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…
| 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) | £99.95as of | — | — | Amazon |
 MSI B840 GAMING PLUS WIFI MotherboardAM5 · B840 · ATX · DDR5 · WiFi · first available Jan 2025 (1 yr 8 mo old) | £126.99as of | — | — | Amazon |
 MSI PRO B840M-B MotherboardAM5 · B840 · Micro-ATX · DDR5 · first available Jun 2025 (1 yr 2 mo old) | £89.99as of | — | — | Amazon |
 MSI PRO B840-S EVO WIFI6E MotherboardAM5 · B840 · ATX · DDR5 · WiFi · first available Jan 2026 (8 mo old) | £136.99as of | — | — | Amazon |
 ASUS PRIME B840M-A WIFI AMD B840 mATX motherboardAM5 · B840 · Micro-ATX · DDR5 · WiFi · first available Jan 2025 (1 yr 8 mo old) | £109.99as of | — | — | Amazon |
 GIGABYTE B840M D2H MotherboardAM5 · B840 · Micro-ATX · DDR5 · first available Feb 2025 (1 yr 7 mo old) | £84.95as of | — | — | Amazon |
 ASUS PRIME B840-PLUS WIFI AMD B840 ATX motherboardAM5 · B840 · ATX · DDR5 · WiFi · first available Jan 2025 (1 yr 8 mo old) | £139.00as of | — | — | Amazon |
 GIGABYTE B840 EAGLE WIFI6E MotherboardAM5 · B840 · DDR5 · WiFi · first available Sep 2025 (11 mo old) | £128.99as of | — | — | Amazon |
 GIGABYTE B840M AORUS ELITE WIFI6E MotherboardAM5 · B840 · Micro-ATX · DDR5 · WiFi · first available Apr 2025 (1 yr 4 mo old) | £145.99as of | — | — | Amazon |
 ASUS PRIME B840M-A CSM AMD B840 mATX motherboardAM5 · B840 · Micro-ATX · DDR5 · first available Jan 2025 (1 yr 8 mo old) | £134.99as of | — | — | Amazon |
 GIGABYTE B840M DS3H MotherboardAM5 · B840 · Micro-ATX · DDR5 · first available Feb 2025 (1 yr 7 mo old) | £108.85as of | — | — | Amazon |
 GIGABYTE B840M EAGLE WIFI6 MotherboardAM5 · B840 · Micro-ATX · DDR5 · WiFi · first available Apr 2025 (1 yr 4 mo old) | £99.74as of | — | — | Amazon |
MSI B840 Gaming Plus WiFi MotherboardAM5 · B840 · ATX · DDR5 · WiFi · first available Jan 2025 (1 yr 8 mo old) | £221.40as of | — | — | Amazon |
 MSI PRO B840-P WIFI MotherboardAM5 · B840 · ATX · DDR5 · WiFi · first available Jan 2025 (1 yr 8 mo old) | No price | — | — | Amazon |
MSI PRO B840M-B MotherboardAM5 · B840 · Micro-ATX · DDR5 · first available Aug 2025 (1 yr 1 mo old) | No price | — | £80.93 | Amazon |
 GIGABYTE B840 GAMING X WIFI6E MotherboardAM5 · B840 · DDR5 · WiFi · first available Sep 2025 (11 mo old) | No price | — | — | Amazon |