Motherboard B840M-H Gigabyte

GIGABYTE B840M H – Compact AM5 Foundation

The GIGABYTE B840M H is a Micro ATX motherboard designed for compact AMD-based PC builds using the AM5 socket and AMD B840 chipset. Its smaller form factor makes it suitable for systems where efficient use of internal space is important while still providing the essential connectivity required for a modern desktop configuration. The board supports DDR5 memory through two DIMM slots, with a maximum supported capacity of 128GB and memory speeds of up to DDR5-7200 with overclocking. This provides a practical platform for gaming PCs, home systems and general-purpose workstations where a balanced combination of modern memory technology, expansion capability and compact dimensions is required.

DDR5 Memory Support

For system memory, the GIGABYTE B840M H provides 2 × DDR5 DIMM slots supporting a maximum total capacity of 128GB. The motherboard supports memory speeds of up to DDR5-7200 (OC), allowing compatible memory modules to operate at higher frequencies when the appropriate settings are configured. DDR5 provides the foundation for modern AM5 systems, offering the bandwidth required for current processors and demanding applications. With two available DIMM slots, the board is particularly suited to straightforward memory configurations where capacity and speed can be selected according to the needs of the build. This makes the B840M H a practical choice for compact systems that need modern DDR5 support without requiring a larger ATX motherboard.

PCIe Expansion and Storage

The motherboard provides a straightforward expansion layout consisting of 1 × PCIe 4.0 x16 slot and 1 × PCIe 3.0 x1 slot. The main PCIe 4.0 x16 slot provides the primary expansion interface for a compatible graphics card or other supported PCIe device, while the additional PCIe 3.0 x1 slot can be used for smaller expansion hardware. Storage is provided through 1 × M.2 PCIe 4.0 x4 slot, giving the system a high-speed NVMe storage interface for a compatible M.2 drive. In addition, the board includes 4 × SATA 6Gb/s ports, allowing further SATA-based storage devices to be connected. This combination provides flexibility for compact systems requiring both NVMe and SATA storage.

Wired Networking and Connectivity

For network connectivity, the GIGABYTE B840M H features 1GbE LAN, providing a wired Ethernet connection for everyday networking, internet access, file transfers and other network-based applications. The specification does not include integrated wireless networking, and Wi-Fi is not included on the motherboard. Similarly, Bluetooth is not included. This configuration keeps the board focused on essential wired connectivity while allowing the system specification to be built around the networking hardware required for the intended use. For users who primarily connect their desktop through Ethernet, the integrated 1GbE interface provides a direct wired networking option without requiring an additional network adapter.

Display Outputs and Audio

The GIGABYTE B840M H includes integrated display connectivity through 1 × HDMI 2.1 and 1 × DisplayPort 1.4. These outputs provide display connection options for compatible hardware and configurations where video output through the motherboard is supported. For audio, the board uses Realtek High Definition Audio with support for up to 7.1-channel audio. This provides a suitable onboard audio platform for gaming, entertainment, communication and general desktop use. The combination of modern display outputs and multi-channel onboard audio gives the B840M H the connectivity required for a broad range of everyday PC configurations while maintaining the compact Micro ATX form factor.

Compact AMD B840 Platform

With its AM5 socket, AMD B840 chipset, Micro ATX form factor and DDR5 memory support, the GIGABYTE B840M H provides a compact foundation for modern AMD desktop systems. Its specification combines a PCIe 4.0 x16 expansion slot, PCIe 4.0 x4 M.2 storage, four SATA 6Gb/s ports, 1GbE networking and modern HDMI 2.1 and DisplayPort 1.4 outputs. The board also supports up to 128GB of DDR5 memory at speeds of up to DDR5-7200 with overclocking. With integrated wireless and Bluetooth not included, the B840M H is particularly suited to configurations centred around wired connectivity and essential expansion, making it a practical option for compact gaming PCs and general-purpose AM5 builds.