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The MSI PRO B850M-A WIFI is a high-performance Micro-ATX motherboard engineered for AMD Ryzen 9000, 8000, and 7000 Series desktop processors on the Socket AM5 platform. Built on the AMD B850 chipset, it combines business-grade stability with enthusiast-level bandwidth for demanding workstations, content creation rigs, and modern PC builds. Its four DDR5 UDIMM slots support up to 256GB of dual-channel memory, featuring AMD EXPO support and overclocking speeds reaching up to 8200+ MT/s.
Equipped for next-generation expansion and storage, the motherboard provides a primary PCIe 5.0 x16 graphics slot alongside a blazing-fast PCIe 5.0 x4 M.2 slot and a secondary PCIe 4.0 x4 M.2 slot routed directly from the CPU. Networking is powered by an onboard Realtek 5Gbps LAN controller and a pre-installed Wi-Fi 7 module with Bluetooth 5.4, Multi-Link Operation (MLO), and speeds up to 2.9Gbps. Complete with rear and front USB 10Gbps Type-C ports, supplemental 8-pin PCIe board power, Clear CMOS and Flash BIOS buttons, and EZ Debug LEDs, the PRO B850M-A WIFI delivers comprehensive connectivity and effortless system management.
Key Features
| Specification | Details |
| Brand and Model | MSI PRO B850M-A WIFI |
| Chipset | AMD B850 |
| CPU Socket & Support | Socket AM5 | Supports AMD Ryzen 9000 / 8000 / 7000 Series Desktop Processors |
| Memory Slots & Capacity | 4 x DDR5 UDIMM Slots (Single-Sided Latches) | Maximum Memory Capacity: 256GB |
| Supported Memory Speeds | DDR5 8200 - 5600 (OC) MT/s | 5600 - 4800 (JEDEC) MT/s | Ryzen 9000 Max OC: 1DPC 1R up to 8200+ MT/s, 1DPC 2R up to 6400+ MT/s, 2DPC 1R up to 6400+ MT/s, 2DPC 2R up to 6000+ MT/s |
| Memory Architecture | Dual-Channel Mode | Non-ECC, Un-buffered Memory | Supports AMD EXPO, AMD POR Speed, JEDEC Speed, and CUDIMM (Clock Driver Bypass Mode Only) |
| Onboard Graphics Outputs | 1 x HDMI 2.1 Port (Max Resolution 4K at 60Hz) | 1 x DisplayPort 1.4 Port (Max Resolution 4K at 60Hz) (Available only on processors with integrated graphics) |
| Expansion Slots | 2 x PCI-E x16 Slots & 1 x PCI-E x1 Slot: PCI_E1 Gen PCIe 5.0 up to x16 from CPU (PCIe 5.0 x16 for Ryzen 9000/7000, PCIe 4.0 x8 for Ryzen 8700/8600/8400, PCIe 4.0 x4 for Ryzen 8500/8300) | PCI_E2 Gen PCIe 3.0 up to x1 (From Chipset) | PCI_E3 Gen PCIe 4.0 up to x4 (From Chipset) |
| M.2 Storage Slots | 2 x M.2 Slots (From CPU, fits 2280/2260 devices): M.2_1 supports up to PCIe 5.0 x4 (Ryzen 9000/7000) or PCIe 4.0 x4 (Ryzen 8000) | M.2_2 supports up to PCIe 4.0 x4 (or PCIe 4.0 x2 for Ryzen 8500/8300) |
| SATA & RAID Support | 4 x SATA 6G Ports | Supports RAID 0, RAID 1, and RAID 10 for SATA devices | Supports RAID 0 and RAID 1 for M.2 NVMe devices |
| Ethernet / LAN | Realtek 8126VB 5Gbps LAN Controller |
| Wireless LAN & Bluetooth | Wi-Fi 7 (802.11 a/b/g/n/ac/ax/be, Pre-installed in M.2 Key-E slot) | Supports MU-MIMO TX/RX, 2.4GHz / 5GHz / 6GHz (160MHz) up to 2.9Gbps, MLO, 4KQAM | Bluetooth 5.4 |
| Audio Codec | Realtek ALC897 Codec | 7.1-Channel High Definition Audio |
| Rear Panel USB Ports | 2 x USB 10Gbps Type-C Ports | 3 x USB 10Gbps Type-A Ports | 3 x USB 5Gbps Type-A Ports |
| Front Panel USB (Internal) | 1 x USB 10Gbps Type-C Port | 2 x USB 5Gbps Type-A Ports | 4 x USB 2.0 Ports |
| Back Panel I/O Ports | Clear CMOS Button | Flash BIOS Button | 1 x DisplayPort 1.4 | 1 x HDMI 2.1 | 2 x USB 10Gbps Type-C | 3 x USB 10Gbps Type-A | 3 x USB 5Gbps Type-A | 1 x 5G LAN (RJ45) | Wi-Fi / Bluetooth Antenna Connectors | Audio Connectors |
| Internal Power & Cooling Headers | 1 x ATX Power Connector (ATX_PWR) | 2 x CPU Power Connectors (CPU_PWR) | 1 x PCIe 8-Pin Power Connector (PCIE_PWR) | 1 x CPU Fan | 1 x Combo Fan (Pump_Sys Fan) | 3 x System Fan Headers |
| Internal RGB & System Headers | 3 x Addressable V2 RGB LED (JARGB_V2) | 1 x RGB LED (JRGB) | 2 x Front Panel (JFP) | 1 x Front Audio (JAUD) | 1 x Chassis Intrusion (JCI) | 1 x Com Port (JCOM) | 1 x Tuning Controller (JDASH) | 1 x TPM Pin Header (Supports TPM 2.0) |
| Diagnostic LED Features | 4 x EZ Debug LED | 1 x EZ Memory Detection LED |
| Chipset | B850M |
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