Smallest Micro ATX Case – Buying Guide

The smaller Micro ATX case must be cost-effective, ergonomic, and free of unwanted wirings. For Mini-ITX and Micro-ATX motherboards, a mid-level casing works perfectly with a little space to spare after everything has been installed. For the smallest micro ATX case, it must have an embedded cooling system that eliminates additional space needed for auxiliary liquid or fan cooling mountings.


Thermaltake Core V21

Thermaltake Core V21

  • Core V21
  • Dual chamber
  • Dedicated trays


CORSAIR Carbide AIR 240

  • Multiple Fans
  • Micro-ATX
  • Mini-ITX

Corsair iCUE 220T

Corsair iCUE 220T

  • Ventilated casing
  • Swift cooling
  • Mounting stands

Another aspect must be its dedicated space to accommodate lengthy and tangling cables. Getting rid of them by placing them in a devoted corner of your casing would clear much space for other components to be added. Most of the micro-ATX casing allow drive bays for external and internal HDDs, it improves storage capacity without sacrificing on size and space.

List of Best and Smallest Micro ATX Case

NameAlready SoldRatingPricing
Cooler Master MCB-Q300L-KANN-S003000+4.6
AeroCool Cylon RGB Mid Tower with Acrylic Side Window2000+4.5
Thermaltake Core V21 SPCC Micro ATX Cube6000+4.7
InWin 301 Black Tempered Glass Premium700+4.6
CORSAIR Carbide AIR 240 Micro-ATX2000+4.7
CORSAIR CRYSTAL 280X RGB Micro-ATX Case2500+4.6
Silverstone Tek Micro-ATX/DTX/Mini-ITX500+4.2
Antec Minuet 350 MicroATX Slim Case500+4.3
SilverStone Technology Ultra Compact Mini-ITX1000+4.6
Corsair iCUE 220T RGB Airflow Tempered Glass1200+4.7

Cooler Master MCB-Q300L-KANN-S00 MasterBox Matx Tower

Adjustable Panels

MasterMox Matx tower is a crystal clear and safest option for your customized PCs for gaming and office work. it is Cooler Master MCB-Q300L-KANN-S00 made with the sturdiest casing materials, errorless hierarchy, and complete support for additional components to be installed in the system. the Adjustable panels make it look better and ergonomic for heavy customization.

The smaller size and better connection options are a clear edge over its competitors. The input/output panels can easily be adjusted from all sides. Make your wires and board connections pass from six different locations, adjust them vertically or horizontally as per your motherboard specifications. The casing is made of steel and plastic materials and is effectively brushed to avoid rust accumulation and scratches.

Front Magnetic Design

The side panels are exclusively designed for breathability. It allows for heat dissipation, keeps away from dust and rust with special filters, and offers a full view of the inside circuitry. The edge to edge acrylic side panel allows cooling system LEDs to glow perfectly even if they are confined inside a protective case.

The dust filter adds great efficiency without damaging your components from the inside. The open perforated front, top, and bottom filters are backed by numerous minuscule pores to adjust heat content and creating a great look from the outside.

Clear the Clutter

Simply shelve your additional cables inside an extra space provided in the ATX casing. The casing is secured with a box behind the motherboard tray for hidden cable management. Clear the cables and avoid tangles by simply putting them inside the dedicated tray.

Cooler Master gives a clean and clear routing space for hidden cable management. It is the best available ATX casing for small form factor components. The dimensions are 370 x 370 mm for all the normal ATX PSU.

  • Steel and plastic casing materials
  • Adjustable for Micro- ATX and Mini- iTX
  • Dedicated tray for cable clearing
  • Magnetic dust filters for breathability
  • 6 adjustable I/O locations
  • Shipping charges apply
  • Latest versions available

AeroCool Cylon RGB Mid Tower with Acrylic Side Window, Black

Acrylic Side Windows

AeroCool Cylon can be the smallest Micro ATX case for compact gaming motherboard versions. It has adjustable AeroCool Cylon RGB Mid Tower with Acrylic Side Windowheight portions to support multiple heights up to 155mm at max. The acrylic side windows have numerous tiny pores for air and heat dissipation. The side windows are available in black and white for customization. The side windows are RGB-ready with multiple coloring modes and complete synchronization with the device.

Lighting Modes

The lighting modes and LED lighting strip is a great addition to the newer tower version by AeroCool. There are 7 solid color modes with adjustable brightness options and 6 RGB flow lighting modes to make your gaming more fun. There is a total of 13 lighting modes mounted to the front of a PC case with adequate color strength and long-lasting performance to make your buy worth it.

The mid-tower ATX case can be synced accordingly with the radiators and liquid coolers. Adjust your lighting flow inside the motherboard and auxiliary cooling system with the outside more conveniently, and for a coherent illumination when gaming.

Self-Cooling and Support

The ATX and iTX case cools itself with dedicated space available to the front and top of the panel. There’s a top panel 120mm cooling fan to regulate the airflow when overclocking in heavy-duty gaming systems. A 240mm radiator is mounted on the front panel for an extravagant cooling performance coupled with the cozy LED lighting.

The dual fans and liquid cooling support makes it possible to insert graphics cards up to 371mm with high-end and lag-free working. The tower case supports VGA fan bracket design with dual 120mm fan space and heat sink capacity for VGA cards. The ventilation performance has been maximized with vast customization options inside the case.

  • Multiple I/O port inclusions and support
  • Supports top and front panel cooling
  • Multiple LED modes
  • Full Acrylic side windows
  • A bit costly
  • Tricky design for component insertion

Thermaltake Core V21 SPCC Micro ATX Cube 

Multi-Oriented Case

Thermaltake Core V21 is a multi-oriented cube-shaped casing for high-end gaming PCs and motherboards. It is fullyThermaltake Core V21 SPCC Micro ATX Cube Computer Chassis compatible with all the PC types, including the motherboards, auxiliary cooling units, and processors. The motherboard can be placed in both the horizontal and vertical orientation for the better viewing angle and adjusted accordingly by its flexible steel walls and breathable side windows.

The removable PSU dust filter is a cutting-edge solution to flick off the accumulated dust if any. The dust filter is placed to the bottom and can be removed without unboxing the whole casing. There are additional rubber gaskets placed on the PSU bracket to cancel out the unwanted noise and vibrations when the system is working at its full capacity.

Augmented Cable Management

The cable management system is engineered following absolute safety and ergonomic standards. Clear the clutter with dedicated lanes and a chamber for stray wires for accommodation. There are two chamber divisions in the Thermaltake Core V21 model, the lower chamber is for PSU and unwanted cables. The lower chamber houses a dedicated tray for unwanted long cables without making the see-through casing unattractive.

In the drive bays, stack your unwantedly long cables coming out of your system components or use the dual drive bay for expansion by adding 2.5” or 3.5” drives to the racks in the same space. The drive bays are placed at the right place for maximum cooling efficiency.


The side windows are made of dual-layered pore openings for maximum cooling. The motherboard and corresponding components won’t overheat at all at overclocking modes and workstation applications with an intuitive breathable design by Core V21. The pre-installed 200mm boosts the cooling process, worry no more about installing an auxiliary cooling radiator fan or liquid cooling system with an embedded cooling fan on your system casing.

The ventilation system allows the installation of two more fans to its front, one at the rear, two to its bottom, and up to four 120mm fans to the bottom. Before customizing your motherboard, make sure to consider the flexibilities and expansions provided by Core V21, play smart by saving your space and cost with Thermaltake casing.

Installation Compatibility

The installation compatibility is vast in a compact case. There are three hidden HDD racks available for expansion, install 3.5” and 2.5” HDDs in the bottom racks or clear unwanted cables out of sight by placing them right to the bottom.

The form factor compatibility includes Mini ATX, Mini iTX, and ATX motherboards. The dimensions are cube-shaped that add more options to users. The port compatibility includes 2x USB 3.0 ports, HDMI port, HD Audio, Power Button, Reset buttons to the side and front of the panel for ease.

  • Core V21 supports vertical and horizontal placement
  • Dual chamber design
  • Clears enough space for future expansion
  • Dedicated trays for HDD installation
  • Built-in 200mm fan installed for ventilation
  • Limited I/O ports
  • Only available in limited color range

InWin 301 Black Tempered Glass Premium 

See-Through Sturdy Panel

InWin 301 is a first of its size and compatibility in the series. The towering structure is vastly compatible with Mini- InWin 301 Black Tempered Glass Premium Micro-ATX Mini-ITX Tower Gaming Computer CaseiTX and Micro-ATX gaming motherboards with a lot more to offer in expansions and build. The panel is carefully designed and perfectly engineered for a gloomy outlook. It is simply amazing when running inside a gaming lounge. The see-through tempered glass to the side panel sheds enough weight and provides a stunning look of the inside.

The steel panel is strong enough to absorb shocks, cancel out the vibrations produced inside the panel with its 1.2mm thick panel. The steel panel is brushed for anti-scratching capacity. It will take a lifetime to make it look unattractive. The tempered glass has a screw-less design, simply press the button and the glass will come out. The 301 case keeps the system stable from vibrations with its dual bottom stands.

Spacious Build

The build is vast and expandable. The interior is spacious enough to accommodate all the stray cables, makes room for more HDD and large-sized VGA cards, auxiliary air cooling and liquid cooling systems. the mini towered structure allows 4 PCIe slots inside it, 2x USB 3.0 I/O ports, and an HD Audio port insertion. Users can add 2x 2.5” HDD and a single 3.5” or 2.5” HDD inside the casing.

Maximum Compatibility

The compatibility is improved with a towering structure. The mini-towered design allows VGA card up to 330mm length, a 160mm Heatsink housing, dedicated racks for long cables and HDDs installation, and multiple I/O port openings.

The motherboard compatibility includes ASUS, MSI, Gigabyte, and ASROCK motherboards in Miro-ATX and Mini-iTX form factors.

  • See-through glass build
  • 1.2mm steel structure
  • LED I/O display panel
  • Supports multiple fan sync
  • Looks expensive
  • Limited usage with no embedded fan installed

CORSAIR Carbide AIR 240 Micro-ATX and Mini-ITX 

Intuitive and Ergonomic

CORSAIR Carbide is an ergonomic and sturdy casing solution for your Mini-ITX and Micro-ATX motherboards. It is  CORSAIR Carbide AIR 240 Micro-ATX made spotlessly for elevated gaming and overclocking needs. The asking price is well under the range for all the gamers owing to its maximum compatibility, out of the box design, and tool-free structure.

The cooling performance is maximized with the dual-sided airflow design. You can always rely on three medium-sized built-in fans for a perfect and breathable action when gaming hard and fast.

Tool-Free Panel

The tool-free panel is backed with the see-through front window and side windows, both are equipped with exhaust fans pre-installed for reliable operation. Easily add or remove components without needing any screws. Simply press the button and the casing will be cleared of the glass window to add and expand your system specifications.

The bottom rack comprises spacious drive bays for a hassle-free and tool-free addition and removal of HDDs. There are two racks for 1x 3.5” and 2x 2.5” HDD and enough space to clear the clutter to the backside.

Direct Airflow Cooling

There’s space for maximum airflow provided by three built-in fans to the top, bottom, and front. the fans are assisted by dedicated space for air and liquid cooling systems and side windows for natural airflow. There’s no need to include auxiliary cooling when you have a multi-fan direct airflow system. The integrated fans are placed at a critical position where heat is generated most.

Installation Compatibility

The installation is incredibly simple. The tool-free installation and dedicated compartments for hard drives make it handier for customization after you’ve installed the motherboard inside. The CPU backplate cutout is specifically made for post-installation customization without disintegrating the whole CPU. it allows installing an additional cooler system or adding a drive to the back panel.

  • Multiple pre-installed fans and airflow system
  • Transparent front for glowing overview when gaming
  • Mini-ITX and Micro-ATX compatible
  • Ergonomic design
  • Tool-free post-installation customization
  • Extra space for additional hard drives
  • Does not support systems larger than Micro-ATX
  • Expensive product for mid-range gamers


Flawless Design

If you are looking for the most reliable and best Micro-ATX and Mini-ITX case for your gaming system with  CORSAIR CRYSTAL 280X RGB Micro-ATX Caseeverything cleaned up and managed with the best and most ergonomic design, CORSAIR Crystal 280X is the best pick. It is made with a dual-chambered design, one for the show-off and other for all the untidy things to save.

It is made with the best resources possible, tempered glass to the three sides, space for six 120mm or three 240mm fans, LED lighting and software support for the components control, monitoring, and LED color mode customization.

Integrated RGB Fans

There is a room of up to six 120mm auxiliary fans to all the sides of the cooling case and motherboard. install either 3x 240mm fans to the top, bottom, and side or 6x 120mm fans in the same dedicated spacing. The included fans are illuminated with 16m RGB lightings. The CORSAIR LL 120mm RGB fans are PWM controlled with LED mounting on top of them. They run on the full-speed and zero-RPM mode by pulse width modulation technology and stay resilient in overclocking modes.

RGB Lighting

The RGB lighting is mounted to the front of both the 120mm CORSAIR fans. They look spectacular when gaming in dark rooms. A total of 32 LEDs are installed on fans with full control through the Lightning Node Pro digital RGB lighting controller. Add and edit colors and brightness modes with CORSAIR iCUE software in a blink and game on your terms.

Dual-Chamber Assembly 

The casing looks bulky with dual-chamber design. Still, the casing looks best when the CPU is fully functional for its clean and clutter-free look. It allows user maximum view of the inside circuitry and motherboard light show. The breathable pores to the front and backside ensure maximum airflow throughout its operation. CORSAIR allows tool-free customization to the system and has dedicated storage assembly due to its spacious build and enough room to accommodate everything inside without trouble.


Never mind adding another HDD to the system without opening up the entire system. simply press the button on the bottom, clear space and add your hard drive to the dedicated rack. The HDD tray allows the installation of 2x 2.5” and 1x 3.5” HDDs without scratching the motherboard. No need to modify the entire system if needed, users can always add chunks of additional storage instantly.

  • Classy and transparent outlook
  • 2x RGB lighted integrated CORSAIR fans included
  • Dual chamber design for show-off and sparkling view
  • Direct airflow cooling
  • Three-sided tempered glass
  • Controllable lighting
  • Expensive ATX and ITX casing
  • Not recommended for low- & mid-range gamers

Silverstone Tek Micro-ATX/DTX/Mini-ITX Aluminum

Strong Design

Silverstone is the predecessor of the impressive Sugo series micro-ATX, Mini-ITX, and DTX casing. It houses a great Silverstone Tek Micro-ATX/DTX/Mini-ITX Aluminumbuild, starting from the impressive aluminum front to the all-steel body brushed and shined for a diversified look. Silverstone Tek SG10 is made with a thick aluminum frame to the front and a complete steel body for improved sturdiness and long-lasting performance without scratches and deformities over years of rough usage.

The filters are breathable and easily removed if the need for a repair or dust cleanup. To the inside, the micro-ATX casing is vast enough to accommodate the motherboard’s essential and auxiliary components without messing up with the cables. The system will stay clean and organized throughout with dedicated lanes and clutter-free compartments inside.

Built-In Fan Build

For airflow optimization and to keep the system cool, up and running, Silverstone comes up with a dedicated 180mm air penetrator for maximum airflow. The airflow radiator allows an adequate heat flow from the inside to the outside environment. The maximum fan speed capacity is 1200 RPM at full speed. Along with the built-in air filters and an integrated fan for cooling, there are multiple spacings available to the front and sides of the casing for VGA cooling and motherboards.

The PSU air intake is allowed up to 1000W, thanks to the strider plus for great compatibility in overclocking modes.

Miniscule & Diverse 

Silverstone SG10 is small and highly effective for Small Form Factor builds. The case is compatible with all the Mini-ATX, DTX, and Micro-ITX systems without compatibility and size issues. The boxing is large enough to utilize dual video cards up to 13” in height and width. The total height of the CPU casing is 165mm, yet it measures 23L only.

  • Best and affordable design for medium gamers
  • 7mm front aluminum frame and steel body
  • Breathable structure with a built-in fan
  • Multiple spacings available for additional fans
  • Drive bays included
  • Not fit for pro-gaming
  • Limited component installation capacity

Antec Minuet 350 MicroATX Slim Case Computer Case 350

High-power Design

Minuet Antex 350 features an intuitive design and a great feel for hardcore gaming. It is specifically designed for Antec Minuet 350 MicroATX Slim Case Computer Casemini-desktop setups and blends perfectly with horizontal and vertical- type motherboards. The design is ergonomic, tool-free, and easy to pack and unpack. The build is made to deliver up to 350W of power supply to the system. The computer case is made of aluminum front and steel backing for a powerful feel and extravagant look. 80 PLUS certification marks a stamp on its credibility, competitiveness, and sturdiness. It has an Active PFC for bill management and greater efficiency when the system is run on continuous modes.

If you are looking for a small-chassis desktop case for horizontal or vertical setup, the Antec Minuet 350 is the choice. It fits all the Mini-ITX and Micro-ATX systems with ease and a great deal of additional space for wire routing inside the system, dedicated trays for external hard drives, and ports for external connectivity.

Tri-cool Fan Technology

Minuet 350 offers tri-cool fan technology for its hardcore gaming. It has total dimensions 3.8” x 12.8” x 16.8” that fits exactly to a spacious PC for mini and micro CPUs. There’s an 80mm tri-cool fan mounted on the top panel. It controls up to 3-speed modes with the novel PWM technology. For a horizontal setup, the top panel becomes a ventilating side with pores to the sides and back of the aluminum frame.

The cooling pores allow special air ventilation to the CPU, its VGA cards, and related circuitry. The control buttons, connectivity ports are placed to the front portion for easier access.

Compatibility and Support

The casing is compatible with all the Ryzen series mini-ITX and all size of the best for ryzen motherboards including 9-3900x.. It has multiple ports and modules for attachment along with dedicated drive bays, and compartments for auxiliary fans installation. The VGA card can be placed in the system without creating a mess with wires and other components. There’s no need to tighten screws, simply flip up the top portion of the casing and install the components right away.

The compatible drive bays include a 5.25” external HDD, 1x 3.5” external HDD, and 1x internal 3.5” HDD. The front ports include 2x USB 3.0, 2x audio jacks, and 1x eSATA insertion port in total.

  • Compact design
  • Tri-cool fan technology
  • Screw-free detachable top panel
  • Three drive bays for external and internal mounting
  • An 80 PLUS 350W power supply
  • Outdated design
  • Not enough airflow

SilverStone Technology Ultra Compact Mini-ITX

Dual Build

Silverstone Technology Ultra Compact casing is made with a dual structured design. for overclocking and high-end SilverStone Technology Ultra Compact Mini-ITX Computer Case gaming needs, switch to the highly ventilated portion and an airy feel and heatless processing throughout the long gaming sessions. For normal usage, you can always switch back to the solid model for less noisy and calm operation.

The dual color modes are designed to match the gaming PC with room settings. They come with textures and brilliant aspects, shiny, and classy looks. Choose from all-black or a black and white combo including the latter color for panels.

Sturdy Configuration

The build is strong enough to support heavyweights. The inner casing is isolated from the motherboard to prevent short circuits. The case is built with a complete steel casing with laminated brushings and perfectly engineered vents for maximum airflow.

The airflow spacings are kept for all the sides, the most spacious one is to the front having an embedded front-facing fan operation for cool and calm working. Silverstone supports 1x 120mm or 140mm single fan all-in-one liquid cooler to ventilate critical components including VGA cards, HDDs, and motherboard.

Maximum Clearance

The build is eclectic and fits ATX power supplies up to a total of 150mm length, long wires with clutter-free performance, and multiple fans for cooling. The supported power supplies are Mini-ITX, DTX, and Micro-ATX configurations. For customized gamers, an SFX power supply can also be used with a separately available official adapter by Silverstone.

There’s an additional space for three drives installation. It includes 1x 3.5” HDD, 1x 2.5” HDD, or 3x 2.5” HDDs. The CPU cooler can be used with components up to 82mm tall with a maximum clearance space available for components up to 61mm.

Supreme Airflow Rate

The airflow rate is awesome for heavy gaming and overclocking modes. There’s a dedicated 120mm – 140mm space for a singular fan to the front panel along with enough clearance space to install VGA cards and other components inside the system. if 140mm fan is used in the casing, it will reduce the clearance capacity of large VGA cards.

  • Dual panels for gaming and regular usage
  • Multiple color choices
  • Enough clearance space for large VGA cards
  • Compatible with Mini-ITX and Micro-ATX
  • Dedicated drive bays, cable clearance, and external ports
  • 2x USB ports only
  • Placed only in horizontal mode

Corsair iCUE 220T RGB Airflow Tempered Glass

Smart Build Ergonomic Design

CORSAIR had always been the forerunners in producing the best and smallest Micro ATX cases in their  Corsair iCUE 220T RGB Airflow Tempered Glassmanufacturing capacity. Starting from the improved design, spacious build, and 4D ventilation, everything seems perfect in the asking price. The towered build is for heavy-duty operations, which includes pro-gaming and workstation modes.

The CORSAIR 220T build is among the finest and sturdiest in the market. They have always been the best in structural warranty and compatibility with most of the form factors. The solid steel construction is drilled with openings for natural airflow along with the dedicated fans for heat exhaustion.

High Vent Action

220T offers complete ventilation for its high-spec casing structure. There are three embedded fans to the front panel, each laminated with 8 RGB lights attached to a strip. The fans are controlled by PWM technology with active control via software. The iCUE software monitors and controls heat dissipation and RPM speed of fans in real-time on the PC screen.

All the three fans are 120mm in diameter with direct contact with the critical PC components including a VGA card and HDDs. Install multiple cards and ports, HDDs to be used inside the system.

Light Up & Control

Light up the system and run your desired brightness and color levels with full control through the iCUE integrated app. The app can be used on PC and smartphones. It controls 16.8 Million RGB lighting combinations along with temperature monitoring and fan speeds.

See-through your PC casing with an edge-to-edge tempered glass side window casing. The side casing panel will showcase the designed components enough for an appraisal from a gaming mate.

  • Highly ventilated casing
  • Three pre-installed CORSAIR P120 fans for swift cooling
  • Meticulous design and striking looks
  • Mounting stands included
  • See-through glass window
  • Too big for usual gamers
  • A bit overpriced


Before clicking the BUY button on Amazon for your favorite air-cooled CPU casing, here are a few additional tips to improve your buying experience. Make sure to check warranty terms and conditions from the manufacturer before buying the casing firsthand. Secondly, always check for organic user opinions in the reviews section. Reading a few will clear it for the required product, or there aren’t any reviews available, believe in our words and buy it unanimously.

Always make sure you needed an extension or not in the coming months or years? If not, go for a smaller, budgeted one or buy an all-out big-sized CPU casing for the next few years if it’s staying a bit longer with enough room for expansion. The leading brands charge more than the better equipped little known manufacturers. It is better to buy lesser-known ATX casings with positive reviews and warranty included. It will save enough bucks to buy a few additional components to speed up your gaming system.