ASUS A21 ASUS CASE/BLK

Mini-Tower · mATX / ITX · GPU up to 380 mm

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Form factor Mini-Tower
Motherboard support mATX / ITX
GPU clearance 380 mm

ASUS A21 ASUS CASE/BLK is a mini-tower PC cabinet that takes mATX / ITX motherboards and graphics cards up to 380 mm long.

Specifications

Key specs

Form factor: Mini-Tower
Motherboard support: mATX / ITX
GPU clearance: 380 mm
Part number: 90DC00H0-B08000
EAN / UPC: 0197105365100

Design

Form factor: Mini Tower
Type: PC
Product colour: Black
Supported motherboard form factors: micro ATX, Mini-ITX
Number of 3.5" bays: 2
Number of 2.5" bays: 1
Number of expansion slots: 5
Cable management: Yes
On/off button: Yes
Maximum CPU cooler height: 16.5 cm
Maximum graphics card length: 38 cm
Maximum PSU length: 21 cm

Ports & interfaces

Audio input: Yes
Audio output: Yes
USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity: 2

View all specifications +3 more sectionsShow fewer specifications

Cooling

Number of front fans supported (max): 3
Front fans diameters supported: 120,140 mm
Number of rear fans supported (max): 1
Rear fans diameters supported: 120 mm
Number of top fans supported (max): 3
Top fans diameters supported: 120,140 mm
Front radiator sizes supported: 120,140,240,280,360 mm
Rear radiator sizes supported: 120 mm
Top radiator sizes supported: 120,140,240,280,360 mm

Storage

Supported HDD sizes: 2.5,3.5"

Weight & dimensions

Width: 220 mm
Depth: 465 mm
Height: 430 mm
Weight: 7.3 kg

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About this product

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.

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.

A21 ASUS CASE/BLK vs similar cabinets

	ASUS A21 ASUS CASE/BLK	COUGAR MX600 MINI	COUGAR MX600 MINI RGB	Chieftec BX-10B-M-OP Mini-Tower Case
Form factor	Mini-Tower	Mini-Tower	Mini-Tower	Mini-Tower
Motherboard support	mATX / ITX	mATX / ITX	mATX / ITX	mATX / ITX
GPU clearance	380 mm	380 mm	380 mm	380 mm
Released	—	2025	2025	—

Questions about the A21 ASUS CASE/BLK

What are the main specs of the ASUS A21 ASUS CASE/BLK?

Mini-Tower, mATX / ITX, GPU up to 380 mm.

What form factor is the ASUS A21 ASUS CASE/BLK?

Mini-Tower.

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