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Gigabyte B860M H specifications and in-depth review

Gigabyte B860M H

Manufacturer: Gigabyte

The Gigabyte B860M H is a Micro-ATX motherboard designed around Intel's LGA 1851 socket and B860 chipset, offering a compact form factor measuring 244 mm by 215 mm. It ships with a three-year warranty and includes dual BIOS support, which allows the system to recover from a failed firmware update without manual intervention.

Memory support runs on DDR5 across two slots with a dual-channel configuration, accommodating up to 128 GB at standard speeds reaching 6400 MHz and overclocked profiles up to 8800 MHz. Connectivity on the rear panel includes four USB 3.2 Gen 1 Type-A ports, two USB 2.0 ports, a single RJ45 port, and an HDMI 2.1 output. Internally, the board provides four SATA 3 connectors, two M.2 sockets, and a PCIe 5.0 x16 slot for the primary graphics card, alongside full support for RAID 0, 1, 5, and 10 configurations across its storage interfaces.

Pros
  • Dual BIOS provides a built-in recovery path if a firmware update fails
  • PCIe 5.0 x16 slot supports current-generation add-in cards at full bandwidth
  • DDR5 memory with overclocked support up to 8800 MHz allows for flexible memory tuning
  • Full RAID 0, 1, 5, and 10 support gives meaningful flexibility for multi-drive storage configurations
  • Three-year warranty offers solid long-term coverage
  • 7.1-channel audio support accommodates multi-speaker setups without an add-in sound card
Cons
  • Only two memory slots limit future upgrade options without replacing existing modules
  • No USB Type-C ports on the rear panel restricts connectivity for modern peripherals
  • Wi-Fi and Bluetooth are absent, requiring additional hardware for wireless connectivity
  • No S/PDIF Out port limits digital audio output options
  • Only three fan headers may be insufficient for builds with more extensive cooling setups
  • No CMOS reset button makes BIOS recovery less straightforward
Who is this for?

This board is a practical fit for users building a compact desktop system around Intel's LGA 1851 platform who want capable storage and expansion options in a smaller footprint. The PCIe 5.0 x16 slot makes it well-suited for pairing with a current-generation discrete GPU, while support for RAID 0, 1, 5, and 10 across four SATA 3 connectors and two M.2 sockets appeals to users who need structured multi-drive storage. The dual BIOS and DDR5 memory support with overclocking up to 8800 MHz also make it a reasonable choice for enthusiasts who want some tuning headroom without stepping up to a full ATX platform.

Who is this NOT for?

This board is not a good match for users who rely on wireless connectivity, as neither Wi-Fi nor Bluetooth is included, meaning a wired network setup or additional hardware is required. Those who need a rich selection of high-speed rear USB ports — particularly USB Type-C, USB 3.2 Gen 2, or Thunderbolt — will find the rear I/O limiting for modern peripheral use. Additionally, builders planning memory-heavy configurations may find the two-slot DDR5 layout restrictive over time, since there is no room to expand by adding modules — only replacing them.

General info:

CPU socket LGA 1851
chipset B860
form factor Micro-ATX
supports Wi-Fi ✕
Has Bluetooth ✕
HDMI version HDMI 2.1
Easy to overclock ✓
has RGB lighting ✕
Easy to reset BIOS ✕
Has dual BIOS ✓
CPU sockets 1
Has integrated graphics ✕
warranty period 3 years
height 215 mm
width 244 mm
Has integrated CPU ✕

The Gigabyte B860M H is built around the LGA 1851 socket and B860 chipset, housed in a Micro-ATX form factor with dimensions of 244 mm by 215 mm. It supports a single CPU and does not include an integrated CPU or integrated graphics. The board features dual BIOS for firmware recovery, supports easy overclocking, but does not offer a one-step CMOS reset. Video output is handled through an HDMI 2.1 port, while Wi-Fi and Bluetooth are not present. There is no RGB lighting on the board, and it carries a three-year warranty.

Memory:

maximum memory amount 128GB
RAM speed (max) 6400 MHz
overclocked RAM speed 8800 MHz
memory slots 2
DDR memory version 5
memory channels 2
Supports ECC memory ✕

The board uses DDR5 memory across two slots in a dual-channel configuration, with a maximum supported capacity of 128 GB. Standard RAM speeds reach up to 6400 MHz, while overclocked profiles can push that figure to 8800 MHz. ECC memory is not supported.

Ports:

USB 3.2 Gen 2 ports (USB-A) 0
USB 3.2 Gen 1 ports (USB-A) 4
USB 3.2 Gen 2 ports (USB-C) 0
USB 3.2 Gen 1 ports (USB-C) 0
USB 2.0 ports 2
USB 3.2 Gen 2x2 ports 0
USB 4 40Gbps ports 0
USB 4 20Gbps ports 0
Thunderbolt 4 ports 0
Thunderbolt 3 ports 0
has an HDMI output ✓
DisplayPort outputs 0
RJ45 ports 1
Has USB Type-C ✕
eSATA ports 0
DVI outputs 0
has a VGA connector ✕
PS/2 ports 1

The rear I/O panel provides four USB 3.2 Gen 1 Type-A ports and two USB 2.0 ports for peripheral connectivity, while USB Type-C, USB 3.2 Gen 2, USB 4, Thunderbolt 3, and Thunderbolt 4 are all absent. Display output is limited to a single HDMI port, with no DisplayPort, DVI, or VGA connectors available. Networking is handled by one RJ45 port, and a single PS/2 port is present for legacy input devices. eSATA is not included.

Connectors:

USB 3.2 Gen 1 ports (through expansion) 2
USB 2.0 ports (through expansion) 4
SATA 3 connectors 4
fan headers 3
USB 3.0 ports (through expansion) 2
M.2 sockets 2
Has TPM connector ✓
U.2 sockets 0
Has mSATA connector ✕
SATA 2 connectors 0

For storage, the board includes four SATA 3 connectors and two M.2 sockets, while SATA 2, mSATA, and U.2 are not available. Internal expansion headers cover two USB 3.2 Gen 1 ports, two USB 3.0 ports, and four USB 2.0 ports for adding front-panel connectivity. Cooling is managed through three fan headers, and a TPM connector is present for hardware-based security functionality.

Expansion slots:

PCIe 4.0 x16 slots 0
PCIe 5.0 x16 slots 1
PCIe 3.0 x16 slots 0
PCIe x1 slots 1
PCI slots 0
PCIe 2.0 x16 slots 0
PCIe x4 slots 0
PCIe x8 slots 0

The board offers one PCIe 5.0 x16 slot as the primary expansion slot, suitable for a dedicated graphics card or other high-bandwidth add-in cards. A single PCIe x1 slot is also present for smaller expansion cards. No PCIe 4.0, 3.0, or 2.0 x16 slots are included, and there are no PCIe x4, x8, or legacy PCI slots on this board.

Audio:

audio channels 7.1
Has S/PDIF Out port ✕
audio connectors 3

The board supports 7.1-channel audio output through three analog audio connectors on the rear panel. A S/PDIF Out port is not included.

Storage:

Supports RAID 1 ✓
Supports RAID 10 (1+0) ✓
Supports RAID 5 ✓
Supports RAID 0 ✓
Supports RAID 0+1 ✕

The board supports RAID 0, 1, 5, and 10 configurations for flexible storage array setups, whether the priority is performance, redundancy, or a combination of both. RAID 0+1 is not supported.

Final Verdict

The Gigabyte B860M H is a focused Micro-ATX motherboard that delivers a capable foundation for Intel LGA 1851 builds without unnecessary extras. Its PCIe 5.0 x16 slot combined with DDR5 support and overclocking headroom up to 8800 MHz gives it a clear advantage for users who want a compact platform that can still handle current-generation hardware. The dual BIOS adds a layer of reliability that is genuinely useful, and the RAID support across multiple storage interfaces adds practical value for data-conscious users. That said, the absence of wireless connectivity, limited rear USB options, and a two-slot memory layout mean it suits a specific type of build rather than a broadly flexible one. For users whose priorities align with its strengths — a small footprint, storage versatility, and modern expansion capability — it represents a solid and well-defined option within its category.

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