B840 motherboard deals

B840 is the entry-level 800-series AM5 chipset. The graphics slot and M.2 storage run at PCIe 4.0 at most, the chipset's own lanes are PCIe 3.0, and only memory overclocking is supported, not CPU overclocking. It suits a plain Ryzen build where the board simply has to work; B850 is the better buy if you want PCIe 5.0 storage or plan to tune the processor.

Guide: AMD B840 chipset guide — The B840 chipset explained: an entry-level AM5 option with no CPU overclocking and no PCIe 5.0. How it compares with…

16 B840 motherboards tracked · from £84.95 · 1 with a Warehouse offer · showing 1–16

B840 motherboards, most popular

Board	Price	Saving	Warehouse	Buy
MSI PRO B840M-P WIFI6E MotherboardAM5 · B840 · Micro-ATX · DDR5 · WiFi · first available Jun 2025 (1 yr 2 mo old) · RRP £129.99WiFi 6E · 2.5GbE · 2× M.2 · 4 RAM slots · USB-C 10Gbps	£99.95as of 20 Sep, 02:41	—	—	Amazon Compare
MSI B840 GAMING PLUS WIFI MotherboardAM5 · B840 · ATX · DDR5 · WiFi · first available Jan 2025 (1 yr 8 mo old) · RRP £159.99WiFi 7 · 2.5GbE · 2× M.2 · 4 RAM slots · USB-C 10Gbps	£126.99as of 20 Sep, 02:41	—	—	Amazon Compare
MSI PRO B840M-B MotherboardAM5 · B840 · Micro-ATX · DDR5 · first available Jun 2025 (1 yr 2 mo old) · RRP £89.992.5GbE · 2× M.2 · 2 RAM slots	£89.99as of 20 Sep, 02:43	—	—	Amazon Compare
MSI PRO B840-S EVO WIFI6E MotherboardAM5 · B840 · ATX · DDR5 · WiFi · first available Jan 2026 (8 mo old) · RRP £139.99WiFi 6E · 2.5GbE · 2× M.2 · 4 RAM slots · USB-C 10Gbps	£136.99as of 20 Sep, 02:43	—	—	Amazon Compare
ASUS PRIME B840M-A WIFI AMD B840 mATX motherboardAM5 · B840 · Micro-ATX · DDR5 · WiFi · first available Jan 2025 (1 yr 8 mo old) · RRP £193.79WiFi 6E · 2.5GbE · 3× M.2 · BIOS flashback · USB-C 5Gbps	£109.99as of 20 Sep, 02:42	—	—	Amazon Compare
GIGABYTE B840M D2H Motherboard Lowest we've recordedAM5 · B840 · Micro-ATX · DDR5 · first available Feb 2025 (1 yr 7 mo old) · RRP £114.312.5GbE · 2× M.2 · 2 RAM slots	£84.95as of 20 Sep, 02:43	—	—	Amazon Compare
ASUS PRIME B840-PLUS WIFI AMD B840 ATX motherboardAM5 · B840 · ATX · DDR5 · WiFi · first available Jan 2025 (1 yr 8 mo old) · RRP £212.69WiFi 6E · 2.5GbE · 3× M.2 · BIOS flashback · USB-C 10Gbps	£139.00as of 20 Sep, 02:42	—	—	Amazon Compare
GIGABYTE B840 EAGLE WIFI6E Motherboard Lowest we've recordedAM5 · B840 · DDR5 · WiFi · first available Sep 2025 (11 mo old) · RRP £318.99WiFi 6E · 2.5GbE · 3× M.2 · 4 RAM slots	£128.99as of 20 Sep, 02:43	—	—	Amazon Compare
GIGABYTE B840M AORUS ELITE WIFI6E Motherboard Lowest we've recordedAM5 · B840 · Micro-ATX · DDR5 · WiFi · first available Apr 2025 (1 yr 4 mo old) · RRP £190.00WiFi 6E · 2.5GbE · 2× M.2 · 4 RAM slots	£145.99as of 20 Sep, 02:43	—	—	Amazon Compare
ASUS PRIME B840M-A CSM AMD B840 mATX motherboard 30-day lowAM5 · B840 · Micro-ATX · DDR5 · first available Jan 2025 (1 yr 8 mo old) · RRP £173.212.5GbE · 3× M.2 · BIOS flashback · USB-C 5Gbps	£134.99as of 20 Sep, 02:42	—	—	Amazon Compare
GIGABYTE B840M DS3H MotherboardAM5 · B840 · Micro-ATX · DDR5 · first available Feb 2025 (1 yr 7 mo old)2.5GbE · 2× M.2 · 4 RAM slots	£108.85as of 20 Sep, 02:43	—	—	Amazon Compare
GIGABYTE B840M EAGLE WIFI6 MotherboardAM5 · B840 · Micro-ATX · DDR5 · WiFi · first available Apr 2025 (1 yr 4 mo old)WiFi 6 · 2.5GbE · 2× M.2 · 2 RAM slots	£99.74as of 20 Sep, 02:43	—5% under its 90-day usual	—	Amazon Compare
MSI B840 Gaming Plus WiFi MotherboardAM5 · B840 · ATX · DDR5 · WiFi · first available Jan 2025 (1 yr 8 mo old)WiFi 7 · 2.5GbE · 2× M.2 · 4 RAM slots · USB-C 10Gbps	£221.40as of 20 Sep, 02:42	—	—	Amazon Compare
MSI PRO B840-P WIFI MotherboardAM5 · B840 · ATX · DDR5 · WiFi · first available Jan 2025 (1 yr 8 mo old) · RRP £149.99WiFi 7 · 2.5GbE · 2× M.2 · 4 RAM slots · USB-C 10Gbps	No price	—	—	Amazon Compare
MSI PRO B840M-B MotherboardAM5 · B840 · Micro-ATX · DDR5 · first available Aug 2025 (1 yr 1 mo old)2.5GbE · 2× M.2 · 2 RAM slots	No price	—	£80.93	Amazon Compare
GIGABYTE B840 GAMING X WIFI6E MotherboardAM5 · B840 · DDR5 · WiFi · first available Sep 2025 (11 mo old)WiFi 6E · 2.5GbE · 3× M.2 · 4 RAM slots	No price	—	—	Amazon Compare

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