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MSI PRO B850-S WIFI6E

MSIMainstream motherboard

PRO B850-S WIFI6E

Released August 2025.4Spec databasepreisvergleich.heise.de/3553395Read 14 October 2026Shows Gelistet seit 01.08.2025, the date the board was first listed in the German price comparison. MSI's Spain store created the product page on 2025-10-01. The manual is dated 2025/05 and the datasheet was generated on 2025-10-31. The job evidence gives a first Newegg listing in 2025-10. The month is approximate. Last checked 16 October 2026.

CPU socket
AM5
Chipset
AMD B850
Form factor
ATX
M.2 slots
2

62 of 78 fields known.

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At a glance

Ports

  • USB-C USB 3.2 Gen 2
  • 3 USB-A USB 3.2 Gen 2
  • 4 USB-A USB 3.2 Gen 1
  • HDMI 2.1
  • DisplayPort 1.4
  • Ethernet (RJ45)
  • 3 3.5 mm audio
  • USB-C header
  • USB 3 header (19-pin)
  • 2 USB 2.0 header (9-pin)

All specs

SourceCalculated

General

Series
PRO1Owner's manualgzhls.at/blob/ldb/f/5/6/a/b4110299f52b8027e52d17c13270271b831a.pdfRead 14 October 2026Cover: PRO Series Motherboard, PRO B850-S WIFI6E.
Model numbers
PRO B850-S WIFI6E, 7E80-002R, 911-7E80-0021Owner's manualgzhls.at/blob/ldb/f/5/6/a/b4110299f52b8027e52d17c13270271b831a.pdfRead 14 October 2026The manual names only PRO B850-S WIFI6E. The board's PCB print reads MS-7E80.3Maker product pagees-store.msi.com/products/pro-b850-s-wifi6eRead 14 October 2026MSI Spain store SKU 911-7E80-002, which is MSI's order code. The part number 7E80-002R comes from Heise's price comparison and European retailers.4Spec databasepreisvergleich.heise.de/3553395Read 14 October 2026Model number 7E80-002R.
GTIN / EAN
47113773653385Retailer pagesse.tet.co.uk/tetportal/msi-pro-b850-s-wifi6e-motherboard-amd-b850-socket-am5-atx-pro-b850-s-wifi6e.htmlRead 14 October 2026EAN 4711377365338. Datek and Blinq listings show the same EAN. No UPC was readable on a page that could be opened.
Announced
Not available
Status
Available4Spec databasepreisvergleich.heise.de/3553395Read 14 October 2026Listed with 29 offers from 139 to 235 EUR on 2026-10-14.
Predecessor
Not available
Successor
Not available
Launch price (US)
Not available
Launch price (EU)
Not available
Markets
Not available
Colours
Not available
Segment
Mainstream2Maker spec sheet (PDF)storage-asset.msi.com/datasheet/mb/in/PRO-B850-S-WIFI6E.pdfRead 14 October 2026The datasheet cover carries the tagline Business and Elegance, and the board sits in MSI's PRO series. MSI names no gaming or creator use. Heise's price comparison also lists the segment as mainstream.
Board revision
Not available

Platform

CPU socket
AM51Owner's manualgzhls.at/blob/ldb/f/5/6/a/b4110299f52b8027e52d17c13270271b831a.pdfRead 14 October 2026
Chipset
AMD B8501Owner's manualgzhls.at/blob/ldb/f/5/6/a/b4110299f52b8027e52d17c13270271b831a.pdfRead 14 October 2026
Supported processors
AMD Ryzen 9000 Series, AMD Ryzen 8000 Series, AMD Ryzen 7000 Series1Owner's manualgzhls.at/blob/ldb/f/5/6/a/b4110299f52b8027e52d17c13270271b831a.pdfRead 14 October 2026Specifications, CPU row: AMD Ryzen 9000/8000/7000 Series Desktop Processors, socket AM5. The manual points to msi.com for the newest support list. Read on 2026-10-14.
CPU overclocking
Yes1Owner's manualgzhls.at/blob/ldb/f/5/6/a/b4110299f52b8027e52d17c13270271b831a.pdfRead 14 October 2026Page 29: the motherboard is designed to support overclocking. The Special Features list names Core Boost and Memory Boost. The B850 chipset allows CPU overclocking.

Board

Front and side, drawn to scale.

Form factor
ATX1Owner's manualgzhls.at/blob/ldb/f/5/6/a/b4110299f52b8027e52d17c13270271b831a.pdfRead 14 October 2026Specifications, Form Factor row: ATX, 9.6 in. x 12 in. (244 mm x 305 mm).
Board dimensions
Width244Height305mm(9.6 × 12 in)1Owner's manualgzhls.at/blob/ldb/f/5/6/a/b4110299f52b8027e52d17c13270271b831a.pdfRead 14 October 2026Specifications: 244 mm x 305 mm. MSI's Spain store and the TET listing give 243.84 x 304.8 mm, the exact conversion of 9.6 x 12 in.3Maker product pagees-store.msi.com/products/pro-b850-s-wifi6eRead 14 October 2026ATX, 243.84 x 304.8 mm, the exact conversion of 9.6 x 12 in.
PCB layers
63Maker product pagees-store.msi.com/products/pro-b850-s-wifi6eRead 14 October 2026Product text: 6-layer PCB with 2 oz thickened copper and server-grade material. A search summary of MSI's global page mentioned an 8-layer label next to this text. No maker page or document confirmed 8 layers, and the manual says only Server Grade PCB and 2oz Copper thickened PCB.
Back-connect design
No1Owner's manualgzhls.at/blob/ldb/f/5/6/a/b4110299f52b8027e52d17c13270271b831a.pdfRead 14 October 2026The component overview on page 27 shows the usual front-side power, fan and front-panel connectors. MSI sells back-connect boards under separate model names.
RGB lighting on the board
No1Owner's manualgzhls.at/blob/ldb/f/5/6/a/b4110299f52b8027e52d17c13270271b831a.pdfRead 14 October 2026Specifications, LED Features: 4x EZ Debug LED and 1x EZ Memory Detection LED, plus the RGB and ARGB headers. The list names no lighting on the board itself.

Power delivery

Power stage layout
12+2+13Maker product pagees-store.msi.com/products/pro-b850-s-wifi6eRead 14 October 2026Product text: 12+2+1 Duet Rail power system with P-PAK. The 12 phases are for the CPU, 2 for SoC and 1 for MISC. Digital PWM controller.
CPU core (Vcore) power stages
123Maker product pagees-store.msi.com/products/pro-b850-s-wifi6eRead 14 October 2026The 12 Duet Rail phases are the CPU (Vcore) rail. Heise's price comparison lists 12 power stages for VCORE, doubled from 6 real phases.4Spec databasepreisvergleich.heise.de/3553395Read 14 October 2026VRM row: 12+2+1, 14 virtual CPU phases (2x6+2) and 8 real CPU phases (6+2). 12 MOSFET power stages for VCORE, 2 for SOC and 1 for other uses. Heise names the stage rating as 55 A, which is not stored because it is a reading of the chip markings.
Vcore power stage rating
Not available
VRM controller
Richtek RT3678BE4Spec databasepreisvergleich.heise.de/3553395Read 14 October 2026PWM controllers row: RT3678BE (max 10 phases) and RT3672EE (max 2 phases). Heise names no maker. The RT3678 family is Richtek's. The Vcore controller is stored. No review names a controller, and this is one aggregator.
CPU power connectors
8+8 pin1Owner's manualgzhls.at/blob/ldb/f/5/6/a/b4110299f52b8027e52d17c13270271b831a.pdfRead 14 October 2026Specifications, Power Connectors: 1x 24-pin ATX main power connector and 2x 8-pin +12V power connectors. Page 39 shows CPU_PWR1 and CPU_PWR2.
Extra slot power connector
No1Owner's manualgzhls.at/blob/ldb/f/5/6/a/b4110299f52b8027e52d17c13270271b831a.pdfRead 14 October 2026The Power Connectors row and the component overview list no extra slot power connector. The Scan listing mentions an 8-pin PCIe power connector, but the manual does not.

Memory

Memory type
DDR51Owner's manualgzhls.at/blob/ldb/f/5/6/a/b4110299f52b8027e52d17c13270271b831a.pdfRead 14 October 2026Specifications, Memory row: 4x DDR5 memory slots, supporting up to 256GB, dual channel. The slots have a single latch.
Memory slots
41Owner's manualgzhls.at/blob/ldb/f/5/6/a/b4110299f52b8027e52d17c13270271b831a.pdfRead 14 October 2026
Max memory
256GB1Owner's manualgzhls.at/blob/ldb/f/5/6/a/b4110299f52b8027e52d17c13270271b831a.pdfRead 14 October 2026
Max memory speed (overclocked)
8,200MT/s2Maker spec sheet (PDF)storage-asset.msi.com/datasheet/mb/in/PRO-B850-S-WIFI6E.pdfRead 14 October 2026Memory Support: 4 DIMMs, Dual Channel DDR5 - 8200+ MT/s (OC). MSI's Spain store adds 1DPC 1R and a JEDEC range of 5600 to 4800 MT/s. The maker names no CPU family for the figure.3Maker product pagees-store.msi.com/products/pro-b850-s-wifi6eRead 14 October 20268200+ MT/s OC (1DPC 1R), 5600-4800 MT/s JEDEC. Dual-channel, non-ECC, AMD EXPO supported. No CPU family is named.
ECC memory
No1Owner's manualgzhls.at/blob/ldb/f/5/6/a/b4110299f52b8027e52d17c13270271b831a.pdfRead 14 October 2026Specifications: Supports Non-ECC, Un-buffered memory.
CUDIMM support
No1Owner's manualgzhls.at/blob/ldb/f/5/6/a/b4110299f52b8027e52d17c13270271b831a.pdfRead 14 October 2026Specifications: Supports CUDIMM, Clock Driver bypass mode only.

Expansion slots

Expansion slots
Physical slotElectrical lanesPCIe generationConnected toCount
PCIe x16164CPU1
PCIe x1644Chipset1
PCIe x113Chipset1
Source1Owner's manualgzhls.at/blob/ldb/f/5/6/a/b4110299f52b8027e52d17c13270271b831a.pdfRead 14 October 2026Specifications and page 32: 2x PCIe x16 slots and 1x PCIe x1 slot. PCI_E1 is from the CPU, PCIe 4.0 x16 with Ryzen 9000 and 7000. It runs PCIe 4.0 x8 with Ryzen 8700, 8600 and 8400, and PCIe 4.0 x4 with Ryzen 8500 and 8300. PCI_E3 is a x16 slot from the B850 chipset, up to PCIe 4.0 x4. PCI_E2 is the x1 slot from the chipset, up to PCIe 3.0 x1. The board has no PCIe 5.0 graphics slot.
Full-length PCIe slots
2
Fastest PCIe x16 slot generation
4

Storage

M.2 storage slots
SlotPCIe generationPCIe lanesConnected toLongest driveTakes SATA drivesHeatsink
M2_154CPUM.2 22110NoYes
M2_244CPUM.2 2280NoNo
Source1Owner's manualgzhls.at/blob/ldb/f/5/6/a/b4110299f52b8027e52d17c13270271b831a.pdfRead 14 October 2026Specifications and pages 33 to 36, Ryzen 9000 values. M2_1 is from the CPU, up to PCIe 5.0 x4 (PCIe 4.0 x4 with Ryzen 8000), 2280 and 22110 drives, under the M.2 Shield Frozr heatsink. M2_2 is from the CPU, up to PCIe 4.0 x4 (PCIe 4.0 x2 with Ryzen 8500 and 8300), 2260 and 2280 drives. The M2_2 install steps show a clip and no heatsink. No slot lists an M.2 SATA mode, so sata is false. The Wi-Fi module sits in a separate M.2 Key-E slot.
M.2 slots
2
PCIe 5.0 M.2 slots
1
SATA ports
41Owner's manualgzhls.at/blob/ldb/f/5/6/a/b4110299f52b8027e52d17c13270271b831a.pdfRead 14 October 2026Specifications: 4x SATA 6Gb/s ports from the B850 chipset.

Rear ports

Rear ports
TypeVersionCountMax link rate (Gbps)
USB-CUSB 3.2 Gen 2110
USB-AUSB 3.2 Gen 2310
USB-AUSB 3.2 Gen 145
HDMIHDMI 2.11Not available
DisplayPortDisplayPort 1.41Not available
Ethernet (RJ45)Not available12.5
3.5 mm audioNot available3Not available
Source1Owner's manualgzhls.at/blob/ldb/f/5/6/a/b4110299f52b8027e52d17c13270271b831a.pdfRead 14 October 2026Specifications and page 23: 3x USB 10Gbps Type-A (CPU), 1x USB 10Gbps Type-C (B850 chipset), 4x USB 5Gbps Type-A (ASM1074), 1x DisplayPort, 1x HDMI, 1x 2.5G LAN (RJ45) and 3 audio jacks (line-in, line-out, mic-in). MSI's speed names are stored as USB-IF names: 5Gbps as USB 3.2 Gen 1 and 10Gbps as Gen 2. DisplayPort 1.4 and HDMI 2.1 work only with a CPU that has integrated graphics, 4K 60 Hz. The manual gives no USB power output or DisplayPort alt mode figures. The two Wi-Fi antenna connectors and the Clear CMOS and Flash BIOS buttons are not ports.
Rear USB ports
8
Rear USB-C ports
1
Fastest rear USB port
10Gbps
Thunderbolt
Not available

Internal connectors

Internal USB headers
HeaderMax data rate (Gbps)HeadersFront ports served
USB-C header1011
USB 3 header (19-pin)512
USB 2.0 header (9-pin)0.4824
Source1Owner's manualgzhls.at/blob/ldb/f/5/6/a/b4110299f52b8027e52d17c13270271b831a.pdfRead 14 October 2026Specifications and pages 41 and 42: JUSBC1 is 1x USB 10Gbps Type-C front panel port. JUSB3 is one 5Gbps connector for 2 ports. JUSB1 and JUSB2 are two USB 2.0 connectors for 4 ports. The JUSBC1 description on page 41 says up to 5Gbps, but the specification and the section title say 10Gbps, and the MSI datasheet counts 2 USB 10Gbps Type-C ports in total. 10 is stored.
Front USB-C header speed
10Gbps
Fan headers
61Owner's manualgzhls.at/blob/ldb/f/5/6/a/b4110299f52b8027e52d17c13270271b831a.pdfRead 14 October 2026Specifications: 1x 4-pin CPU fan, 1x 4-pin water-pump/system fan and 4x 4-pin system fan connectors.
ARGB headers
31Owner's manualgzhls.at/blob/ldb/f/5/6/a/b4110299f52b8027e52d17c13270271b831a.pdfRead 14 October 2026Specifications: 3x 3-pin A-RAINBOW V2 (ARGB Gen2) LED connectors.
RGB headers
11Owner's manualgzhls.at/blob/ldb/f/5/6/a/b4110299f52b8027e52d17c13270271b831a.pdfRead 14 October 2026Specifications: 1x 4-pin RGB LED connector (JRGB1).

Networking

Ethernet controllers
Realtek RTL81251Owner's manualgzhls.at/blob/ldb/f/5/6/a/b4110299f52b8027e52d17c13270271b831a.pdfRead 14 October 2026Specifications: 1x Realtek 8125D 2.5Gbps LAN controller. The suffix D is left out.
Ethernet ports
1
Ethernet speed
2.5Gbps
Wi-Fi included
Yes1Owner's manualgzhls.at/blob/ldb/f/5/6/a/b4110299f52b8027e52d17c13270271b831a.pdfRead 14 October 2026Specifications: the wireless module is pre-installed in the M.2 (Key-E) slot.
Wi-Fi standard
Wi-Fi 6E1Owner's manualgzhls.at/blob/ldb/f/5/6/a/b4110299f52b8027e52d17c13270271b831a.pdfRead 14 October 2026Specifications: Wi-Fi 6E, 802.11 a/b/g/n/ac/ax.
Wi-Fi bands
2.4 GHz, 5 GHz, 6 GHz1Owner's manualgzhls.at/blob/ldb/f/5/6/a/b4110299f52b8027e52d17c13270271b831a.pdfRead 14 October 2026Specifications: 2.4GHz/5GHz/6GHz. 6 GHz band support may depend on each country's regulations, and Wi-Fi 6E requires Windows 11.
Max Wi-Fi channel width
160MHz1Owner's manualgzhls.at/blob/ldb/f/5/6/a/b4110299f52b8027e52d17c13270271b831a.pdfRead 14 October 2026Specifications: MU-MIMO TX/RX, 2.4GHz/5GHz/6GHz (160MHz) up to 2.4Gbps.
Wi-Fi module
Not available
Bluetooth
5.31Owner's manualgzhls.at/blob/ldb/f/5/6/a/b4110299f52b8027e52d17c13270271b831a.pdfRead 14 October 2026Specifications: Bluetooth 5.3, FIPS, FISMA. The version may be updated by the Wi-Fi chipset vendor.

Audio

Audio codec
Realtek ALC8971Owner's manualgzhls.at/blob/ldb/f/5/6/a/b4110299f52b8027e52d17c13270271b831a.pdfRead 14 October 2026Specifications, Audio row: Realtek ALC897 Codec, 7.1-channel High Definition Audio.
DAC chip
Not available

Features

BIOS flashback
Yes1Owner's manualgzhls.at/blob/ldb/f/5/6/a/b4110299f52b8027e52d17c13270271b831a.pdfRead 14 October 2026Specifications and page 23: Flash BIOS button on the rear panel, with a Flash BIOS port (USB 10Gbps Type-A).
Clear CMOS button (rear)
Yes1Owner's manualgzhls.at/blob/ldb/f/5/6/a/b4110299f52b8027e52d17c13270271b831a.pdfRead 14 October 2026Specifications and page 23: Clear CMOS button on the rear panel. JBAT1 is a second jumper.
POST code display
No1Owner's manualgzhls.at/blob/ldb/f/5/6/a/b4110299f52b8027e52d17c13270271b831a.pdfRead 14 October 2026Specifications, LED Features and page 48: 4x EZ Debug LED and 1x EZ Memory Detection LED. They are single status LEDs and the manual lists no two-digit display.
Power button on the board
No1Owner's manualgzhls.at/blob/ldb/f/5/6/a/b4110299f52b8027e52d17c13270271b831a.pdfRead 14 October 2026The specifications chapter, the component overview and the onboard LEDs page list no power or reset button on the board. Its only buttons are the two on the rear panel.
Dual BIOS
No1Owner's manualgzhls.at/blob/ldb/f/5/6/a/b4110299f52b8027e52d17c13270271b831a.pdfRead 14 October 2026Specifications, BIOS Features: 1x 256 Mb flash. Dual BIOS is not stated.
Pre-installed I/O shield
Yes1Owner's manualgzhls.at/blob/ldb/f/5/6/a/b4110299f52b8027e52d17c13270271b831a.pdfRead 14 October 2026Special Features, EZ DIY: Pre-installed I/O Shield.
Tool-free features
Tool-free M.2 latch, PCIe slot release1Owner's manualgzhls.at/blob/ldb/f/5/6/a/b4110299f52b8027e52d17c13270271b831a.pdfRead 14 October 2026Special Features, EZ DIY: EZ M.2 Clip II (locks the SSD without a screw, pages 34 to 36) and EZ PCIe Clip II (release for the graphics card, datasheet). The M.2 Shield Frozr heatsink is removed with screws (page 34), so m2_heatsink is not stored. The Wi-Fi antenna cables are connected tight to the antenna connectors (page 26), so antenna_connector is not stored.2Maker spec sheet (PDF)storage-asset.msi.com/datasheet/mb/in/PRO-B850-S-WIFI6E.pdfRead 14 October 2026Features page: EZ PCIe Clip II allows easy removal of the graphics card by pressing the tail-like lock with one finger.

Measured

We could not find any of these 3 fields. Show them
VRM temperature under CPU load
Not available
Power draw idle
Not available
Power draw CPU stress
Not available

In the box

In the box
1x Motherboard, 1x Quick installation guide, 1x European Union Regulatory Notices, 1x SATA cable, 1x EZ Wi-Fi Antenna, 1x EZ M.2 Clip II Remover, 2x EZ M.2 Clip II1Owner's manualgzhls.at/blob/ldb/f/5/6/a/b4110299f52b8027e52d17c13270271b831a.pdfRead 14 October 2026Package Contents, page 22.

Warranty

Manufacturer warranty (source market)
3years3Maker product pagees-store.msi.com/products/pro-b850-s-wifi6eRead 14 October 2026MSI Spain store: 3-year warranty. Heise's price comparison says 3 years too. The market is Spain and Germany.4Spec databasepreisvergleich.heise.de/3553395Read 14 October 2026Warranty: 3 Jahre.

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  1. Read 14 October 2026Backs 41 fields
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