ASUS A21 PLUS TG Black Case - 90DC00H0-B19000

ASUS A21 PLUS TG Black is a compact Middle Tower case for Mini ITX and Micro ATX configurations, aimed at tighter but serious gaming and work PCs. It combines tempered glass with good airflow and solid fan support. The included 4 fans save you costs and time on additional assembly. The internal space allows for a serious graphics card up to 380 mm and a CPU cooler up to 165 mm, making it quite flexible for various builds.

What you get

With this case, you can comfortably plan for a more powerful graphics card without wondering if it will fit – 380 mm length covers most modern models. The allowable height for an air cooler 165 mm opens options for more serious tower coolers without going into low-profile compromises. The configuration with up to 3 x 120 / 2 x 140 mm in front, another 3 x 120 / 2 x 140 mm on top, and 1 x 120 mm at the back gives you good control over airflow – front for intake, top for exhaust, and rear for blowing out behind the CPU area. The built-in 4 fans are sufficient for a starter build; later you can upgrade according to the hardware and temperatures. For storage, you have 1 x 2.5" for SSD and 2 x 2.5"/3.5" combo slots, allowing you to easily combine a fast system SSD with one or two larger drives for games, projects, or media.

• Case format Middle Tower with support for Mini ITX and Micro ATX motherboards, suitable for compact but powerful systems.
• Front and top panel supporting up to 3 x 120 mm or 2 x 140 mm fans, plus 1 x 120 mm at the back for balanced airflow.
• The package includes 4 included fans, allowing you to build a working setup with adequate cooling right out of the box.
• Side panel made of tempered glass, so you can see the hardware and showcase RGB or clean cable management.
• Support for a graphics card up to 380 mm and CPU cooler up to 165 mm, providing freedom in choosing GPU and air cooling.
• Total of 5 expansion slots, sufficient for a standard GPU and additional cards like capture, sound, or network.
• Storage configuration with 1 x 2.5" and 2 x 2.5"/3.5" Combo Bay, allowing flexible combination of SSD and HDD according to needs.
• Front I/O panel with 2 x USB 3.2 Gen 1 and HD Audio for quick access to peripherals and headphones/microphone.
• Support for power supplies up to 210 mm, with the case coming without a power supply, so you can choose a PSU according to your build.

Who it is suitable for

ASUS A21 PLUS TG Black is a good foundation for gaming or work Micro ATX builds, where you want a combination of decent airflow and visible hardware through the glass panel. It is suitable for systems with longer GPUs and bulkier air coolers, without moving into a large Full Tower. If you are looking for many 3.5" slots for NAS or massive storage solutions, the space here is more limited.

The most meaningful aspect of this case is the balance between compact dimensions, real internal capacity, and solid fan support, plus the fact that right out of the box you get 4 fans and a glass panel ready for a clean, organized build.