Gigabyte B840M Eagle WiFi6

Name: Gigabyte B840M Eagle WiFi6
Brand: Gigabyte
SKU: 1639

Manufacturer: Gigabyte

The Gigabyte B840M Eagle WiFi 6 is a Micro-ATX motherboard built around the AM5 socket, making it compatible with AMD's current-generation processor lineup. At 244 x 244 mm, it fits standard Micro-ATX cases while offering a respectable feature set for a board of its size. One of its more practical inclusions is dual BIOS, which provides a recovery fallback if a firmware update goes wrong — a useful safeguard for users who plan to keep their system running long-term.

Memory support runs up to 128 GB across two DDR5 slots in dual-channel configuration, with standard speeds reaching 5200 MHz and overclocked profiles going up to 7200 MHz. Storage options include two M.2 sockets, four SATA 3 connectors, and full support for RAID 0, 1, 5, and 10 arrays. On the connectivity side, the board includes Wi-Fi 6 (802.11ax) and Bluetooth 5.3, alongside a rear panel with two USB 3.2 Gen 1 Type-A ports, four USB 2.0 ports, HDMI 2.1, one DisplayPort output, and a single RJ45 ethernet jack. Expansion is handled through one PCIe 4.0 x16 slot and one PCIe x4 slot, and the board carries a 7.1-channel audio solution with three audio connectors. A three-year warranty is included.

Pros

Dual BIOS provides a firmware recovery fallback, reducing the risk of a failed update leaving the board unusable
Wi-Fi 6 (802.11ax) and Bluetooth 5.3 are built in, removing the need for a separate wireless adapter
DDR5 memory support with overclocked speeds up to 7200 MHz offers headroom for enthusiast memory kits
Two M.2 sockets alongside four SATA 3 connectors give a reasonable range of storage options for a Micro-ATX board
RAID 0, 1, 5, and 10 support allows flexible storage array configurations for both performance and redundancy needs
Three-year warranty provides extended coverage for a platform-critical component

Cons

Only two memory slots limit future upgrade flexibility, as there is no room to add modules without replacing existing ones
No USB Type-C ports on the rear panel, which restricts connectivity for modern peripherals and devices
The single PCIe 4.0 x16 slot and one PCIe x4 slot leave little room for multiple expansion cards
No S/PDIF Out port may be a drawback for users who rely on digital audio output to external receivers or DACs
Absence of a clear CMOS button makes BIOS recovery slightly less straightforward in the event of a failed configuration

Who is this for?

This board is well-suited to users building a capable AM5-based desktop system in a compact footprint, where a Micro-ATX layout satisfies space constraints without sacrificing core functionality. The built-in Wi-Fi 6 and Bluetooth 5.3 make it a practical fit for setups where running ethernet cables is inconvenient, and the dual BIOS feature appeals to those who tinker with firmware settings and want a safety net. Users who intend to configure RAID storage arrays — whether for redundancy or performance — will find the support for RAID 0, 1, 5, and 10 useful, and the two M.2 sockets paired with four SATA 3 ports provide enough storage flexibility for most home or small office builds.

Who is this NOT for?

Users who need extensive expansion options will find this board limiting, as the single PCIe 4.0 x16 slot and one PCIe x4 slot leave little room for multi-card configurations such as multiple GPUs or simultaneous high-bandwidth add-in cards. With only two memory slots, it is also a poor fit for those planning incremental RAM upgrades over time, since reaching higher capacities requires replacing existing modules rather than simply adding new ones. Additionally, users who depend on USB Type-C connectivity for modern peripherals, or who require digital audio output via S/PDIF, will find those features absent from the rear I/O panel.

General info:

CPU socket	AM5
form factor	Micro-ATX
supports Wi-Fi	✓
Wi-Fi version	Wi-Fi 4 (802.11n), Wi-Fi 5 (802.11ac), Wi-Fi 6 (802.11ax)
Has Bluetooth	✓
Bluetooth version	5.3
HDMI version	HDMI 2.1
Easy to overclock	✓
has RGB lighting	✕
Easy to reset BIOS	✕
Has dual BIOS	✓
has aptX	✕
CPU sockets	1
Has integrated graphics	✕
warranty period	3 years
height	244 mm
width	244 mm
Has integrated CPU	✕

The Gigabyte B840M Eagle WiFi 6 uses the AM5 socket and comes in a Micro-ATX form factor measuring 244 x 244 mm, fitting comfortably in standard mid-tower and compact cases. It supports a single CPU and has no integrated processor or integrated graphics. Wireless connectivity covers Wi-Fi 4, 5, and 6 (802.11ax) alongside Bluetooth 5.3, though aptX audio codec support is not included. The board outputs video via HDMI 2.1 and supports overclocking, while dual BIOS provides a firmware recovery option if needed — though a dedicated clear CMOS button is not present. RGB lighting is absent, and the board carries a three-year warranty.

Memory:

maximum memory amount	128GB
RAM speed (max)	5200 MHz
overclocked RAM speed	7200 MHz
memory slots	2
DDR memory version	5
memory channels	2
Supports ECC memory	✕

The board accommodates DDR5 memory across two slots in a dual-channel configuration, supporting a maximum capacity of 128 GB. Standard RAM speeds top out at 5200 MHz, while overclocking profiles can push that figure up to 7200 MHz. ECC memory is not supported.

Ports:

USB 3.2 Gen 2 ports (USB-A)	0
USB 3.2 Gen 1 ports (USB-A)	2
USB 3.2 Gen 2 ports (USB-C)	0
USB 3.2 Gen 1 ports (USB-C)	0
USB 2.0 ports	4
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	1
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 two USB 3.2 Gen 1 Type-A ports and four 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. Video output is handled through an HDMI port and one DisplayPort output, with no DVI or VGA options present. Networking is covered by a single RJ45 port, and a PS/2 port is included for legacy input devices. There are no eSATA ports on this board.

Connectors:

USB 3.2 Gen 1 ports (through expansion)	2
USB 2.0 ports (through expansion)	4
SATA 3 connectors	4
fan headers	4
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

Internal connectivity includes two M.2 sockets and four SATA 3 connectors for storage, with no SATA 2, mSATA, or U.2 sockets present. USB expansion headers support two USB 3.2 Gen 1 ports and four USB 2.0 ports, allowing additional front-panel or bracket connections. The board also features four fan headers for cooling management and includes a TPM connector for hardware-based security module support.

Expansion slots:

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

Expansion is limited but focused, with one PCIe 4.0 x16 slot serving as the primary slot for a dedicated graphics card or similar full-length add-in card, alongside one PCIe x4 slot for additional expansion. There are no PCIe 5.0, PCIe 3.0, PCIe 2.0, PCIe x1, PCIe x8, or legacy PCI slots on this board.

Audio:

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

The board's audio solution supports 7.1-channel output and provides three analog audio connectors on the rear panel. An 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, covering a range of use cases from performance striping to redundancy and combined setups. RAID 0+1 is not supported.

Final Verdict

The Gigabyte B840M Eagle WiFi 6 is a compact, focused AM5 motherboard that delivers a solid foundation for a modern desktop build without overreaching its Micro-ATX boundaries. Its built-in Wi-Fi 6, Bluetooth 5.3, and dual BIOS stand out as genuinely practical inclusions that add day-to-day reliability and convenience, while DDR5 support with overclocking headroom and broad RAID compatibility give it enough depth for users who want more than a bare-bones setup. The trade-offs — limited expansion slots, only two memory slots, and a rear I/O that lacks USB Type-C — are worth acknowledging, and they naturally narrow the audience to those building a straightforward single-GPU system rather than a heavily expanded workstation. For that target use case, the B840M Eagle WiFi 6 is a well-rounded and capable choice.