ASUS A21 Plus ARGB White Micro-ATX Case - 360mm Rad
ASUS
ASUS A21 Plus ARGB White Micro-ATX Case - 360mm Rad
The ASUS A21 Plus ARGB White Micro-ATX Case is built for minimalist mainstream DIY builders who want tidy wiring and strong thermal headroom in a compact footprint. It ships with four pre-installed ARGB fans and accepts up to 360 mm radiators and 380 mm graphics cards, so builders are not forced to compromise on cooling or GPU choice. The white internal I/O cables and hidden-connector motherboard support make it a natural fit for clean, minimal builds.
Why this product
360 mm radiator support front and top
Despite its Micro-ATX footprint, it accommodates 360 mm radiators at both the front and top, giving AIO cooler options normally associated with larger mid-tower cases.
Four ARGB fans included at purchase
Three 120 mm ARGB fans are pre-installed at the front and one 120 mm ARGB fan at the rear, providing immediate airflow without additional fan purchases.
Hidden-connector motherboard support
It is compatible with BTF hidden-connector motherboards, keeping power and data cables routed behind the board for a clutter-free interior.
380 mm GPU clearance
Graphics cards up to 380 mm in length fit without modification, covering the majority of current mid-range and high-end discrete GPUs.
40% porous front mesh
The front panel is 40% open to balance intake airflow, dust filtering and RGB light visibility through a single panel design.
33 mm cable management compartment
A dedicated 33 mm wide channel behind the motherboard tray keeps all wiring out of the main chamber without forcing tight bends.
- Form FactorMicro-ATX
- Motherboard SupportMini-ITX, Micro-ATX, BTF compatible
- Pre-installed Fans4 x ARGB 120 mm
- Max Radiator Support360 mm (front and top)
- Max GPU Length380 mm
- Max CPU Cooler Height165 mm
- Dimensions220 x 430 x 465 mm
- Weight8.1 kg
- SKUASU-2531
- EAN4711387406281
- Supports Mini-ITX and Micro-ATX motherboards, including BTF hidden-connector boards.
- Accommodates CPU air coolers up to 165 mm tall.
- Accepts graphics cards up to 380 mm in length across 5 expansion slots.
- Fits power supply units up to 210 mm in length.
- Rear radiator support is limited to a single 120 mm slot; larger rear radiators are not supported.
- ATX and E-ATX motherboards are not supported.
Best for
- Compact builds with full-size cooling: builders who want 360 mm AIO support in a Micro-ATX chassis rather than stepping up to a mid-tower.
- Cable-conscious builders: those using BTF hidden-connector motherboards who want colour-matched white internal cables and a 33 mm management compartment.
- Immediate out-of-box cooling: builders who prefer not to purchase fans separately, as four ARGB 120 mm fans are already installed.
- Long GPU installations: users fitting cards up to 380 mm who need that clearance in a smaller case footprint.
Trade-offs
- ATX or larger motherboard builds: the case physically supports only Mini-ITX and Micro-ATX form factors.
- Builders needing extensive drive storage: only two combo 2.5"/3.5" bays and one dedicated 2.5" bay are available.
- Large PSU configurations: power supply units longer than 210 mm will not fit.
- Very tall CPU tower coolers: air coolers above 165 mm in height exceed the maximum clearance.
The ASUS A21 PLUS is a PC case crafted for minimalist mainstream DIY PC builders, with support for a variety of AIO coolers and graphics cards, and the four pre-installed ARGB fans provide plenty of airflow potential to keep things running smoothly.
Despite being a micro-ATX case, the A21 PLUS 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.
The front-panel mesh of the A21 PLUS is 40% porous to maximize the balance of airflow and RGB visibility. Within, four pre-installed ARGB fans ensure ample cooling.
The A21 PLUS provides a compartment behind the motherboard that is 33 mm wide to help you keep your wiring tucked away and tidy.
Both variants of the A21 PLUS come with color-coordinated black or white internal I/O cables to compliment your build theme.
General
| Brand | ASUS |
|---|---|
| Model | A21 Plus ARGB |
| Colour | White |
| Form Factor | Micro-ATX |
| Dimensions (W x H x D) | 220 x 430 x 465 mm |
| Weight | 8.1 kg |
Motherboard & Expansion
| Supported Form Factors | Mini-ITX, Micro-ATX |
|---|---|
| BTF Motherboard Compatible | Yes |
| Expansion Slots | 5 |
Cooling & Radiator Support
| Pre-installed Fans (Front) | 3 x 120 mm ARGB |
|---|---|
| Pre-installed Fans (Rear) | 1 x 120 mm ARGB |
| Front Fan Support | 3 x 120 mm or 2 x 140 mm |
| Top Fan Support | 3 x 120 mm or 2 x 140 mm |
| Rear Fan Support | 1 x 120 mm |
| Front Radiator Support | 120 mm, 140 mm, 240 mm, 280 mm, 360 mm |
| Top Radiator Support | 120 mm, 140 mm, 240 mm, 280 mm, 360 mm |
| Rear Radiator Support | 120 mm |
| Max CPU Cooler Height | 165 mm |
| Front Panel Mesh Porosity | 40% |
Storage, I/O & Clearances
| Drive Bays | 2 x 2.5"/3.5" combo, 1 x 2.5" |
|---|---|
| Front I/O | 2 x USB 3.2 Gen 1, 1 x Headphone, 1 x Microphone |
| Max GPU Length | 380 mm |
| Max PSU Length | 210 mm |
| Cable Management Compartment | 33 mm wide behind motherboard tray |
Shipping
All our products are shipped from the United Kingdom within 24 to 48 hours of purchase. See our Shipping and Returns page for full details.
Returns
- Tech Syndicate offers a full money-back guarantee on all purchases made in our store. If you are not satisfied with your purchase, we will provide a full refund, no questions asked.
- Refunds are available within 45 days of delivery.
- After the 45-day period you are no longer eligible for a refund, so we encourage you to try the product within the first few weeks to make sure it fits your needs.