B840M GAMING PLUS WIFI6E
The MSI B840M GAMING PLUS WIFI6E is a Micro ATX AM5 motherboard on the B840 chipset. It supports DDR5 memory up to 8,000 MT/s and 2 M.2 slots. Full specs, power delivery, and current prices are below.
Prices update regularly and may differ at the retailer. This page contains affiliate links.
MaxMyBuild scores
How we score →How well the B840M GAMING PLUS WIFI6E is equipped for gaming and for productivity, scored 0–100 from its specs. Scores are fit-for-purpose: a capable board can top the gaming score without being the most expensive.
Weighs CPU power delivery, memory speed support, the GPU PCIe slot, Wi-Fi version, and M.2 storage — the things that actually matter for a gaming build.
Rewards fast, plentiful M.2 storage and USB I/O, PCIe expansion, memory capacity and slots — what matters for content creation and heavy multitasking.
CPU power
167 W
Limited · 0.7x
Wired for about 167 W, roughly 73% of the 230 W that the top Ryzen 9 chips pull. Pair it with a mid-range processor rather than a flagship. The figure comes from its 7+2+1 power-stage (VRM) layout and 8 EPS connectors. It is a rating of what the board is built to deliver, not a measurement, so treat it as headroom rather than a guarantee.
Specifications
Platform
- Chipset
- B840
- Socket
- AM5
- Form factor
- Micro ATX
- MSRP
- $139.00
Memory
- Type
- DDR5
- Slots
- 4
- Max speed
- 8,000 MT/s
- Max capacity
- 256 GB
- Channels
- 2-channel
- ECC / memory
- UDIMM
Power & VRM
- CPU power
- 167 W
- Phase config
- 7+2+1
- VRM stages
- 1H/1L
- EPS power
- 8
- VRM heatsink
- Partial (single bank)
Storage & Expansion
- M.2 slots
- 2
- M.2 layout
- 2× PCIe 4.0 ×4
- M.2 heatsinks
- Slots 1
- SATA ports
- 4 SATA3
- PCIe ×16 slots
- 1× PCIe 4.0 ×16, 1× PCIe 3.0 ×4
Ethernet & Wi-Fi
- Realtek RTL8125D
- 2.5 GbE
- Ethernet ports
- 1
- Wi-Fi
- Wi-Fi 6E
USB & I/O
- Front USB-C
- 1× 5Gbps
Audio & Video
- Audio codec
- ALC897
- Audio jacks
- 3
- S/PDIF out
- Yes
- HDMI
- 1 port
- DisplayPort
- None
- USB-C video
- None
Cooling, RGB & Design
- Fan headers
- 5
- 12V RGB headers
- 1
- 5V ARGB headers
- 3
Onboard & Diagnostics
- BIOS Flashback
- Yes (Rear)
- Diagnostics
- Debug LEDs
- Onboard buttons
- Clear CMOS
Compare the B840M GAMING PLUS WIFI6E against every other board on the motherboard comparison table. Not sure it fits your chip? The socket compatibility guide explains AM5 pairings.
Where to buy the B840M GAMING PLUS WIFI6E
Every in-stock retailer offer we track, cheapest first.
| Retailer | Availability | Price | Buy |
|---|---|---|---|
| Newegg | In stock | $259.99 |  |
The B840M GAMING PLUS WIFI6E starts from $259.99 across 1 retailer (Wi-Fi 6E). Prices update daily from live stock.
Which CPUs fit the B840M GAMING PLUS WIFI6E?
Compare all CPUs →In-stock AM5 processors this board can run, socket-matched and within its 167 W power budget, ranked by gaming value (performance per dollar).
| Processor | Cores | Gaming | From | |
|---|---|---|---|---|
 | Ryzen 5 9600X AMD | 6/12 | 72.6 | $173.00 |
 | Ryzen 5 7600X AMD | 6/12 | 67.3 | $163.00 |
 | Ryzen 5 8500G AMD | 6/12 | 52.0 | $146.99 |
 | Ryzen 5 8400F AMD | 6/12 | 50.0 | $149.00 |
 | Ryzen 5 7500F AMD | 6/12 | 61.0 | $189.99 |
 | Ryzen 5 7600 AMD | 6/12 | 63.4 | $209.00 |
 | Ryzen 7 7700X AMD | 8/16 | 70.6 | $233.00 |
 | Ryzen 5 8600G AMD | 6/12 | 55.0 | $186.30 |
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