Motherboard MSI B840M B Pro

MSI PRO B840M-B

The MSI PRO B840M-B is a compact Micro ATX motherboard designed for modern AMD systems using the AM5 socket and AMD B840 chipset. Its compact form factor makes it suitable for space-conscious gaming PCs, home desktops and performance-focused builds while retaining a strong selection of modern connectivity features. The motherboard provides two DDR5 DIMM slots supporting up to 128GB of memory, with supported speeds reaching up to DDR5-8200+ (OC) for compatible memory configurations. Expansion includes a PCIe 4.0 x16 slot and PCIe 3.0 x1 slot, while two M.2 PCIe 4.0 x4 slots provide high-speed NVMe storage connectivity. Integrated 2.5GbE LAN, Wi-Fi 6E and Bluetooth 5.3 provide flexible networking options, while Realtek 7.1-channel HD Audio completes the core platform.

DDR5 Memory Support

The motherboard features two DDR5 DIMM slots with support for up to 128GB of system memory, providing a practical memory configuration for compact AMD-based systems. Supported memory speeds reach up to DDR5-8200+ (OC), allowing compatible high-speed DDR5 modules to operate at elevated frequencies when configured accordingly. The two-slot design keeps the Micro ATX platform straightforward while still allowing a substantial memory capacity for gaming, multitasking and everyday desktop workloads. Users can install a suitable pair of DDR5 modules to take advantage of the available memory configuration and performance potential. Built around the AM5 socket and AMD B840 chipset, the MSI PRO B840M-B provides a modern foundation for compatible AMD processors and high-speed DDR5 memory. Its compact design is particularly suitable for systems where efficient motherboard layout and a smaller overall PC footprint are important considerations.

PCIe 4.0 and NVMe Storage

For graphics and expansion, the MSI PRO B840M-B includes one PCIe 4.0 x16 slot, providing a high-bandwidth interface for a compatible graphics card or other supported PCIe hardware. An additional PCIe 3.0 x1 slot provides further expansion capability for compatible devices. Storage connectivity is provided through two M.2 PCIe 4.0 x4 slots, allowing users to install modern NVMe SSDs directly onto the motherboard. These M.2 interfaces provide a fast and compact storage solution while helping keep the internal build organised. The motherboard also includes four SATA 6Gb/s ports, providing additional connectivity for compatible SATA storage devices. This combination gives users flexibility when configuring storage, allowing multiple NVMe drives to be combined with SATA-based storage where additional capacity is required. For gaming PCs and general desktop systems, the available interfaces provide a practical balance of high-speed storage and expansion options within the Micro ATX form factor.

2.5GbE LAN, Wi-Fi 6E and Bluetooth 5.3

Networking is integrated directly into the motherboard, providing a choice of wired and wireless connectivity for modern desktop systems. The 2.5GbE LAN interface provides a high-speed wired network connection for compatible networking equipment and supported high-speed local connections. For wireless networking, integrated Wi-Fi 6E provides a modern wireless solution without requiring a separate Wi-Fi expansion card. The motherboard also includes Bluetooth 5.3, allowing compatible wireless peripherals and accessories to connect directly to the system. This combination makes the board flexible for different desktop environments, whether the PC is connected through Ethernet or used wirelessly. For gaming systems, integrated networking can also help simplify the overall build by reducing the need for additional networking hardware. With 2.5GbE LAN, Wi-Fi 6E and Bluetooth 5.3 built into the platform, the MSI PRO B840M-B provides a versatile connectivity foundation for compact AMD-based PCs.

Compact Micro ATX Platform

The Micro ATX form factor makes the MSI PRO B840M-B a practical choice for users who want to build a smaller AMD desktop without moving to a more restricted compact platform. Despite its compact format, the motherboard provides two DDR5 DIMM slots, one PCIe 4.0 x16 slot, one PCIe 3.0 x1 slot, two M.2 PCIe 4.0 x4 slots and four SATA 6Gb/s connections. This gives the system a balanced selection of memory, expansion and storage interfaces for gaming and everyday desktop use. The two M.2 slots allow modern NVMe storage to be installed directly on the motherboard, while the SATA ports provide additional storage flexibility. Integrated networking also reduces the need for separate expansion cards. As an AM5 motherboard based on the AMD B840 chipset, the MSI PRO B840M-B offers a straightforward platform for building modern AMD systems where compact dimensions, high-speed storage and flexible networking are important requirements.

7.1-Channel HD Audio

Audio connectivity is provided through Realtek 7.1-channel HD Audio, giving the MSI PRO B840M-B integrated multi-channel audio capability for gaming, entertainment and everyday desktop use. The 7.1-channel configuration provides support for compatible multi-channel audio equipment while also serving conventional headphone and speaker setups. Having integrated audio keeps the system straightforward and avoids the need for a separate sound card for typical desktop configurations. Alongside its audio features, the motherboard combines the AM5 socket, AMD B840 chipset, DDR5 support up to 128GB, PCIe 4.0 x16 expansion, two M.2 PCIe 4.0 x4 slots, four SATA ports, 2.5GbE LAN, Wi-Fi 6E and Bluetooth 5.3. The result is a compact Micro ATX platform that brings together modern memory, storage, networking and audio connectivity in one motherboard. It is well suited to AMD-based gaming and desktop systems where a compact layout and comprehensive core features are required.