ASUS A21 Case
The ASUS A21 micro-ATX case offers support for 360 mm radiators, and 380 mm graphics card, with two color options and clean cable management.
- Broad Compatibility: A21 supports up to 360 mm radiators, graphics cards up to 380 mm in length and CPU air coolers up to 165 mm in height.
- Capable Cooling: The front-panel mesh is 40% porous to maximize the balance of airflow, dust filtering and RGB visibility.
- Ample cable management: The A21 provides a compartment behind the motherboard that is 33 mm wide to keep your wiring tucked away and tidy.
Compare
ASUS
A21 Case
Discover Hidden Potential
The ASUS A21 is a PC case crafted for minimalist mainstream DIY PC builders, with support for a variety of AIO coolers and graphics cards, and plenty of airflow potential to keep things running smoothly.
Broad Compatibility
Despite being a micro-ATX case, the A21 still supports up to 360 mm radiators, graphics cards up to 380 mm in length and CPU air coolers up to 165 mm in height, giving builders plenty of options to assemble their next PC.
Support
-
360mm
Radiator
-
380mm
Graphics Card Length
-
165mm
CPU Cooler Height
Capable Cooling
The front-panel mesh of the A21 is 40% porous to maximize the balance of airflow and RGB visibility. Users can add up to three 120 mm fans to this section of their build to solidly manage system temperatures.
40 % porosity
Ample Cable Management
The A21 provides a compartment behind the motherboard that is 33 mm wide to help you keep your wiring tucked away and tidy.
Color-Coordinated Builds
Both variants of the A21 come with color-coordinated black or white internal I/O cables to compliment your build theme.
Recommend for you
- Support GPU up to 338mm in length
- Quasi-filter mesh panels
- Industry-leading spatial efficiency
- Tool-free side panels
- 32 mm wide cable-management
- Front panel USB Type-C® support
See less
- Support GPU up to 338mm in length
- Industry-leading spatial efficiency
- Tool-free side panels
- 32 mm wide cable-management
- Front panel USB Type-C® support
- Color-matched cables
See less
- Support GPU up to 400mm in length
- Dual Chamber Chassis
- Panoramic View
- Front Panel High-Speed USB Type-C
- Tool-Free Side Panels
- Aura Sync
See less
Support GPU up to 320mm in length
ASUS TUF Gaming GT301 ATX mid-tower compact case with tempered glass side panel, honeycomb front panel, 120mm AURA Addressable RGB fan, headphones hanger and 360mm radiator support.
See less
NEW
- Support GPU up to 360mm in length
- Enhanced Rigidity for Graphics Cards
- UL-certified power cable delivers 15 amps
- Mesh side panel improves thermal performance
- 20Gbps USB Type-C port
See less
NEW
- Support GPU up to 360mm in length
- Enhanced Rigidity for Graphics Cards
- UL-certified power cable delivers 15 amps
- TG side panel offers a harmonized view
- 20Gbps USB Type-C port
See less
NEW
- Naturally crafted wood materials with FSC certification
- Air superiority with unique dual 160 x 32mm front ring fan blades
- Mesh side panel improves thermal performance
- Left-side panel lock mechanism prevents intrusion
- Power and Reset button lock and two-section PWM control
- Integrated Rear Cable Clips keep system wiring tidy and clean
See less
NEW
- Naturally crafted wood materials with FSC certification
- Air superiority with unique dual 160 x 32mm front ring fan blades
- Metal side panel creates a clean look
- Left-side panel lock mechanism prevents intrusion
- Power and Reset button lock and two-section PWM control
- Integrated Rear Cable Clips keeps system wiring tidy and clean
See less
NEW
- Naturally crafted wood materials with FSC certification
- Air superiority with unique dual 160 x 32mm front ring fan blades
- Semi-transparent film TG side panel offers a harmonized view
- Left-side panel lock mechanism prevents intrusion
- Power and Reset button lock and two-section PWM control
- Integrated Rear Cable Clips keep system wiring tidy and clean
See less
NEW
- Supports GPUs up to 440mm in length
- Naturally crafted wood materials with FSC certification
- Air superiority with unique dual 200 x 38mm front ring fan blades
- TG side panel unveils the personalized essence
- Power Lock Latch and 2-section PWM control
- Front Panel IR Dust Indicator
See less
NEW
- Supports GPUs up to 440mm in length
- Naturally crafted wood materials with FSC certification
- Air superiority with unique dual 200 x 38mm front ring fan blades
- Metal Side Panel provides cooling efficiency and higher durability
- Power Lock Latch and 2-section PWM control
- Front Panel IR Dust Indicator
See less
NEW
- Support GPU up to 420mm in length
- Dual-Chamber Chassis
- 270° Panoramic View
- Front Panel USB Type-C®
See less
- IP68 water and dust resistance
- MIL-STD-810H 516.8 drop resistance
- NVMe & SATA dual interface
- Q-Latch DIY-friendly design
- USB-C ® 3.2 Gen 2x1
See less
- Advanced FDB bearing with 76 CFM high airflow
- Double layer LED array
- Black and white editions
- 2mm anti-vibration pads
- Aura Sync
See less
- Advanced FDB bearing with 76 CFM high airflow
- Double layer LED array
- Bundled ARGB hub enable exclusive lighting modes
- Black and white editions
- Aura Sync
See less
Intel® Z790 (LGA1700) ATX Gaming motherboard, Advanced AI PC ready, 16+1 DrMOS power stages, PCIe® 5.0, DDR4 memory, four M.2 slots, WiFi 6 and Intel 2.5 Gb Ethernet, HDMI®, DisplayPort™, USB 3.2 Gen 2x2 Type-C®, front USB 3.2 Gen 2 Type C, SATA 6 Gbps, Thunderbolt™ 4 header and Aura Sync RGB lighting
See less
- Extra-thick 28mm frame
- Quietly operates at 21 dB(A)
- 20 Addressable RGB LEDs
- Dual-sided frame lighting
- PWM control
- Aura Sync compatible
See less
- Extra-thick 28mm frame
- Quietly operates at 23 dB(A)
- 20 Addressable RGB LEDs
- PWM control
- Dual-sided frame lighting
- Aura Sync compatible
See less
- Extra-thick 28mm frame
- Quietly operates at 21 dB(A)
- 20 Addressable RGB LEDs
- Dual-sided frame lighting
- PWM control
- Aura Sync compatible
See less
- Extra-thick 28mm frame
- Quietly operates at 23 dB(A)
- 20 Addressable RGB LEDs
- Dual-sided frame lighting
- PWM control
- Aura Sync compatible
See less
ASUS ThunderboltEX 5 Expansion Card : Dual Thunderbolt™ 5 USB‑C ports, DisplayPort™ 2.1, PCIe 4.0 x4 Interface
See less
- Connect up to six case fans
- PWM fan and RGB connection
- Visible power and operation indicators
- Simple magnetic mounting
- Dual SATA power connector
- Two safety fuses
See less
- Extra-thick 28mm frame
- Hydraulic Bearing
- PWM control
- Aura Sync compatible
See less
ASUS USB4 PCIe Gen4 Card, dual USB4® ports (USB-C®) ports, DisplayPort™ 1.4, PCIe® 4.0 x4 interface
See less
- Products certified by the Federal Communications Commission and Industry Canada will be distributed in the United States and Canada. Please visit the ASUS USA and ASUS Canada websites for information about locally available products.
- All specifications are subject to change without notice. Please check with your supplier for exact offers. Products may not be available in all markets.
- Specifications and features vary by model, and all images are illustrative. Please refer to specification pages for full details.
- PCB color and bundled software versions are subject to change without notice.
- Brand and product names mentioned are trademarks of their respective companies.
- The terms HDMI and HDMI High-Definition Multimedia Interface, HDMI trade dress and the HDMI Logos are trademarks or registered trademarks of HDMI Licensing Administrator, Inc. in the United States and other countries.