ASUS PRIME B850M-A WIFI – AI-Ready Power in a Compact Form Factor
The ASUS PRIME B850M-A WIFI is designed to unleash the full potential of AMD Ryzen™ 9000, 8000, and 7000 Series processors. Built on the AMD B850 chipset, it supports dual-channel DDR5 memory up to 256GB, PCIe® 5.0 x16 graphics, and triple M.2 slots (PCIe 5.0 and 4.0), delivering blazing-fast connectivity for gaming, AI, and content workflows.
Equipped with an 8+2+1 phase digital power design, six-layer PCB, Digi+ VRM control, and ASUS 5X Protection III, this board ensures stability and durability for long-term use. Cooling is enhanced with enlarged VRM heatsinks, M.2 heatsinks, and ASUS Fan Xpert 2+ software for smart fan control.
AI-focused innovations like AI Cache Boost (up to 29% faster local LLM performance) and AI Advisor make this board future-ready for demanding AI workloads. Connectivity includes WiFi 6E with ASUS Q-Antenna, Realtek 2.5Gb Ethernet, rear USB 10Gbps, and front USB Type-C® 5Gbps.
For personalization, the PRIME B850M-A WIFI features Armoury Crate, Aura Sync RGB with addressable Gen 2 headers, and GlideX for cross-device integration. DIY-friendly features like Pre-mounted I/O Shield, Q-Antenna, BIOS FlashBack™, SafeSlot, and Q-LED simplify building and upgrading.
Features
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Supports AMD Ryzen™ 9000 / 8000 / 7000 Series processors (AM5 socket)
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8+2+1 phase digital power design with Digi+ VRM and six-layer PCB
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Dual-channel DDR5 support up to 256GB, AMD EXPO™, and AEMP profiles
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PCIe® 5.0 x16 SafeSlot for GPUs and 3× M.2 slots (PCIe 5.0 / 4.0)
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AI Cache Boost for faster LLM workflows and AI Advisor for easy tuning
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WiFi 6E with ASUS Q-Antenna and Realtek 2.5Gb Ethernet with LANGuard
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USB 10Gbps (rear), USB 5Gbps Type-C® (front) for rapid connectivity
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ASUS Fan Xpert 2+ with Auto-Tuning and Extreme Quiet modes
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Armoury Crate, Aura Sync RGB, Gen 2 ARGB headers for personalization
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DIY-friendly design: Q-Antenna, Pre-mounted I/O Shield, BIOS FlashBack™, SafeSlot
Specifications
| Categories | Details |
|---|---|
| Model | ASUS PRIME B850M-A WIFI |
| CPU Support | AMD Socket AM5 – Ryzen™ 9000, 8000, 7000 Series |
| Chipset | AMD B850 |
| Memory | 4× DDR5 DIMM, up to 256GB, 8000+ MT/s (OC), ECC/Non-ECC, Dual Channel, AMD EXPO™, AEMP |
| Graphics Outputs | 2× DisplayPort 1.4 (8K@30Hz), 1× HDMI 2.1 (4K@60Hz) |
| Expansion Slots | 1× PCIe 5.0 x16 SafeSlot (Ryzen 9000/7000), 1× PCIe 4.0 x16 (x1 mode) |
| Storage | 3× M.2 (1× PCIe 5.0, 2× PCIe 4.0), 4× SATA 6Gb/s |
| RAID Support | RAID 0/1/5/10 (Ryzen 9000), RAID 0/1 (Ryzen 8000), RAID 0/1/10 (Ryzen 7000) |
| Networking | Realtek 2.5Gb Ethernet with ASUS LANGuard |
| Wireless | WiFi 6E (2×2, 2.4/5/6GHz), Bluetooth® 5.3, ASUS Q-Antenna |
| USB (Rear I/O) | 2× USB 10Gbps (Type-A), 2× USB 5Gbps (Type-A), 4× USB 2.0 (Type-A) |
| USB (Front I/O) | 1× USB Type-C® 5Gbps, 1× USB 5Gbps header (2 ports), 2× USB 2.0 headers (4 ports) |
| Audio | Realtek 7.1 Surround Sound CODEC, 24-bit/192kHz, premium capacitors, shielding |
| Back Panel I/O | 2× DisplayPort, 1× HDMI, 2× USB 10Gbps, 2× USB 5Gbps, 4× USB 2.0, WiFi, 2.5GbE, 3× audio jacks, BIOS FlashBack™ button |
| Internal Headers | 1× CPU Fan, 1× CPU OPT, 1× AIO Pump, 3× Chassis Fan, 3× ARGB Gen 2, TPM, Clear CMOS, COM, Front Panel, S/PDIF, Audio |
| Power Connectors | 24-pin ATX, 8-pin CPU, 4-pin CPU |
| Form Factor | micro-ATX (24.4 × 24.4 cm) |
| Operating System | Windows® 11, Windows® 10 64-bit |
| Accessories | 2× SATA cables, WiFi Q-Antenna, M.2 rubber + screws, Quick Start Guide |
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