Choosing the smallest micro ATX case when building your PC is key for both budget and room considerations. A larger case provides more options for internal hardware, but it also comes at a higher cost.
If you need to reduce the cost of your build, opting for a smaller case will maximize savings without impacting performance. Additionally, when space is limited, a smaller size ensures that your system can fit in tight spaces without causing clutter.
From an aesthetic standpoint, having the smallest micro ATX case also creates a much more organized look while saving time on cable management. As a result, we’ve collected a list of the best smallest micro ATX cases for various PC building needs.
Our Top Picks: Best Smallest Micro ATX Cases
- Best Overall: Cooler Master MasterBox NR400
- Runner-up: Cooler Master MasterBox Q300L
- Best Cube Case: Thermaltake Level 20 VT
- Budget Choice: Thermaltake Versa H17
- Best for Gaming: Thermaltake Core V21
- Best Premium: CORSAIR CRYSTAL 280X RGB
Things to consider before purchasing a Smallest Micro ATX Case
Design
When it comes to Micro ATX Cases, not all cases are created equal. Features are always more essential than appearance. However, you may be extremely worried about the appearance of your PC case. As a result, before selecting the small Micro ATX case for you, you should clearly outline your criteria.
Micro ATX cases today come in a variety of design options from sophisticated and sleek to simple and pragmatic. But, the most important aspect of buying one of these PC cases should be the features offered.
Make sure to read about all the features associated with each case, including airflow, cooling capabilities, cable management, and size availability. With careful research and shopping around, your new Micro ATX case can redefine your home or business setup.
Airflow
When building a micro ATX case, airflow is an important factor to keep in mind. Selecting the right fan sizes and speeds for your system can ensure optimal ventilation for a longer PC life expectancy. If you want to keep your computer cool, look for a PC case that can accommodate additional fans.
PSU Options
Make sure to check the power supply unit (PSU) size of your case before purchasing it as the smallest micro ATX cases often tend to have more limited spaces than regular sizes. The most common PSU form factor is ATX, which has a depth of 140mm. It is usually found at the bottom of the case, and the drive bays next to it are frequently adjustable for easy wiring.
Consider the usage of these components and their positioning within the case before making any purchase decisions so that you get the most out of your case-build experience.
Cable Management
When building the smallest micro ATX case, make sure you have enough space for the necessary cables as well as any future additions or changes. Usually, manufacturers leave a separate compartment on the right for cable management.
Look for cases with special cutouts dedicated to providing extra room and ease of access to cables. Before making your purchase, consider making sure that you’ve done plenty of research and are aware of the specifics so that you can be confident in your decision when acquiring the right micro ATX case that is both functional and aesthetically pleasing.
Large GPUs Support
When building a PC for gaming or graphic design, you will want to select a powerful graphics card, which is usually large. If you’re looking for the smallest micro ATX case that still offers enough support for large GPUs, you should be sure to check out the range of options available.
Researching the manufacturer’s manual and specifications can help you determine which small micro ATX cases are compatible with your GPU, as well as provide valuable design and sizing details to help you make the right decision. It’s worthwhile to investigate each model and determine which smallest micro ATX case is the best fit for your system’s requirements.
Cooling Option
As much as we might want to pack the absolute most power into our smallest micro ATX cases, a good cooling system is essential for long-term PC health. Consider whether you require an air or liquid cooling system based on your hardware components and heat tolerances.
For the liquid cooling system, small micro ATX cases typically only support radiators up to 280mm (2x 140mm) or 240mm (2x 120mm). Research guidelines for your specific hardware can help give you an idea of what size and type of cooling system work best within the smallest micro ATX case.
After all, investing in a quality cooling system will ensure that your PC reaches its fullest potential.
6 Best Smallest Micro ATX Cases
1. Cooler Master MasterBox NR400
The Best Overall
Specs
PROS
CONS
The Cooler Master MasterBox NR400 is a great smallest micro ATX case for those looking for a simple and effective design.
The entire front panel is fine mesh for optimal ventilation and dust filtration. The I/O port located on the top of the case includes two USB 3.0 and an audio jack. Additionally, there is a magnetic dust filter at the top and bottom of the case to further ensure clean air circulation.
Cable management in the right compartment with four cutouts for cable routing. The left side panel can be removed with thumb screws to reveal a tempered glass window.
This smallest ATX micro case supports GPUs up to 346mm in length, and radiators for liquid cooling systems up to 280mm in size. If installing a radiator in the front panel, however, will reduce available GPU space.
The HDD cage on the bottom of the case can accommodate up to four 3.5″ HDDs. It can be moved forward to add space for a larger PSU, or backward to install a radiator. The maximum PSU depth can be 325mm when the HDD cage is removed and no radiator is installed at the front panel.
Additionally, this case supports up to four 2.5″ SSDs in both left and right compartments.
Overall, this PC case offers an elegant yet casual appearance for those seeking minimalism and functionality in their smallest micro ATX cases.
2. Cooler Master MasterBox Q300L
The Runner-up
Specs
PROS
CONS
The smallest micro ATX case on the market, the Cooler Master MasterBox Q300L, offers plenty of customization and performance options. It is designed to look good while keeping your hardware cool and secure, featuring three sides with perforations covered by magnetic dust filters.
Plus, its I/O ports can be positioned at the top, front, or bottom of the side panel. This PC case supports graphics cards up to 360mm in length and CPU coolers up to 159mm in height so you don’t have to worry about any components being too big for the case.
Radiator for liquid cooling systems can be installed on the front panel with a maximum size of 240mm for those who want a more advanced cooling system option. Cable management is located in the right compartment, behind the motherboard tray, and has 28mm of clearance for easy cabling. This area also hosts storage drives, including a 3.5″ HDD and two 2.5″ SSDs.
The edge-to-edge transparent side panels allow you to show off your chosen internal hardware design without compromising on airflow and efficiency, making this an ideal choice for those who want their PC powered through enhanced performance but still look aesthetically pleasing.
3. Thermaltake Level 20 VT
The Best Cube Case
Specs
PROS
CONS
This model follows the golden rule of “small footprint, big possibilities.” It is optimized for managing space and making way for a lot of components. It is that feature that has attracted the attention of a lot of hardcore gamers. The drive racks are removable and can be replaced with other suitable options.
When it comes to structuring, this smallest Micro ATX case is both appealing and practical. Its tempered glass panels are quite durable and more resistant to dust and scratches.
The ventilation system is quite optimal with the support of more than one fan. The best part about its ventilation system is that the model can handle a liquid cooling system.
4. Thermaltake Versa H17
The Budget Choice
Specs
PROS
CONS
The Thermaltake Versa H17 is a great choice for all entry-level PC gamers. If you don’t care about a high-end PC and consider gaming a hobby, then this is a great option. Many features make this smallest Micro ATX case a good choice.
This is the most appealing PC case model for those on a budget-conscious. You can easily purchase it without going overboard. Apart from that, the design facilitates flawless cable management. You will never have to worry about entangled wires or short-circuit hazards. The manageable wire system also ensures that the airflow remains unhindered. The pre-mounted PSU cover facilities the bottom area of the case to be used for managing the unused cables.
The Micro ATX case is AIO liquid cooling compatible and supports ample ventilation options. Aesthetic-wise, the manufacturers ensured a simple yet stunning design. The aluminum brushed-like front panel masks the extrusive drive devices. It provides an elegant yet simplistic appearance.
There are ample ventilation options for the current product. It also supports the latest PC hardware, along with high-end GPU options. The I/O ports are very accessible and can be easily approached whenever required.
5. Thermaltake Core V21
The Best For Gaming
Specs
PROS
CONS
Arguably, one of the best features of this Small Micro ATX case is that it can be combined with another V21 core for a dual system. It is a great option for gamers who prefer to build manual systems for flawless performance. The model allows a lot of customization for enthusiasts. It can be used in either vertical or horizontal orientation on the motherboard. Adjustments to the chassis can be made for the best viewing presentation.
At the bottom panel, there is a removable PSU dust filter. It ensures the proper cleaning of the inner system. The best part is that you can replace it with another dust filter model if the need arises.
Since the system allows for expansion, you can opt for more storage. The users can install six data storage devices. Even with the presence of a high-wattage PSU of 200mm, there is still a lot of space available. The designers have cleverly designed the Micro ATX to facilitate a cable management system, despite the heavy storage capabilities.
For facilitating the additional storage, the Micro ATX allows excellent thermal management, facilitating a lot of fans and radiators.
6. Corsair Crystal 280X RGB
The Best Premium
Specs
PROS
CONS
Corsair Crystal 280X RGB follows a unique cube design that doesn’t compromise either performance or style. It comes with three glass panels which you can thoroughly enjoy. Apart from that, the model also facilitates lighting control which can be a plus for those gamers who want to have a choice in that matter.
Two RGB fans that come mounted offer brilliant airflow. Note that you also have options for installing more fans in the rear and other sides for additional airflow. There is room for up to six 120 mm cooling fans. Apart from that, the design of this small Micro ATX case also supports three 240 mm radiators (one on the roof, one in the front, and one on the floor).
Design-wise, the three tempered glass panels are some of the best visually appealing choices that you can find for yourself. A dedicated storage compartment for drives is present. The design comes with built-in storage for two 3.5 inches drives and three 2.5 inches drives. You can keep your system clean without sacrificing your storage capacity. Filter-wise, the dust filters installed on the roof, floor, front, and PSU are incredible at keeping your system clean.
The only drawback with this model is mediocre temperature support. Apart from that, this Micro ATX case is quite pricey and not suitable at all for many people who want to go for a reasonably priced option.
Final Thoughts
There are a few great Micro ATX cases on the market to choose from whether you’re looking for budget-friendly, style, gaming capabilities, or premium features. We hope our roundup review helped you find the right one for your needs.
As always, be sure to consult professionals before making any final decisions. If you are still unsure, take some time to read other reviews and compare features.
In conclusion, the Cooler Master MasterBox NR400 is our pick for the best smallest Micro ATX case. Its stylish exterior and excellent thermal performance impressed us, as did its low price tag. If you’re looking for a more budget-friendly option, we recommend the Thermaltake Versa H17.
No matter which case you choose, make sure that it meets your specific needs in terms of size, features, and price.
