ASUS Prime B850M-A WIFI AM5 DDR5 Micro-ATX Motherboard
The ASUS Prime B850M-A WIFI delivers next-generation connectivity and reliable performance in a compact Micro-ATX form factor. Featuring AMD B850 chipset, DDR5 support, and integrated WiFi 6, this motherboard offers exceptional value for AM5 builds without compromising on essential features.
Compact Performance
Connectivity Features
- WiFi 6 (802.11ax) + Bluetooth 5.2
- 2.5Gb Ethernet with ASUS LANGuard
- PCIe 4.0 x16 slot
- Dual M.2 slots (PCIe 4.0)
Power Design
- 8+2+1 power stages
- 8-pin CPU power connector
- ProCool power connectors
- VRM heatsink for thermal management
Technical Specifications
| Specification | Detail |
|---|---|
| Model | 90MB1LN0-M0EAY0 (199291051126) |
| Socket | AM5 (LGA 1718) |
| Chipset | AMD B850 |
| Memory | 4x DDR5, 6400MHz+ (OC) |
| Expansion Slots | 1x PCIe 4.0 x16, 1x PCIe 3.0 x16 (x4 mode), 2x PCIe 3.0 x1 |
| Storage | 2x M.2 (PCIe 4.0), 4x SATA 6Gb/s |
| Wireless | WiFi 6 + Bluetooth 5.2 |
| LAN | Realtek 2.5Gb Ethernet |
| USB Ports | 1x USB 3.2 Gen2, 2x USB 3.2 Gen1, 4x USB 2.0 |
| Form Factor | Micro-ATX (24.4cm x 24.4cm) |
Prime Features
- ASUS OptiMem II for memory stability
- Fan Xpert 2+ for smart cooling
- Pre-mounted I/O shield
- BIOS FlashBack button
- Q-LED for troubleshooting
- AI Noise Cancellation
- ASUS Armoury Crate support
- 5X Protection III with safe slots
💡 Pro Tip:
Ideal for compact builds and budget-conscious gamers. Pair with DDR5-6000 memory for optimal Ryzen 7000 performance. The Micro-ATX form factor fits perfectly in smaller cases while maintaining full functionality.


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