ASUS A21 Micro ATX PC Case

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84%
92%
Cable Management
89%
Airflow Efficiency
85%
Build Quality
90%
Interior Space & Compatibility
87%
Design Aesthetics
80%
Ease of Installation
88%
Cooling Solution Compatibility
70%
USB Ports & Connectivity
92%
Value for Money
75%
Customer Support
78%
Weight & Portability
83%
Long-term Durability
More

Overview

The ASUS A21 Micro ATX PC Case is a compact, mid-tower case designed to fit micro ATX motherboards. Offering a sleek, modern design, this case is ideal for building gaming PCs or general high-performance setups. It supports graphics cards up to 380mm in length and cooling solutions like 360mm radiators, ensuring your system stays cool even during intensive tasks. Available in a clean, white finish, this case blends style with functionality, featuring excellent airflow and a user-friendly interior layout. The A21 case provides a perfect balance between size and space, making it a great option for gamers and PC builders alike.

Features & Benefits

The A21 case comes equipped with BTF hidden connector technology that allows for clean cable management, keeping your build neat and organized. Its 40% porous front-panel mesh ensures a balance between airflow and dust filtration, allowing optimal cooling without sacrificing visibility for RGB lighting. With a 33mm-wide cable management compartment behind the motherboard, organizing cables is hassle-free. Additionally, the pre-installed, color-coordinated I/O cables add a touch of style and convenience. These features make the A21 Micro ATX PC Case an excellent choice for users who prioritize both performance and aesthetics.

Best For

This mid-tower case is best suited for gamers building mid-range to high-performance PCs. It offers ample space for large graphics cards and cooling components, making it ideal for users who want to build powerful systems without worrying about compatibility issues. The A21 case’s clean design and efficient airflow system are perfect for those who need a visually appealing, well-organized case. It’s also great for PC builders who appreciate easy cable management and customization options, ensuring that your build looks as good as it performs.

User Feedback

User reviews for the ASUS A21 Micro ATX PC Case have been overwhelmingly positive, with many praising its clean design and efficient cable management. The spacious interior is a favorite feature, as it comfortably accommodates large components, making it an excellent choice for high-end builds. However, some users have noted the absence of a front-panel USB-C port, which may be a downside for those looking for more modern connectivity options. Despite this, the overall sentiment points to a solid, reliable case with good airflow and ample room for customization.

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Pros

  • The spacious interior supports large components like 380mm graphics cards and 360mm radiators.
  • Efficient cable management is made easy with the 33mm compartment behind the motherboard.
  • The modern white design offers a sleek, clean look that complements most setups.
  • BTF hidden connector technology helps maintain a neat and organized build.
  • High airflow is supported by the 40% porous front-panel mesh, ensuring effective cooling.
  • The case is ideal for gamers and PC builders who need a balance of performance and aesthetics.

Cons

  • Some users have noted the lack of a front-panel USB-C port, which could be a drawback for modern peripherals.
  • The size of the case may be too large for users with limited desk space or those seeking a more compact build.
  • The case may not be well-suited for advanced custom cooling setups due to its air-cooling only design.
  • While visually appealing, the case's minimalist design may not appeal to users who prefer more distinctive aesthetics.
  • A few users mentioned that the cable management system could be improved for even better organization in tighter builds.
  • The case's weight, at 18.5 pounds, may be considered heavy for some builders or those frequently moving their setups.

Ratings

After analyzing verified user feedback across multiple platforms and languages, the ratings for the ASUS A21 Micro ATX PC Case reflect an overall positive sentiment, highlighting its design and performance. Spam, bot-generated, and incentivized reviews have been filtered out to ensure that only genuine, high-quality feedback is included. While most reviews emphasize strengths such as its cable management and spacious interior, some users noted minor downsides like the absence of a USB-C port. Overall, the scores present a balanced view of this mid-tower PC case's strengths and potential areas for improvement.

Cable Management
92%
Many users appreciate the clean cable management system, with the BTF hidden connector technology and dedicated compartment behind the motherboard. The ability to keep cables out of sight not only enhances the interior's appearance but also improves airflow, which is crucial for performance. Builders, especially those customizing their rigs, find it incredibly easy to keep their setup tidy and organized.
However, some users note that while the cable management compartment is a great feature, it can get cramped when using multiple large cables or accessories. Some found the compartment size to be restrictive when building complex systems with many components, requiring extra planning and effort to ensure everything fits comfortably.
Airflow Efficiency
89%
The 40% porous mesh front panel and thoughtful airflow design have earned high praise for keeping internal temperatures in check. Reviewers mention that the case's ventilation system ensures that both gaming and high-performance systems remain cool, even during extended use. Gamers and builders focused on performance appreciate this feature as it helps prevent overheating.
On the downside, a few users mentioned that the airflow could be improved with additional fan mounts or better placement options for advanced cooling setups. While the mesh panel is effective, some felt that the case could offer even more airflow flexibility for users with extreme cooling needs or high overclocking setups.
Build Quality
85%
The build quality of this mid-tower case is solid, with a sturdy structure that provides confidence in its long-term durability. Users comment on the quality of materials, especially the tempered glass side panel and the metal construction, which add a premium feel. The case is well-built, offering reliable protection for components during both installation and use.
A few users have pointed out that while the case feels sturdy overall, the exterior finish, particularly on the white version, can show fingerprints easily. Some also noted that the tempered glass side panel could be prone to smudges and scratches if not handled carefully, which may affect the case’s aesthetic appeal over time.
Interior Space & Compatibility
90%
The spacious interior of the A21 case allows users to easily fit large GPUs (up to 380mm) and even 360mm radiators. Many reviewers highlighted how comfortable it is to install high-end components without feeling cramped. This generous interior space makes it an ideal choice for those building performance-driven systems that require plenty of room for cooling solutions, multiple storage drives, and large graphics cards.
While the interior space is a major plus, a few users with smaller, more compact builds mentioned that the large size of the case can be overkill for simpler setups. Additionally, the case’s dimensions might be too large for certain setups where space is limited, leading some to look for smaller alternatives that offer a more compact build.
Design Aesthetics
87%
The clean and modern aesthetic of this mid-tower PC case appeals to users who value a sleek, minimalistic look. Many appreciate the white color option, which fits well with a variety of setups, especially when paired with RGB components. The simple yet elegant design creates a premium feel without being overly flashy, making it a great choice for users looking for a refined appearance.
Some users noted that the case's minimalist design might not be for everyone. Those who prefer more elaborate or unique designs may find the look too plain, and the lack of distinctive features might make it blend into the background for some users seeking a more eye-catching case.
Ease of Installation
80%
20%
Many users found the overall installation process easy, especially with pre-installed I/O cables and well-designed mounting options for components. The case’s modular design simplifies assembly, allowing for a quick build process without major issues. Newcomers to PC building appreciate this straightforward approach, as it reduces setup time.
However, some users mentioned that the lack of extra fan mounts or additional cable management features could make installation a bit challenging for more complex builds. While the overall design is user-friendly, those building custom cooling systems or requiring extensive cable management might need to make adjustments to accommodate all their components.
Cooling Solution Compatibility
88%
The case is well-suited for both air and liquid cooling, with enough room to accommodate a 360mm radiator and ample fan slots. Builders focused on cooling efficiency appreciate the options this case provides, particularly with the ability to install multiple fans in key areas. It's particularly appreciated for users aiming to push their systems to the limit in terms of performance while maintaining cool operating temperatures.
A small number of users feel that the cooling setup could benefit from better flexibility, especially for custom liquid cooling loops. While it supports larger cooling solutions, some felt the space could be optimized for advanced cooling configurations that require more specific or larger arrangements.
USB Ports & Connectivity
70%
30%
The case provides the necessary USB ports, including USB 2.0 and 3.0, ensuring compatibility with most peripherals. For standard gaming setups and office use, these ports suffice for most users' needs. It’s simple, functional, and doesn’t clutter the design with unnecessary features.
However, some users were disappointed by the lack of a front-panel USB-C port, which has become a standard on many modern cases. Those with devices that rely on USB-C for faster data transfer or charging noted this omission as a drawback, especially for a case in this price range.
Value for Money
92%
This mid-tower case offers great value for its price, particularly when considering the quality build, good airflow, and ample space for high-end components. Users feel that the combination of features, like cable management, airflow, and cooling compatibility, makes it a solid choice for gamers and PC builders without breaking the bank. The price point is seen as justified by the overall performance and design.
Some users feel that the value could be improved if additional features, such as USB-C or more flexible cooling options, were included. While the case offers excellent performance for most users, those seeking specific premium features may find it lacking in certain areas for the price.
Customer Support
75%
25%
Several users have reported positive experiences with ASUS' customer service, especially in terms of handling warranty issues or component replacements. The support team is seen as responsive and helpful when dealing with any product issues. For those who value after-purchase support, the assistance provided by ASUS is appreciated.
However, some users have had mixed experiences with customer support, citing slow response times or difficulty reaching representatives for assistance. A few also reported that certain replacement parts were hard to acquire or took too long to be processed, leaving them frustrated with the service.
Weight & Portability
78%
22%
The case’s weight is manageable for most users, and while it’s not the lightest, it strikes a good balance between sturdiness and portability. This makes it an acceptable choice for those who may need to transport their PC to LAN parties or gaming events. Overall, users find it decently portable given its size and structure.
On the downside, some users feel that the case could be lighter, especially those who need to move their rig frequently. It’s not the heaviest option available, but it’s definitely not the lightest either, and this can be a concern for people who prioritize portability.
Long-term Durability
83%
The case’s solid build quality and quality materials give users confidence in its long-term durability. Many note that after extended use, the case still performs well without signs of wear or degradation, even in demanding environments. The overall construction holds up well, and it continues to provide reliable protection for components.
While most users are satisfied with its durability, a few have pointed out that the white finish can stain or discolor over time, especially if exposed to dust or spills. Some feel that more robust material choices would have ensured even greater longevity, particularly for those who are hard on their PCs.

Suitable for:

The ASUS A21 Micro ATX PC Case is ideal for gamers and PC builders seeking a compact yet spacious case for high-performance builds. Its compatibility with large graphics cards (up to 380mm) and radiators (360mm) makes it a great choice for those building powerful systems with ample cooling. Additionally, its clean design and efficient cable management system cater well to users who prioritize aesthetics and a tidy setup. Gamers and PC enthusiasts looking for a functional, visually appealing case with room for upgrades will benefit from the versatile features offered by this case.

Not suitable for:

However, this case may not be the best fit for users with more limited space or those seeking a more compact build. The size of the case, while spacious, may be too large for those with smaller workspaces or minimalistic setups. Additionally, users who rely on front-panel USB-C ports may be disappointed, as this model lacks that feature. The case's design, while sleek, may not appeal to individuals seeking a more elaborate or unique aesthetic. Builders looking for advanced cooling options might also find the airflow features somewhat limited for high-end custom cooling setups.

Specifications

  • Case Type: Mid-tower design suitable for micro ATX motherboards.
  • Motherboard Compatibility: Compatible with micro ATX motherboards for custom PC builds.
  • Maximum GPU Length: Supports graphics cards up to 380mm in length.
  • Maximum Radiator Size: Supports up to 360mm radiators for enhanced cooling.
  • Cooling Method: Supports air cooling with a focus on efficient airflow.
  • Front Panel Mesh Porosity: The front panel has 40% mesh porosity for improved airflow.
  • Cable Management Compartment: Features a 33mm cable management compartment behind the motherboard.
  • I/O Cable Pre-installation: Comes with pre-installed color-coordinated I/O cables for easy setup.
  • Dimensions: Measures 19.49 x 11.42 x 20.35 inches in size.
  • Weight: Weighs approximately 18.5 pounds.
  • USB Ports: Includes 2 USB 2.0 and 2 USB 3.0 ports on the front panel.
  • Power Supply Compatibility: Compatible with ATX power supplies for reliable performance.
  • Front Panel Ports: Equipped with USB 2.0, USB 3.0, and audio jacks for easy access.
  • Design Color: Available in a clean white color with modern aesthetics.
  • Dust Filters: Includes dust filtration on the front panel to maintain airflow and cleanliness.
  • Airflow Design: Optimized for high airflow with a 40% porous front panel.
  • Storage Bays: Supports multiple storage devices with tool-less drive bays for easy installation.
  • Graphics Card Clearance: Clearance of up to 380mm for large graphics cards in gaming builds.
  • Cooling Support: Supports front, top, and rear fans for comprehensive cooling options.

FAQ

The ASUS A21 Micro ATX PC Case is a compact mid-tower case designed for micro ATX motherboards and gaming setups. It supports large components, including 380mm graphics cards and 360mm radiators, and offers a modern white design. The case also features efficient cable management, a 40% porous mesh front panel for improved airflow, and pre-installed color-coordinated I/O cables.

This case is designed with excellent cable management in mind. It includes a 33mm cable management compartment behind the motherboard and BTF hidden connector technology, making it easier to keep cables tidy and organized. This feature is particularly appreciated by users who want a clean build without a cluttered interior.

The A21 case supports air cooling only, with space for up to 360mm radiators in the front. It has a front panel with 40% mesh porosity, allowing for enhanced airflow and efficient cooling. This is suitable for most users building mid-range to high-performance gaming PCs but may not be ideal for users looking for advanced liquid cooling solutions.

Yes, the ASUS A21 case can accommodate graphics cards up to 380mm in length, making it well-suited for users with high-end GPUs. This spacious design is beneficial for gaming enthusiasts or professionals who require powerful graphics performance in their builds.

The ASUS A21 case has dimensions of 19.49 x 11.42 x 20.35 inches and weighs 18.5 pounds. While it's compact enough for a mid-tower, it may be considered slightly heavy compared to smaller cases, especially for users who frequently move their PC setup.

The case does not include a front-panel USB-C port. Some users have mentioned this as a downside, especially with the growing popularity of USB-C peripherals. However, the case still offers USB 2.0 and USB 3.0 ports for most common connections.

While the ASUS A21 case supports a 360mm radiator in the front, it's primarily designed for air cooling. The case does not provide the best layout for advanced custom water cooling systems, so users looking to build a custom loop may find the setup more restrictive.

Yes, this case is a great option for beginners due to its clean design and intuitive cable management features. The included color-coordinated I/O cables and the spacious interior make it easy for new builders to assemble a system without excessive hassle. However, some familiarity with basic PC building would be helpful.

Airflow performance is one of the strong points of this case. The 40% porous mesh front panel provides ample ventilation, ensuring that the internal components stay cool, even during intense gaming sessions or demanding workloads. Many users have praised the case for its efficient airflow system.

The ASUS A21 Micro ATX PC Case is ideal for gamers and PC builders who are constructing mid-range to high-performance systems. It's also great for users who prioritize aesthetics, cable management, and efficient airflow. The case is a good fit for those who need ample space for large GPUs and cooling solutions, but might not be suitable for those who need advanced water cooling options.