Gigabyte B840M D2H (Socket AM5) DDR5 Micro-ATX Motherboard

Manufacturer: Gigabyte | Model: B840M | Product ID: 4418
£6.00 (inc. VAT)
Availability: 0 in stock

Product Technical Specification

Lighting
Lighting / RGBNo
Motherboard
Motherboard ChipsetAMD B840
Dual BIOSNo
Built-In I/O ShieldNo
Water Cooling
WatercoolingNo
Form Factor
Motherboard formfactorMicro-ATX
Back Connect
Back ConnectNo
Colour
Primary ColourSilver
CPU
CPU ManufacturerAMD
CPU SocketAM5
Wi-Fi & LAN
LANYes
LAN Ports1x (in total)
Wi-Fi / BluetoothNo
Memory
Max. Memory192 GB
Memory TypeDDR5
Memory Form FactorDIMM
Max. Memory Speed (Standard)5200 MT/s
Max. Memory Speed (OC)7600 MT/s
EEC SupportNo
Memory slots4x
Fan Header
4 Pin Fan Connectors1
Expansion Slots
PCIe x16 slots (total)2
PCIe 4.0 x16 mechanical slot1
PCIe 3.0 x16 mechanical slot1
Storage Ports
M.2 PCIe 3.0 x21
M.2 PCIe 4.0 x41
SATA 6G (internal)4
Internal Ports
CPU Power Supply1x 8-Pin
USB 3.0 (internal) Header1
USB 2.0 (internal) Header2
Front Panel Audio HeaderYes
Cooling
BackplateNo
M.2 HeatsinksNo
VRM HeatsinksNo
External Ports
USB 3.0 (external) Type A2
USB 2.0 (external) Type A4
Display ConnectorsHDMI (1x)

Delivery Options

Economy Delivery
FREE
Economy Delivery

Economy Delivery (UK)

Estimated delivery date: Mon 31st Aug 2026 to Thu 03rd Sep 2026
Fast & Tracked by Courier
£6.95
Fast & Tracked by Courier

Fast & Tracked by Courier (UK)

Estimated delivery date: Sun 30th Aug 2026 to Tue 01st Sep 2026
View all Delivery Options & International Rates
Category Details
CPU AMD Socket AM5, supports AMD Ryzen™ 9000 / 8000 / 7000 Series Processors.
(Check GIGABYTE website for latest CPU support list.)
Chipset AMD B840
Memory DDR5 7600(O.C.) – 4400 MT/s, 2 DIMM slots, up to 128 GB (64 GB per DIMM), dual channel, non-ECC 1Rx8/2Rx8/1Rx16, AMD EXPO™ & XMP compatible.
(Memory type, speed, and number of modules depend on CPU and configuration)
Onboard Graphics Integrated AMD Radeon™ Graphics:
- 1 x HDMI (4096x2160@60Hz, HDMI 2.1, HDCP 2.3, HDR)
(Graphics support depends on CPU)
Audio Realtek® Audio CODEC, High Definition Audio, 2/4/5.1/7.1-channel, configurable via software
LAN Realtek® 2.5GbE LAN (2.5/1/0.1 Gbps) with LAN bandwidth management software
Expansion Slots CPU: 1 x PCIe x16 (PCIe 4.0 x16/8/4 depending on CPU)
Chipset: 1 x PCIe x16 (PCIe 3.0 x4)
Storage Interface CPU: 1 x M.2 PCIe 4.0 x4/x2 (M2A_CPU), 2580/2280
Chipset: 1 x M.2 PCIe 3.0 x2 (M2C_SB), 2280, 4 x SATA 6Gb/s
RAID: NVMe 0/1/5/10 (RAID 5 only Ryzen 9000), SATA 0/1/10
USB CPU: 2 x USB 3.2 Gen1 (back), 4 x USB 2.0/1.1 (back)
Chipset: 2 x USB 3.2 Gen1 (internal), 4 x USB 2.0/1.1 (internal)
Internal I/O Connectors 1 x 24-pin ATX, 1 x 8-pin ATX 12V, CPU/system fan & pump headers, 1 system fan header, 2 x addressable RGB headers, 1 x RGB header, 2 x M.2 sockets, 4 x SATA 6Gb/s, front panel & audio headers, 1 x USB 3.2 Gen1 header, 2 x USB 2.0/1.1 headers, TPM header, reset & Clear CMOS jumpers
Back Panel Connectors 1 x PS/2 keyboard/mouse, 1 x HDMI, 1 x DisplayPort, 1 x Q-Flash Plus, 2 x USB 3.2 Gen1, 4 x USB 2.0/1.1, 1 x RJ-45, 2 x SMA antenna connectors (2T2R), 3 x audio jacks
I/O Controller iTE® I/O Controller Chip
H/W Monitoring Voltage, Temperature, Fan speed, Water flow, Fan fail warning, Fan speed control
BIOS 256 Mbit flash, AMI UEFI BIOS, PnP 1.0a, DMI 2.7, WfM 2.0, SM BIOS 2.7, ACPI 5.0
Unique Features GIGABYTE Control Center (GCC), Q-Flash, Q-Flash Plus, Smart Backup
Bundled Software Norton® Internet Security (OEM version), LAN bandwidth management software
Operating System Windows 11 & Windows 10 64-bit
Form Factor Micro ATX, 24.4cm x 24.4cm
Lighting
Lighting / RGBNo
Motherboard
Motherboard ChipsetAMD B840
Dual BIOSNo
Built-In I/O ShieldNo
Water Cooling
WatercoolingNo
Form Factor
Motherboard formfactorMicro-ATX
Back Connect
Back ConnectNo
Colour
Primary ColourSilver
CPU
CPU ManufacturerAMD
CPU SocketAM5
Wi-Fi & LAN
LANYes
LAN Ports1x (in total)
Wi-Fi / BluetoothNo
Memory
Max. Memory192 GB
Memory TypeDDR5
Memory Form FactorDIMM
Max. Memory Speed (Standard)5200 MT/s
Max. Memory Speed (OC)7600 MT/s
EEC SupportNo
Memory slots4x
Fan Header
4 Pin Fan Connectors1
Expansion Slots
PCIe x16 slots (total)2
PCIe 4.0 x16 mechanical slot1
PCIe 3.0 x16 mechanical slot1
Storage Ports
M.2 PCIe 3.0 x21
M.2 PCIe 4.0 x41
SATA 6G (internal)4
Internal Ports
CPU Power Supply1x 8-Pin
USB 3.0 (internal) Header1
USB 2.0 (internal) Header2
Front Panel Audio HeaderYes
Cooling
BackplateNo
M.2 HeatsinksNo
VRM HeatsinksNo
External Ports
USB 3.0 (external) Type A2
USB 2.0 (external) Type A4
Display ConnectorsHDMI (1x)

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We will despatch your order the very same day if we receive cleared payment by 12:00 pm Mon-Fri.

These delivery estimates apply when you order up to 12:00 pm Mon-Fri (excluding public holidays).

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Our available delivery options*

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Buykingston offers a simple, hassle-free returns policy. If for whatever reason you are not happy with the item purchased, you can return it to us within 14 days of receipt for a refund. This applies to items purchased direct through Buykingston only.

Our 14 Day Returns Money Back Guarantee:
For items returned in resaleable condition, with all original packaging. If an item has been opened for inspection but shows signs of use beyond that, a deduction may apply to reflect the reduced value — see our full Terms & Conditions (Section 12) for details.

Some items are excluded from our money-back guarantee unless they have developed a fault. These include:

- Headphones
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Returns FAQs

What is your returns criteria?
14 days from date of receipt, or expected date of receipt on non-tracked items.

How do I go about returning my order?
Please contact us via our contact page with your order number. We will provide you with an RMA number and return instructions, including your return deadline and whether a freepost label applies to your order.

Do I need to contact you before returning my order?
Yes, to obtain an RMA number before sending anything back.

Does my item have to include its original packaging?
Yes, to qualify for our 14 day money-back guarantee. For faulty items, we understand you may no longer have the original packaging.

Who pays for return postage?
If your item is faulty, damaged, or not as described, we cover reasonable return postage, or provide a freepost label where available. If you are returning an item for another reason (including simply changing your mind), you are responsible for return postage unless we have expressly confirmed a freepost label in your RMA email — we recommend using a tracked and insured service for items of significant value.

Who deals with the warranty on a faulty item?
We will. In some circumstances we may ask you to contact the manufacturer directly for assistance.

Please ensure you have read and comply in full with Sections 11–13 of our Terms & Conditions.