Gigabyte B840M GAMING X WIFI6E — AM5 Micro-ATX with 2.5GbE and Wi-Fi 6E
AMD B840 · Socket AM5DDR5 up to 8200 MT/s (OC)2.5GbE · Wi-Fi 6E2x M.2 PCIe 4.0
The Gigabyte B840M GAMING X WIFI6E (part number B840M GAMING X WF6E) is a Micro-ATX motherboard for AMD Socket AM5, based on the entry B840 chipset and compatible with Ryzen 9000, 8000 and 7000 processors — a cost-effective base for compact gaming and home-office PCs.
An 8+2+2 digital VRM on a 6-layer PCB drives mainstream Ryzen 5 and Ryzen 7 chips, and four DDR5 slots take up to 256GB with EXPO/XMP kits up to 8200 MT/s (OC). Both M.2 slots are wired to the CPU at PCIe 4.0 x4.
Connectivity covers Realtek 2.5GbE LAN, MediaTek Wi-Fi 6E with Bluetooth 5.3, HDMI 2.1 plus two DisplayPort 1.4 outputs for up to three monitors on Ryzen integrated graphics, and a front USB-C header.
Compatibility note: The B840 chipset has no CPU overclocking and its chipset link and USB are limited to PCIe 3.0 / USB 3.2 Gen 1 — rear USB tops out at 5 Gbps and the second x16-length slot runs PCIe 3.0 x4. The graphics slot and M.2 run at PCIe 4.0, not 5.0. Video outputs need a Ryzen CPU with integrated graphics.
Best For
✓ Budget Ryzen 5 / Ryzen 7 gaming PCs
✓ Compact Micro-ATX office and home builds
✓ Triple-monitor workstations on Ryzen iGPU
✓ Wireless desks without Ethernet cabling
✓ First-time AM5 builders upgrading from AM4
✓ Small-business desktops with 2.5GbE
Key Features
8+2+2 digital VRM
Digital power design with premium chokes and capacitors on a 6-layer PCB — enough headroom for Ryzen 5/7 and non-X3D Ryzen 9 at stock settings.
Two CPU-attached M.2 slots
M2A (2580/2280) and M2B (22110/2280), both PCIe 4.0 x4 from the CPU for full-speed Gen4 NVMe; plus four SATA 6Gb/s ports and NVMe RAID 0/1/5/10.
2.5GbE + Wi-Fi 6E
Realtek 2.5GbE for fast wired transfers and MediaTek MT7902 Wi-Fi 6E (2.4/5/6 GHz, 160 MHz) with Bluetooth 5.3 for cable-free setups.
Triple display outputs
HDMI 2.1 (4096x2160@60) and two DisplayPort 1.4 (3840x2160@144) drive up to three screens straight from Ryzen Radeon graphics.
Technical Specifications
| Identification |
| Part Number |
B840M GAMING X WF6E |
| EAN/GTIN |
4719331879754 |
| MPN |
B840M GAMING X WIFI6E |
| Brand |
Gigabyte |
| Processor & Chipset |
| Socket |
AMD AM5 |
| Supported CPUs |
Ryzen 9000 / 8000 / 7000 Series |
| Chipset |
AMD B840 |
| VRM |
8+2+2 digital, 6-layer PCB |
| CPU power |
1x 8-pin ATX 12V + 24-pin ATX |
| Memory |
| Slots |
4x DDR5 DIMM, dual channel |
| Maximum |
256GB (64GB per DIMM) |
| Speed |
5600–6400 MT/s, up to 8200 MT/s (OC) |
| Type |
Non-ECC unbuffered 1Rx8/2Rx8/1Rx16 · AMD EXPO and XMP |
| Expansion & Storage |
| PCIe x16 (CPU) |
1x PCIe 4.0 x16 |
| PCIe x16 (chipset) |
1x PCIe 3.0, runs x4 |
| M.2 |
M2A_CPU PCIe 4.0 x4 (2580/2280) · M2B_CPU PCIe 4.0 x4 (22110/2280) |
| SATA |
4x SATA 6Gb/s |
| RAID |
NVMe RAID 0/1/5/10 (RAID 5 on Ryzen 9000) · SATA RAID 0/1/10 |
| Networking & Audio |
| LAN |
Realtek 2.5GbE |
| Wireless |
MediaTek Wi-Fi 6E MT7902 (2.4/5/6 GHz, 160 MHz) + Bluetooth 5.3 |
| Audio |
Realtek HD audio codec, 7.1-channel |
| Rear I/O |
| USB |
1x USB-C 3.2 Gen 1 · 2x USB-A 3.2 Gen 1 · 4x USB 2.0 |
| Video |
1x HDMI 2.1 (4096x2160@60) · 2x DisplayPort 1.4 (3840x2160@144) |
| Other |
PS/2 · RJ-45 · 2x antenna (1T1R) · 3 audio jacks · Q-Flash Plus button |
| Internal Connectors |
| USB headers |
1x USB-C 3.2 Gen 1 · 1x USB 3.2 Gen 1 · 2x USB 2.0 |
| Fans & RGB |
CPU fan · CPU fan/pump · system fan · system fan/pump · 2x ARGB Gen2 · 1x RGB |
| Other |
4x SATA · TPM header (GC-TPM2.0 SPI V2) |
| General |
| Form factor |
Micro-ATX, 24.4 x 24.4 cm |
| BIOS |
256 Mbit AMI UEFI · Q-Flash Plus |
| OS |
Windows 11 64-bit · Windows 10 64-bit |
| Software |
GIGABYTE Control Center |
Frequently Asked Questions
Does the B840M GAMING X WIFI6E support the Ryzen 7 9800X3D?
Yes, all Ryzen 9000 AM5 processors are supported (check the CPU support list for the required BIOS). The B840 chipset does not allow CPU overclocking, but X3D chips run at full stock boost.
What is the difference between B840 and B850?
B850 adds CPU overclocking, a PCIe 4.0 chipset link and more high-speed USB and lanes. B840 keeps PCIe 4.0 for the graphics card and CPU M.2 slots but uses PCIe 3.0 / USB 3.2 Gen 1 from the chipset.
How is it different from the B840M GAMING PLUS WIFI6E?
The GAMING X has 2.5GbE instead of 1GbE, a PS/2 port, four rear USB 2.0 ports and a PCIe 3.0 x4 second slot, while the GAMING PLUS adds a 10 Gbps rear USB-A but only 1GbE and a PCIe x1 slot.
Does it work with Windows 10?
Yes, Gigabyte lists both Windows 11 and Windows 10 64-bit support.
Singular Expert Insight
A sensible value AM5 board: 2.5GbE and Wi-Fi 6E on a Micro-ATX PCB, with the two Gen4 M.2 slots most builders actually use. It is not for overclockers or Gen5 SSDs — for those step up to a B850 board. Add a 32GB DDR5-6000 kit from our
DDR5 memory range.
✓ Buy it if you want an affordable AM5 Micro-ATX board with Wi-Fi 6E and 2.5GbE for a Ryzen 5/7 gaming or office PC.
✕ Skip it if you plan to overclock, use PCIe 5.0 SSDs or need 10 Gbps USB on the rear panel.
→ Also consider the B840M D3HP WIFI6E for a lower price, or B850 boards such as the B850M AORUS STEALTH for overclocking and Gen5.