MSI PRO B840M-B AMD AM5 Micro ATX Motherboard

The MSI PRO B840M-B delivers professional-grade performance for AMD Ryzen 9000, 8000, and 7000 series processors. Built on the AMD B840 chipset, this Micro ATX motherboard combines essential features with MSI's exclusive technologies for reliable computing and productivity.

DDR5 Memory Performance

Equipped with dual-channel DDR5 memory support reaching speeds up to 8000+ MT/s (OC), this motherboard handles demanding applications with ease. Two DIMM slots accommodate up to 128GB of DDR5 memory, supporting Non-ECC, Un-buffered modules with AMD EXPO and CUDIMM compatibility. Memory Boost technology ensures pure data signals for optimal stability and performance.

Power Delivery and Cooling

The direct 7+2+1 power system features P-PAK components and an 8-pin CPU power connector, supported by a 6-layer PCB with 2oz thickened copper. Core Boost technology provides premium layout and fully digital power design for multi-core processors. Frozr AI Cooling automatically detects CPU and GPU temperatures, adjusting fan duty cycles to maintain optimal thermal performance.

Storage and Expansion

Two M.2 slots with PCIe 4.0 x4 support deliver Lightning Gen4 speeds up to 64GB/s bandwidth. The primary M.2_1 slot supports 2280/2260 drives via PCIe 4.0 x4, while M.2_2 offers PCIe 4.0 x4/x2 flexibility. Four SATA III ports provide additional storage options with RAID 0, 1, and 10 support. Expansion capabilities include one PCIe 4.0 x16 slot and one PCIe 3.0 x1 slot.

Connectivity Features

The 2.5G LAN port delivers secure, stable networking for professional and multimedia applications. Integrated graphics support includes VGA and HDMI outputs for flexible display configurations. USB connectivity includes front Type-C at 5Gbps, multiple USB 5Gbps Type-A ports, and USB 2.0 options. Realtek ALC897 Audio Boost provides 7.1-channel high definition audio with studio-grade sound quality.

User-Friendly Design

EZ PCIe Clip II enables single-finger graphics card removal, even in compact cases. EZ M.2 Clip II simplifies M.2 drive installation without screws. EZ Debug LED provides straightforward troubleshooting for CPU, memory, graphics, and boot issues. The motherboard includes three addressable V2 RGB LED headers and one standard RGB LED header for customization.

AI-Enhanced Features

MSI's AI Engine optimizes application performance automatically, while AI LAN Manager minimizes latency for seamless online experiences. AI Boost overclocks the NPU for enhanced AI workload performance, making this motherboard ready for AI PC applications.

Package Contents

Includes two EZ M.2 Clip II fasteners, EZ M.2 Clip II remover tool, and standard mounting hardware. Backed by a 3-year warranty for reliable long-term operation.