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White mid-tower case with tempered glass side panel and black accents

ASUS

ASUS A21 Mid-Tower PC Case Light & Shadow White

SKU CH-H52N-AYMBC

A mid-tower case for Micro-ATX and Mini-ITX boards with rear-mounted motherboard support, tempered glass side panel, and 360 mm radiator capacity

  • Supported motherboard sizesMicro-ATX Mini-ITX
  • Housing materialSteel,Tempered Glass,Plastic
  • Front panel ports2 × USB 3.0 (5 Gbit/s) 1× headphone jack 1 × microphone jack
  • Product colorWhite
  • Supports Micro-ATX and Mini-ITX boards including rear-mounted layouts
  • Fits graphics cards up to 380 mm and CPU coolers up to 165 mm
  • Front and top radiator mounts accept up to 360 mm units
  • Two front USB 3.0 ports plus audio jacks for quick peripheral access
  • Tempered glass side panel on a 7.3 kg steel frame with 33 mm cable routing space

Mid-Tower Case for Micro-ATX Builds

The ASUS A21 is a mid-tower chassis designed for Micro-ATX and Mini-ITX motherboards. It features a Light & Shadow White finish with steel construction and a tempered glass side panel. The case supports rear-mounted motherboard layouts including MATX and YTX form factors. Front I/O provides two USB 3.0 ports plus separate headphone and microphone jacks.

Builders Who Want Compact Liquid Cooling

This case suits builders planning a 360 mm or 280 mm radiator in the front or top positions. It also fits graphics cards up to 380 mm long and CPU coolers up to 165 mm tall. Buyers who need more than two 3.5-inch drives or a third 2.5-inch bay should look elsewhere. Systems requiring ATX or E-ATX motherboard support are not compatible with this chassis.

Straightforward Assembly With Cable Room

Installation is simplified by 33 mm of rear cable management clearance and pre-installed dust filters at the top and bottom. The case offers five PCIe slots and supports power supplies up to 210 mm in length. Fan mounts accept 120 mm or 140 mm units at front, top and rear positions. Radiator brackets cover front, top and rear for flexible liquid-cooling loops.

How it compares

Measured against everything we stock in Tower & Desktop PC Cases, at today’s prices. Recalculated every night.

Price $512.99
Pricier than about 89% of the 1,468 comparable items (median $100.99).

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Specifications

Product
Brand nameASUS
Product colorWhite
Ports & slots
Front panel ports2 × USB 3.0 (5 Gbit/s)
1× headphone jack
1 × microphone jack
Size & build
Housing materialSteel,Tempered Glass,Plastic
Compatibility
Supported motherboard sizesMicro-ATX
Mini-ITX

Questions about this item

Does the ASUS A21 need a Micro-ATX or Mini-ITX motherboard to fit?

The case accepts Micro-ATX and Mini-ITX boards and also supports rear-mounted MATX and YTX layouts.

Will a 360 mm radiator in the front panel leave room for my existing 380 mm graphics card?

Maximum GPU length is 380 mm and the front supports a 360 mm radiator, so both can fit together.

How can I confirm the front USB ports are running at 5 Gbps after assembly?

Plug a USB 3.0 device into either front port and check that the OS reports a 5 Gbps connection speed.

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