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MSI · AM5 · B840

MSI B840 Gaming Plus WiFi

ATX · DDR5 · 4 DIMMs · 7-phase VRM · 7

Quality
51
VRM
22
Value
61
Amazon
$160
MSI B840 Gaming Plus WiFi
View MSI B840 Gaming Plus WiFi Gallery in high resolution
$160
Available Updated 3 days, 10 hours ago Prime FBA
Overall51.0
VRM22.0
Chipset71.0
Expansion / storage64.0
Connectivity58.0
Audio40.0
Quality / price60.6
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Written analysis

MSI B840 Gaming Plus WiFi at a glance

The MSI B840 Gaming Plus WiFi uses the ATX form factor, AM5 socket, and 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 4 DIMM slots, with up to 256 GB and rated overclocked speeds up to 8000 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 22.0, placing the power delivery in the basic class. The board lists 7 CPU power phases, 60 A power stages in a 7+2+1 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 64.0: balanced . The platform supports PCIe 4.0. Physical expansion includes 5 ×16 slots.

On-board storage consists of 2 M.2 slots and 4 SATA ports. Supported M.2 lengths are listed as 22110, 2280, 2260. 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 58.0, rated adequate . Wireless networking is Wi-Fi 7 ; wired networking is Realtek® 8125BG 2.5G LAN at up to 2500 Mbps. Bluetooth 5.4 is included. The recorded USB provision is 8 rear connections and 7 front-panel connections. 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 40.0. This is a standard onboard solution using Realtek® ALC897. It covers normal gaming and communication; demanding headphones or production work still benefit from an external interface.

Buying verdict

Overall quality is 51.00, a mainstream result. The essential platform features are covered, while premium I/O and tuning extras are more selective.

At the recorded Amazon price, the quality-to-price score is 60.6—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
MSI
Motherboard
MSI B840 Gaming Plus WiFi
Chipset / socket
B840 / AM5
Form factor
ATX
Launch price
—
Amazon price
$160
Availability
In stock
Price updated
3 days, 10 hours ago

VRM

CPU phases
7 (60 A)
Power design
7+2+1
EPS connector
1

Memory

Type / slots
DDR5 / 4 DIMMs
Max capacity / OC
256 GB / 8000 MT/s
Per DIMM
64 GB
XMP / EXPO
Yes

PCIe

Supported version
PCIe 4.0
x16 physical
5
x16 Gen 4
1
x16 Gen 3
4

Storage

M.2 slots
2
M.2 lengths
22110, 2280, 2260
SATA ports
4

Display outputs

HDMI
Yes · 2.1 · 4K 60Hz
DisplayPort
No
USB-C DisplayPort
No

USB

Rear USB 2.0
4
Rear USB 3.2 Gen 1 Type-A 5 Gbps
2
Rear USB 3.2 Gen 2 Type-A 10 Gbps
1
Rear USB 3.2 Gen 2 Type-C 10 Gbps
1
Front USB 2.0
4
Front USB 3.2 Gen 1 Type-A 5 Gbps
2
Front USB 3.2 Gen 1 Type-C 5 Gbps
1
Header USB 2.0
4
Header USB 3.2 Gen 1 Type-A 5 Gbps
3

Networking

Ethernet
Realtek® 8125BG 2.5G LAN
LAN ports
1
LAN speed
2500 Mbps
Wi-Fi
7
Wi-Fi bandwidth
320MHz
Bands
2.4GHz, 5GHz, 6GHz
Bluetooth
5.4

Audio

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

Buttons

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

Additional information

Memory notes
Supports Un-buffered memory. Supports AMD EXPO. Supports CUDIMM in Clock Driver bypass mode only, with support and boot frequency varying by CPU. For Ryzen™ 9000 Series, max OC frequency depends on configuration: 1DPC 1R up to 8000+, 1DPC 2R up to 6400+, 2DPC 1R up to 6400+, 2DPC 2R up to 4800+. Compatibility depends on CPU/memory; refer to the official support list.
Display notes
Available only on processors featuring integrated graphics. Graphics specifications may vary depending on the CPU installed.
Expansion notes
PCI_E1 Gen PCIe 4.0 supports up to x16 (From CPU) PCI_E2 Gen PCIe 3.0 supports up to x1 (From Chipset) PCI_E3 Gen PCIe 3.0 supports up to x1 (From Chipset) PCI_E4 Gen PCIe 3.0 supports up to x4 (From Chipset) PCI_E5 Gen PCIe 3.0 supports up to x1 (From Chipset) PCI_E1 slot • Supports PCIe 4.0 x16 (For Ryzen™ 9000/ 7000 Series processors) • Supports PCIe 4.0 x8 (For Ryzen™ 8700/ 8600/ 8400 Series processors) • Supports PCIe 4.0 x4 (For Ryzen™ 8500/ 8300 Series processor)
M.2_1
4.0 4 · 2280, 2260 · From CPU
M.2_2
4.0 4 · 22110, 2280, 2260 · From CPU — The M2_2 slot's speed is dependent on the installed CPU: Supports up to PCIe 4.0 x4 for Ryzen™ 9000/7000 Series, up to PCIe 3.0 x4 for Ryzen™ 8700/8600/8400 Series, and up to PCIe 3.0 x2 for Ryzen™ 8500/8300 Series processors.
Storage notes
Please refer to the manual for M.2 SSD heatsink restrictions.
Audio notes
7.1-Channel High Definition Audio
Networking notes
The Wireless module is pre-installed in the M.2 (Key-E) slot. Supports MU-MIMO TX/RX, up to 5.8Gbps. Supports 802.11 a/ b/ g/ n/ ac/ ax/ be. Bluetooth supports MLO and 4KQAM. 6GHz band support may depend on every country’s regulations and Wi-Fi 7 will be ready in Windows 11 version 24H2. The Bluetooth version may be updated, please refer to the Wi-Fi chipset vendor’s website for details. Bluetooth 5.4 will be ready in Windows 11 version 24H2.
Button notes
The text lists a 'Flash BIOS Button' which is equivalent to a BIOS Flashback button.
Fan / RGB headers
1 CPU · — OPT · 1 AIO · 4 chassis · 2 ARGB · 1 RGB
Other headers
Front audio · System panel · TPM
Dimensions
30.5 cm x 24.4 cm

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

Amazon

Price history

Nearby quality

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VRM fit

VRM-appropriate CPUs

AM5 processors whose TDP sits in this board’s VRM window. Socket match is required; chipset extras still matter on sTR5. This is a power-delivery filter, not a ranked CPU guide.

Open AM5 CPUs in the CPU table

Discussion

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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.

Memory

4x DDR5 UDIMM, Maximum Memory Capacity 256GB
Memory Support DDR5 8000 - 5600 (OC) MT/s / 5600 - 4800 (JEDEC) MT/s
Ryzen™ 9000 Series Processors max. overclocking frequency:
• 1DPC 1R Max speed up to 8000+ MT/s
• 1DPC 2R Max speed up to 6400+ MT/s
• 2DPC 1R Max speed up to 6400+ MT/s
• 2DPC 2R Max speed up to 4800+ MT/s

Supports AMD POR Speed and JEDEC Speed
Supports Memory Overclocking and AMD EXPOTM
Supports Dual-Channel mode
Supports Non-ECC, Un-buffered memory
Supports CUDIMM, Clock Driver bypass mode only*

* CUDIMM support and POR boot frequency may vary by CPU series, with manual overclocking available after boot. Certain CPUs may fail to boot, but future BIOS updates will improve compatibility.
• Memory compatibility and supported speeds can vary depending on the CPU and memory configuration. For detailed information, please refer to the Memory Compatibility List available on the product’s Support page or visit https://www.msi.com/support/.

Graphics

1x HDMI™
Support HDMI™ 2.1, maximum resolution of 4K 60Hz*
*Available only on processors featuring integrated graphics. Graphics specifications may vary depending on the CPU installed.

Expansion slots

5x PCI-E x16 slot
PCI_E1 Gen PCIe 4.0 supports up to x16 (From CPU)
PCI_E2 Gen PCIe 3.0 supports up to x1 (From Chipset)
PCI_E3 Gen PCIe 3.0 supports up to x1 (From Chipset)
PCI_E4 Gen PCIe 3.0 supports up to x4 (From Chipset)
PCI_E5 Gen PCIe 3.0 supports up to x1 (From Chipset)

PCI_E1 slot
• Supports PCIe 4.0 x16 (For Ryzen™ 9000/ 7000 Series processors)
• Supports PCIe 4.0 x8 (For Ryzen™ 8700/ 8600/ 8400 Series processors)
• Supports PCIe 4.0 x4 (For Ryzen™ 8500/ 8300 Series processor)

Storage

2x M.2
M.2_1 Source (From CPU) supports up to PCIe 4.0 x4 , supports 2280/2260 devices
M.2_2 Source (From CPU) supports up to PCIe 4.0 x4 , supports 22110/2280/2260 devices
4x SATA 6G

M2_2 slot
• Supports up to PCIe 4.0 x4 (For Ryzen™ 9000/ 7000 Series processors)
• Supports up to PCIe 3.0 x4 (For Ryzen™ 8700/ 8600/ 8400 Series processors)
• Supports up to PCIe 3.0 x2 (For Ryzen™ 8500/ 8300 Series processor)

*Please refer to the manual for M.2 SSD heatsink restrictions.

USB

4x USB 2.0 (Rear)
4x USB 2.0 (Front)
2x USB 5Gbps Type A (Rear)
2x USB 5Gbps Type A (Front)
1x USB 5Gbps Type C (Front)
1x USB 10Gbps Type A (Rear)
1x USB 10Gbps Type C (Rear)

Internal I/O

1x Power Connector(ATX_PWR)
1x Power Connector(CPU_PWR)
1x CPU Fan
1x Combo Fan (Pump_Sys Fan)
4x System Fan
1x EZ Conn-header (JAF_1)
2x Front Panel (JFP)
1x Chassis Intrusion (JCI)
1x Front Audio (JAUD)
1x Com Port (JCOM)
1x Tuning Controller connector(JDASH)
2x Addressable V2 RGB LED connector (JARGB_V2)
1x RGB LED connector(JRGB)
1x TPM pin header(Support TPM 2.0)
4x USB 2.0 ports
2x USB 5Gbps Type A ports
1x USB 5Gbps Type C ports

Rear I/O

Clear CMOS Button
USB 10Gbps (Type-A)
USB 2.0
2.5G LAN
Wi-Fi / Bluetooth
Audio connectors
Flash BIOS Button
HDMI™ 2.1 Port
USB 10Gbps (Type-C)
USB 5Gbps (Type-A)

Wireless

Wi-Fi 7 Solution
The Wireless module is pre-installed in the M.2 (Key-E) slot
Supports MU-MIMO TX/RX, 2.4GHz/ 5GHz/ 6GHz* (320MHz) up to 5.8Gbps
Supports 802.11 a/ b/ g/ n/ ac/ ax/ be

Supports Bluetooth® 5.4**, MLO, 4KQAM

* 6GHz band support may depend on every country’s regulations and Wi-Fi 7 will be ready in Windows 11 version 24H2.
** The Bluetooth version may be updated, please refer to the Wi-Fi chipset vendor’s website for details. Bluetooth 5.4 will be ready in Windows 11 version 24H2.

Audio

Realtek® ALC897
7.1-Channel High Definition Audio

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