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GIGABYTE · AM5 · B840

Gigabyte B840M D2H

Micro-ATX · DDR5 · 2 DIMMs · 5-phase VRM

Quality
42
VRM
14
Value
48
Amazon
$168
Gigabyte B840M D2H
View Gigabyte B840M D2H Gallery in high resolution
$168
Available Updated 3 days, 7 hours ago
Overall42.2
VRM14.0
Chipset65.0
Expansion / storage55.0
Connectivity32.0
Audio45.0
Quality / price47.7
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Written analysis

Gigabyte B840M D2H at a glance

The Gigabyte B840M D2H uses the Micro-ATX form factor, AM5 socket, and AMD B840 chipset. This is a balanced mainstream platform: enough expansion and connectivity for a performance PC without paying only for flagship extras.

Memory support is DDR5 across 2 DIMM slots, with up to 128 GB and rated overclocked speeds up to 7600 MT/s. XMP / EXPO memory-profile support is recorded for easier tuning.

Best fit: a mainstream gaming, home, or office system with moderate expansion needs.

Power delivery

The calculated VRM score is 14.0, placing the power delivery in the basic class. The board lists 5 CPU power phases, 60 A power stages in a 5+2+2 layout. CPU power input is listed as 1. Keep it paired with lower-power processors and avoid sustained overclocked loads.

Expansion and storage

The expansion and storage score is 55.0: focused on the essentials. The platform supports PCIe 4.0. Physical expansion includes 2 ×16 slots.

On-board storage consists of 2 M.2 slots and 4 SATA ports. Supported M.2 lengths are listed as 2580, 2280. The two-slot layout covers a typical OS-and-games or OS-and-project-drive setup.

Connectivity and rear I/O

The connectivity score is 32.0, rated essential. There is no recorded onboard Wi-Fi ; wired networking is Realtek® 2.5GbE LAN chip (2.5 Gbps/1 Gbps/100 Mbps) at up to 2500 Mbps. The recorded USB provision is 6 rear connections; a front-panel total is not recorded. The specification sheet below separates every USB speed and connector type.

Display connectivity includes HDMI 2.1. These motherboard outputs require a processor with integrated graphics.

Audio

The audio score is 45.0. This is a standard onboard solution using Realtek® ALC892/ALC897. It covers normal gaming and communication; demanding headphones or production work still benefit from an external interface. The rear panel has 3 analogue jacks.

Buying verdict

Overall quality is 42.20, a basic but usable result for office, media, and budget gaming systems.

At the recorded Amazon price, the quality-to-price score is 47.7—a balanced value for its feature class.

Board data

Full specifications

Platform, expansion, storage, rear I/O, internal headers, networking, audio, and board controls in one sheet.

General

Manufacturer
GIGABYTE
Motherboard
Gigabyte B840M D2H
Chipset / socket
AMD B840 / AM5
Form factor
Micro-ATX
Launch price
—
Amazon price
$168
Availability
In stock
Price updated
3 days, 7 hours ago

VRM

CPU phases
5 (60 A)
Power design
5+2+2
EPS connector
1

Memory

Type / slots
DDR5 / 2 DIMMs
Max capacity / OC
128 GB / 7600 MT/s
Per DIMM
64 GB
XMP / EXPO
Yes

PCIe

Supported version
PCIe 4.0
x16 physical
2
x16 Gen 4
1
x16 Gen 3
1

Storage

M.2 slots
2
M.2 lengths
2580, 2280
SATA ports
4

Display outputs

HDMI
Yes · 2.1 · 4096x2160@60 Hz
DisplayPort
No
USB-C DisplayPort
No

USB

Rear USB 2.0
4
Rear USB 3.2 Gen 1 Type-A 5 Gbps
2
Header USB 2.0
4
Header USB 3.2 Gen 1 Type-A 5 Gbps
2

Networking

Ethernet
Realtek® 2.5GbE LAN chip (2.5 Gbps/1 Gbps/100 Mbps)
LAN ports
1
LAN speed
2500 Mbps
Wi-Fi
Not included
Bluetooth
No

Audio

Chipset
Realtek® ALC892/ALC897
Analog jacks
3
Gold-plated jacks
No
Optical S/PDIF
No
Spatial audio
No

Buttons

BIOS flashback
No
Clear CMOS
No
Q-Flash Plus
Yes
Smart button
No
Onboard start / reset
No

Additional information

CPU support
AMD Socket AM5, support for: AMD Ryzen™ 9000 Series Processors/ AMD Ryzen™ 8000 Series Processors/ AMD Ryzen™ 7000 Series Processors (Go to GIGABYTE's website for the latest CPU support list.)
OS support
Support for Windows 11 64-bitSupport for Windows 10 64-bit
Memory notes
Supports non-ECC Un-buffered DIMM 1Rx8/2Rx8/1Rx16 memory modules. Also supports AMD EXtended Profiles for Overclocking (AMD EXPO™). The CPU and memory configuration may affect the supported memory types, data rate (speed), and number of DRAM modules; refer to the manufacturer's website for the Memory Support List.
Display notes
Integrated Graphics Processor with AMD Radeon™ Graphics support. The HDMI port supports HDCP 2.3, HDR, and native HDMI 2.1 TMDS compatible ports. Graphics specifications may vary depending on CPU support.
Expansion notes
The primary PCIEX16 slot's operating mode is CPU-dependent: AMD Ryzen 9000/7000 Series support PCIe 4.0 x16 mode; AMD Ryzen 8000 Series-Phoenix 1 Processors support PCIe 4.0 x8 mode; AMD Ryzen 8000 Series-Phoenix 2 Processors support PCIe 4.0 x4 mode. The second physical x16 slot (PCIEX4) is connected to the chipset and runs at PCIe 3.0 x4 speed.
M2A_CPU
4.0 4 · 2580, 2280 · CPU — Functionality depends on the installed CPU. AMD Ryzen 9000/8000/7000 Series Processors support PCIe 4.0 x4/x2 SSDs in this slot.
M2C_SB
3.0 2 · 2280 · Chipset
RAID
SATA / PCIe (0, 1, 5, 10)
Storage notes
RAID 5 for NVMe SSDs is only available on AMD Ryzen 9000 Series Processors.
USB notes
USB 2.0 ports are also compatible with USB 1.1.
Audio notes
High Definition Audio. Supports 2/4/5.1/7.1-channel configurations. The functionality of an audio jack can be changed using the audio software; 7.1-channel audio requires configuration via the audio software.
Button notes
The board includes a reset jumper and a Clear CMOS jumper.
Fan / RGB headers
1 CPU · 1 OPT · — AIO · 1 chassis · 2 ARGB · 1 RGB
Other headers
Front audio · System panel · TPM
Dimensions
Micro ATX Form Factor; 24.4cm x 24.4cm

Extracted notes sit here. Official manufacturer copy is at the bottom of the page.

Amazon

Price history

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Vendor copy

Official manufacturer data

Raw manufacturer text kept for reference. Structured specs above are extracted from this copy and are the source for scores and tables.

CPU support

AMD Socket AM5, support for:
AMD Ryzen™ 9000 Series Processors/
AMD Ryzen™ 8000 Series Processors/
AMD Ryzen™ 7000 Series Processors
(Go to GIGABYTE's website for the latest CPU support list.)

Memory

Support for DDR5 7600(O.C.) / 7200(OC)/ 7000(OC)/ 6800(OC)/ 6666(OC)/ 6600(OC)/ 6400(OC)/ 6200(OC)/ 6000(OC)/ 5600(OC)/ 5200/ 4800/ 4400 MT/s memory modules
2 x DDR5 DIMM sockets supporting up to 128 GB (64 GB single DIMM capacity) of system memory
Dual channel memory architecture
Support for non-ECC Un-buffered DIMM 1Rx8/2Rx8/1Rx16 memory modules
Support for AMD EXtended Profiles for Overclocking (AMD EXPO™) and Extreme Memory Profile (XMP) memory modules
(The CPU and memory configuration may affect the supported memory types, data rate (speed), and number of DRAM modules, please refer to "Memory Support List" on GIGABYTE's website for more information.)

Graphics

Integrated Graphics Processor with AMD Radeon™ Graphics support:
- 1 x HDMI port, supporting a maximum resolution of 4096x2160@60 Hz
* Support for HDMI 2.1 version, HDCP 2.3, and HDR.
** Support for native HDMI 2.1 TMDS compatible ports.
(Graphics specifications may vary depending on CPU support.)

Expansion slots

1 x PCI Express x16 slot (PCIEX16), integrated in the CPU:
AMD Ryzen™ 9000/7000 Series Processors support PCIe 4.0 x16 mode
AMD Ryzen™ 8000 Series-Phoenix 1 Processors support PCIe 4.0 x8 mode
AMD Ryzen™ 8000 Series-Phoenix 2 Processors support PCIe 4.0 x4 mode
* The PCIEX16 slot can only support a graphics card or an NVMe SSD. If only one graphics card is to be installed, be sure to install it in the PCIEX16 slot.
Chipset:
- 1 x PCI Express x16 slot, supporting PCIe 3.0 and running at x4 (PCIEX4)

Storage

1 x M.2 connector (M2A_CPU), integrated in the CPU, supporting Socket 3, M key, type 2580/2280 SSDs:
AMD Ryzen™ 9000/7000 Series Processors support PCIe 4.0 x4/x2 SSDs
AMD Ryzen™ 8000 Series-Phoenix 1 Processors support PCIe 4.0 x4/x2 SSDs
AMD Ryzen™ 8000 Series-Phoenix 2 Processors support PCIe 4.0 x4/x2 SSDs
1 x M.2 connector (M2C_SB), integrated in the Chipset, supporting Socket 3, M key, type 2280 PCIe 3.0 x2 SSDs
4 x SATA 6Gb/s connectors
RAID 0, RAID 1, RAID 5, and RAID 10 support for NVMe SSD storage devices
* RAID 5 is only available on AMD Ryzen™ 9000 Series Processors.
RAID 0, RAID 1, and RAID 10 support for SATA storage devices

USB

CPU:
- 2 x USB 3.2 Gen 1 ports on the back panel
CPU+USB 2.0 Hub:
- 4 x USB 2.0/1.1 ports on the back panel
Chipset:
- 2 x USB 3.2 Gen 1 ports available through the internal USB header
- 4 x USB 2.0/1.1 ports available through the internal USB headers

Internal I/O

1 x 24-pin ATX main power connector
1 x 8-pin ATX 12V power connector
1 x CPU fan header
1 x CPU fan/water cooling pump header
1 x system fan header
2 x addressable RGB Gen2 LED strip headers
1 x RGB LED strip header
4 x SATA 6Gb/s connectors
2 x M.2 Socket 3 connectors
1 x front panel header
1 x front panel audio header
1 x USB 3.2 Gen 1 header
2 x USB 2.0/1.1 headers
1 x Trusted Platform Module header (For the GC-TPM2.0 SPI/GC-TPM2.0 SPI 2.0/GC-TPM2.0 SPI V2 module only)
1 x reset jumper
1 x Clear CMOS jumper

Rear I/O

1 x PS/2 keyboard/mouse port
2 x USB 3.2 Gen 1 ports
4 x USB 2.0/1.1 ports
1 x HDMI port*
1 x Q-Flash Plus button
1 x RJ-45 port
3 x audio jacks
* Actual support may vary by CPU.

Audio

Realtek® Audio CODEC
High Definition Audio
2/4/5.1/7.1-channel
* You can change the functionality of an audio jack using the audio software. To configure 7.1-channel audio, access the audio software for audio settings.

Special features

Support for GIGABYTE Control Center (GCC)
* Available applications in GCC may vary by motherboard model. Supported functions of each application may also vary depending on motherboard specifications.
Support for Q-Flash
Support for Q-Flash Plus
Support for Smart Backup

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