intake is focused on the hot components. Like the CPU or the multiple GPUs that it can perfectly accommodate.

Pros:

  • Easy to assemble and maintain.
  • PSU and 3.5” drive bay cover.
  • 2 pre-installed Corsair AF series fans.
  • A solid build quality.
  • Designed to run quiet!
Cons:

  • No optical drive bays and fan controller.
Bottom Line The Corsair Carbide 400C is one of the smallest ATX computer cases that runs quietly despite the compact and beautiful design. It offers plenty of room for expansion while maintaining its amazing performance.

10. be quiet! BGW21 Pure Base 600 –  Quietest

be quiet! BGW21 Pure Base 600 –  Quietest

Just like Corsair, be quiet is reputed for designing superior quality PC cases. The BGW21 Pure Base 600 is one of their best creations that features a compact design.

The case embraces a highly versatile construction. With removable ODD cage and repositionable HDD slots.

It also packs an adjustable top cover vent that can be completely closed for absolute silence. Opening the top cover partially or fully will allow for more air exhaust.

Key Features:

  • Supports ATX, Micro-ATX, and Mini-ITX motherboards.
  • Maximum: GPU length 425mm, CPU cooler height 165mm, and PSU length 210mm.
  • Drive Bays: 5.25” x 2, 3.5″ x 3, and 2.5″ x 8.
  • Supports up to 360mm liquid-cooling radiators at the top and front panel.
  • Supports up to 7 fans: 3 x 120mm top, 3 x 120/140mm front, and a 120mm rear fan.
  • Made of high-quality steel, 4mm tempered glass, and ABS Plastic.
  • Top-front I/O with USB 3.0 x 2 and Audio/Out.
  • 7 PCI-E slots.

The BGW21 Pure Base 600 compact ATX case embraces a superior build quality. With an edge-to-edge tinted tempered glass side panel for showing off your build.

It is sound insulated. Thanks to the high-quality materials and well-engineered edges! It also includes integrated dampening materials at the top, front, and side.

Pros:

  • Easy to assemble and maintain.
  • Runs super quiet.
  • A solid, lightweight design.
  • 2 pre-installed pure Wings 2 fans.
  • Equipped with dust filters to keep your PC clean.
Cons:

  • Cable management can get tough.
Bottom Line BGW21 Pure Base 600 is the perfect case for builders who want a compact PC that runs absolutely quiet. The 2 pre-installed pure Wings 2 fans feature nine airflow-optimized blades for whisper-quiet operation.

Helpful Buying Tips!

Just because it is a small form factor ATX case doesn’t mean it won’t house the standard ATX components. When buying compact cases, you want to focus on the following:

  1. Build’s Components – If you already have the main parts of your build, you want to go for a case that is roomy enough to house them. Not a snug fit that will give you a tough building experience. Check the CPU height, GPU length, and PSU length.
  2. Case Build-Quality – Don’t be carried away with good looking cases that have been constructed with cheap materials. All-steel or aluminum cases offer the best chassis for durability.
  3. Expandability – Consider how easy it is to expand your system in the future. More drive bays and PCIe slots ensure that you can add some extra components to improve the performance of your system.
  4. Air Flow – Apart from going for a case with a roomy design, focus on the cooling options. Most compact ATX cases come with poorly designed fan/radiator locations. Some only pack less than two 120mm fan options. Ensure that your ideal case offers the best airflow to keep your system running cool.
  5. Cable Management – Just like airflow and interior space, also consider cable management. Go for the options that have cut-out spaces and cable routing channels.

Final Remarks

Buying your ideal small computer case doesn’t have to be an overwhelming undertaking. With the above cases, you should be able to find your ideal pick that will make a compact yet powerful PC build.

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