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MSI · AM5 · B850

PRO B850-S WIFI6E

ATX · DDR5 · 4 DIMMs · 12-phase VRM · Wi‑Fi 6E (802.11ax)

Quality
59
VRM
37
Value
80
Amazon
$140
PRO B850-S WIFI6E
View PRO B850-S WIFI6E Gallery in high resolution
$140
Available Updated 3 days, 18 hours ago Prime FBA
Overall59.0
VRM37.0
Chipset86.0
Expansion / storage67.0
Connectivity65.0
Audio40.0
Quality / price80.1
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Written analysis

PRO B850-S WIFI6E at a glance

The PRO B850-S WIFI6E uses the ATX form factor, AM5 socket, and AMD B850 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 8200 MT/s.

Best fit: a mainstream gaming, home, or office system with moderate expansion needs.

Power delivery

The calculated VRM score is 37.0, placing the power delivery in the entry-level class. The board lists 12 CPU power phases, 60 A power stages in a 12 + 2 + 1 layout. CPU power input is listed as 2. It is best paired with mainstream 65–105 W-class processors and good case airflow.

Expansion and storage

The expansion and storage score is 67.0: balanced . The platform supports PCIe 4.0. Physical expansion includes 2 ×16 slots, and 1 ×1.

On-board storage consists of 2 M.2 slots supporting M2_1:PCIe5.0x4(9000/7000)/PCIe4.0x4(8000);M2_2:PCIe4.0x4(9000/8700/8600/8400/7000)/PCIe4.0x2(8500/8300) 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 65.0, rated adequate . Wireless networking is Wi-Fi Wi‑Fi 6E (802.11ax) ; wired networking is Realtek ® 8125 2.5G LAN at up to 2500 Mbps. Bluetooth 5.3 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, DisplayPort 1.4. 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 59.00, 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 80.1—an excellent value relative to the other boards in the catalog.

Board data

Full specifications

Platform, expansion, storage, rear I/O, internal headers, networking, audio, and board controls in one sheet.

General

Manufacturer
MSI
Motherboard
PRO B850-S WIFI6E
Chipset / socket
AMD B850 / AM5
Form factor
ATX
Launch price
—
Amazon price
$140
Availability
In stock
Price updated
3 days, 18 hours ago

VRM

CPU phases
12 (60 A)
Power design
12 + 2 + 1
EPS connector
2

Memory

Type / slots
DDR5 / 4 DIMMs
Max capacity / OC
256 GB / 8200 MT/s
Per DIMM
64 GB
XMP / EXPO
Not recorded

PCIe

Supported version
PCIe 4.0
x16 physical
2
x16 Gen 4
2
x1 physical
1
x1 Gen 3
1

Storage

M.2 slots
2
M.2 lengths
22110, 2280, 2260
M.2 modes
M2_1:PCIe5.0x4(9000/7000)/PCIe4.0x4(8000);M2_2:PCIe4.0x4(9000/8700/8600/8400/7000)/PCIe4.0x2(8500/8300)
SATA ports
4

Display outputs

HDMI
Yes · 2.1 · 4K 60Hz
DisplayPort
Yes · 1.4 · 4K 60Hz
USB-C DisplayPort
No

USB

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

Networking

Ethernet
Realtek ® 8125 2.5G LAN
LAN ports
1
LAN speed
2500 Mbps
Wi-Fi
Wi‑Fi 6E (802.11ax)
Wi-Fi bandwidth
160MHz, up to 2.4 Gbps
Bands
['2.4GHz', '5GHz', '6GHz']
Bluetooth
5.3

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

CPU support
Supports AMD Ryzen™ 9000/ 8000/ 7000 Series Desktop Processors, Socket AM5,
OS support
Support for Windows ® 11 64-bit,
Memory notes
Supports Ryzen 9000 Series with varying max OC speeds by configuration: 1DPC 1R up to 8200+ MT/s, 1DPC 2R up to 6400+ MT/s, 2DPC 1R up to 6400+ MT/s, 2DPC 2R up to 6000+ MT/s. Supports AMD POR Speed and JEDEC Speed, memory overclocking and AMD EXPO. Supports dual-channel, non‑ECC unbuffered DIMMs, and CUDIMM (clock driver bypass mode only). CUDIMM support and POR boot frequency may vary by CPU series; some CPUs may fail to boot without manual overclocking and future BIOS updates may improve compatibility. DIMM slots have single-sided latches. Memory compatibility and supported speeds depend on CPU and memory configuration; see the Memory Compatibility List on the product Support page (https://www.msi.com/support) for details.
Display notes
1x HDMI (HDMI 2.1) and 1x DisplayPort (DisplayPort 1.4). Maximum listed resolution for both outputs is 4K at 60Hz. These outputs are available only when using a processor with 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 4.0 supports up to x4 (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),
M2_1
PCIe 5.0 x4 (Ryzen 9000/7000); PCIe 4.0 x4 (Ryzen 8000) 4 · 22110, 2280 · From CPU — Speed depends on CPU: PCIe 5.0 x4 with 9000/7000; PCIe 4.0 x4 with 8000. No other slots or SATA ports are stated as disabled by populating this slot.
M2_2
PCIe 4.0 x4 (Ryzen 9000/8700/8600/8400/7000); PCIe 4.0 x2 (Ryzen 8500/8300) 4 · 2280, 2260 · From CPU — Speed depends on CPU: PCIe 4.0 x4 with 9000/8700/8600/8400/7000; PCIe 4.0 x2 with 8500/8300. No other slots or SATA ports are stated as disabled by populating this slot.
RAID
SATA / PCIe (SATA: RAID 0, RAID 1, RAID 10; M.2 NVMe: RAID 0, RAID 1)
Storage notes
2x M.2 slots (both from CPU). 4x SATA 6G. M.2 SSD heatsink restrictions apply per manual. RAID supported: SATA (0/1/10), M.2 NVMe (0/1).
USB notes
Counts derived only from Primary USB data. Primary lists: 4x USB 2.0 (front), 4x 5Gbps Type-A (rear), 2x 5Gbps Type-A (front), 3x 10Gbps Type-A (rear), 1x 10Gbps Type-C (rear), 1x 10Gbps Type-C (front). Internal IO and Back Panel IO also mention USB ports (internal: 4x USB2.0, 2x 5Gbps Type-A, 1x 10Gbps Type-C; back panel: various 10Gbps/5Gbps Type-A and 10Gbps Type-C), but these were not added to the primary counts per instructions. No Thunderbolt/USB4 indicated in the primary data; USB-C PD wattage not specified.
Audio notes
7.1-Channel High Definition Audio; 'Audio Connectors' mentioned but no specific rear jack count, gold plating, or optical S/PDIF Out indicated.
Networking notes
Wireless module pre-installed in M.2 (Key-E) slot; supports MU-MIMO TX/RX; supports 802.11 a/b/g/n/ac/ax; 6GHz band support may depend on country regulations; Wi-Fi 6E requires Windows 11; Bluetooth version may be updated per vendor; FIPS/FISMA noted.
Button notes
Also includes DisplayPort, HDMI, 2.5G LAN, Wi‑Fi/Bluetooth, and audio connectors; multiple high-speed USB ports (10Gbps Type‑A, 10Gbps Type‑C, 5Gbps Type‑A) plus 4x USB 2.0 ports; power connectors: 1x ATX_PWR, 2x CPU_PWR; fan headers: 1x CPU_Fan, 1x Combo Fan (Pump_Sys Fan), 4x System Fan; front headers: 2x Front Panel (JFP), Front Audio (JAUD), Chassis Intrusion (JCI), 1x Com Port (JCOM); tuning controller (JDASH); RGB headers: 3x Addressable V2 (JARGB_V2), 1x RGB (JRGB); TPM pin header (supports TPM 2.0).
Fan / RGB headers
1 CPU · — OPT · 1 AIO · 4 chassis · 3 ARGB · 1 RGB
Other headers
Front audio · System panel · TPM
Accessories
,
Dimensions
ATX, 243.84mmx304.8mm,

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

Amazon

Price history

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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.

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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.

CPU support

Supports AMD Ryzen™ 9000/ 8000/ 7000 Series Desktop Processors, Socket AM5,

Memory

4x DDR5 UDIMM, Maximum Memory Capacity 256GB, Memory Support DDR5 8200 - 5600 (OC) MT/s / 5600 - 4800 (JEDEC) MT/s, Ryzen™ 9000 Series Processors max. overclocking frequency:,
• 1DPC 1R Max speed up to 8200+ 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 6000+ MT/s, , Supports AMD POR Speed and JEDEC Speed,
Supports Memory Overclocking and AMD EXPO TM,
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., • The DIMM slots on this motherboard only have single-sided latches.,
• 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 TM 2.1, maximum resolution of 4K 60Hz*, 1x DisplayPort, Support DisplayPort 1.4, maximum resolution of 4K 60Hz*, *Available only on processors featuring integrated graphics. Graphics specifications may vary depending on the CPU installed.,

Expansion slots

2x PCI-E x16 slot, 1x PCI-E x1 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 4.0 supports up to x4 (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 5.0 x4 , supports 22110/2280 devices, M.2_2 Source (From CPU) supports up to PCIe 4.0 x4 , supports 2280/2260 devices, 4x SATA 6G, ,
M2_1 slot,
• Supports up to PCIe 5.0 x4 (For Ryzen™ 9000/ 7000 Series processors),
• Supports up to PCIe 4.0 x4 (For Ryzen™ 8000 Series processors), ,
M2_2 slot,
• Supports up to PCIe 4.0 x4 (For Ryzen™ 9000/ 8700/ 8600/ 8400/ 7000 Series processors),
• Supports up to PCIe 4.0 x2 (For Ryzen™ 8500/ 8300 Series processors), , *Please refer to the manual for M.2 SSD heatsink restrictions.,, Supports RAID 0, RAID 1, and RAID 10 for SATA storage devices,
Supports RAID 0 and RAID 1 for M.2 NVMe storage devices,

USB

4x USB 2.0 (Front), 4x USB 5Gbps Type A (Rear), 2x USB 5Gbps Type A (Front), 3x USB 10Gbps Type A (Rear), 1x USB 10Gbps Type C (Rear), 1x USB 10Gbps Type C (Front),

Internal I/O

1x Power Connector(ATX_PWR), 2x Power Connector(CPU_PWR), 1x CPU Fan, 1x Combo Fan (Pump_Sys Fan), 4x System Fan, 2x Front Panel (JFP), 1x Chassis Intrusion (JCI), 1x Front Audio (JAUD), 1x Com Port (JCOM), 1x Tuning Controller connector(JDASH), 3x 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 10Gbps Type C ports,

Rear I/O

Clear CMOS Button DisplayPort 2.5G LAN USB 10Gbps Type-A USB 5Gbps Type-A Wi-Fi / Bluetooth Audio Connectors Flash BIOS Button HDMI™ USB 10Gbps Type-A USB 10Gbps Type-C,

Wireless

Wi-Fi 6E, The Wireless module is pre-installed in the M.2 (Key-E) slot,
Supports MU-MIMO TX/RX, 2.4GHz/ 5GHz/ 6GHz* (160MHz) up to 2.4Gbps,
Supports 802.11 a/ b/ g/ n/ ac/ ax, , Supports Bluetooth ® 5.3**, FIPS, FISMA, , * 6GHz band support may depend on every country’s regulations and Wi-Fi 6E requires Windows 11.,
** The Bluetooth version may be updated, please refer to the Wi-Fi chipset vendor’s website for details.,

Audio

Realtek ® ALC897, 7.1-Channel High Definition Audio,

Accessories

,

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