- Stock: 3
- Brand: ASUS
- Model: B450M-A II
ASUS Prime B450M-A II AMD B450 AM4 Micro-ATX Motherboard
Build a versatile, high-performance, and future-proof desktop system with the ASUS Prime B450M-A II micro-ATX motherboard. Expertly engineered to support AMD Ryzen 5000, 4000, 3000, and 2000 Series desktop processors, this heavy-duty motherboard offers a rock-solid foundation for mainstream gaming rigs and high-productivity workstations. Featuring an optimized power solution and comprehensive cooling features, it ensures your system remains perfectly stable and cool under heavy gaming or multitasking sessions.
The standout feature of the ASUS Prime B450M-A II is its exceptional modern feature set, highlighted by a dedicated onboard BIOS FlashBack button, allowing you to update your firmware quickly and easily even without a CPU or memory installed. It comes packed with a high-speed PCIe 3.0 M.2 slot for ultra-fast NVMe SSD performance, four DDR4 DIMM slots for memory expansion, and blazing-fast USB 3.2 Gen 2 Type-A ports for rapid external data transfer. Enhanced with Fan Xpert 2+ software, ASUS Aura Sync RGB headers, and durable 5X Protection III hardware safeguards, this motherboard delivers premium reliability and flexibility for tech enthusiasts and casual builders alike.
ASUS Prime B450M-A II Motherboard
ASUS Prime B450M-A II — Full Specifications
Platform
| Spec | Detail |
|---|---|
| Form Factor | Micro-ATX (mATX) |
| Socket | AMD AM4 |
| Chipset | AMD B450 |
| CPU Support | AMD Ryzen 5000 / 3rd / 2nd / 1st Gen Ryzen, Athlon |
| BIOS | 256MB AMI UEFI BIOS |
| BIOS Features | BIOS FlashBack™ |
| VRM Phases | 5 phases, 50A |
| VRM Heatsink | ✅ Yes |
| PCH Heatsink | ✅ Yes |
Memory
| Spec | Detail |
|---|---|
| Type | DDR4 |
| Slots | 4× DIMM slots |
| Max Capacity | 128 GB |
| Channels | Dual-Channel |
| Native Speeds | 2133 / 2400 / 2666 MHz |
| OC Speeds | 2800 / 3000 / 3200 / 3333 / 3400 / 3466 / 3600 / 3733 / 3866 / 4000 / 4400 MHz (O.C.) |
| ECC Support | Non-ECC & Non-Registered ECC |
Expansion Slots
| Slot | Detail |
|---|---|
| PCIe x16 | 1× PCIe 3.0 x16 (SafeSlot Core) |
| PCIe x1 | 2× PCIe 2.0 x1 |
???? Storage
| Spec | Detail |
|---|---|
| M.2 Slots | 1× M.2 slot |
| SATA | 6× SATA III (6 Gb/s) |
| RAID | RAID 0, 1, 10 |
Display Output (Rear)
| Port | Detail |
|---|---|
| HDMI | ✅ HDMI 2.0b |
| DVI-D | ✅ Yes |
| D-Sub (VGA) | ✅ Yes |
USB — Rear Panel
| Port | Detail |
|---|---|
| USB 3.2 Gen 2 (10Gbps) | ✅ Type-A |
| USB 3.2 Gen 1 (5Gbps) | ✅ Yes |
| USB 2.0 | ✅ Yes |
| PS/2 | ✅ 1× combo port (keyboard/mouse) |
Internal Headers
| Header | Detail |
|---|---|
| USB 3.2 Gen 1 | 2× (front panel) |
| USB 2.0 | 4× (front panel) |
| RGB (Aura Sync) | ✅ RGB header |
| ARGB | ✅ Addressable RGB header |
| Fan Headers | 2× system fan + 1× CPU fan |
| S/PDIF | ✅ Yes |
| TPM | ✅ Yes |
| Clear CMOS | ✅ Yes |
Networking
| Spec | Detail |
|---|---|
| LAN | Gigabit Ethernet (1 GbE) — Realtek |
| Wi-Fi | ❌ Not included |
| Bluetooth | ❌ Not included |
Audio
| Spec | Detail |
|---|---|
| Codec | Realtek High Definition Audio |
| Channels | 7.1 Surround Sound |
| Bit Depth | 24-bit |
| Rear Audio Jacks | 3× 3.5mm jacks |
Physical
| Spec | Detail |
|---|---|
| Dimensions | 244 × 244 mm (Micro-ATX standard) |
| PCB Color | Black |
Key Features
| Feature | Detail |
|---|---|
| SafeSlot Core | 1.6× stronger retention and 1.3× greater shearing resistance than standard PCIe slots |
| BIOS FlashBack | ✅ Update BIOS without CPU or RAM installed |
| Aura Sync RGB | ✅ Sync RGB with other Aura-compatible devices |
| Software | ASUS AI Suite 3, Fan Xpert |
