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MSI PRO B850-S WIFI6E AM5 AMD B850 SATA 6Gb/s 5G Network Wi-Fi6E DDR5 Motherboard

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Supports AMD Ryzen 9000 / 8000 / 7000 Series Desktop Processors
Supports DDR5 Memory, Dual Channel DDR5 8200+ MT/s (OC)
Ultra Performance: 12+2+1 Duet Rail Power System with P-PAK, dual 8-pin CPU power connectors, Core Boost, Memory Boost, 6-layer PCB made by 2oz thickened copper and server-grade level material
Frozr Guard: MOSFET thermal pads rated for 7W/mK, and M.2 Shield Frozr are built for high performance system and non-stop experience
EZ DIY: EZ M.2 Clip II, EZ PCIe Clip II and EZ Antenna
Lightning Fast Game experience: PCIe 4.0 slot and Lightning Gen 5 x4 M.2
2.5G LAN with Wi-Fi 6E Solution: the latest solution for professional and multimedia use, delivering secure, stable, and high-speed networking and data transmission
Audio Boost: Reward your ears with studio grade sound quality for the most immersive gaming experience

The Open Box Product Disclaimer applies to this product. Please note that this product is non-returnable and non-refundable.

Specs

Learn more about the MSI PRO B850-S WIFI6E

Model
Brand	MSI
Model	PRO B850-S WIFI6E

Supported CPU
CPU Socket Type	AM5
CPU Type	Ryzen 7000 Series / Ryzen 8000 Series / Ryzen 9000 Series

Chipsets
Chipset	AMD B850

Memory
Number of Memory Slots	4x288pin (DDR5)
Memory Standard	Support DDR5 8200 - 5600 (OC) MT/s / 5600 - 4800 (JEDEC) MT/s
Maximum Memory Supported	256GB
Channel Supported	Dual Channel
ECC Supported	Non-ECC
Buffer Supported	Un-buffered
Memory Feature	Supports CUDIMM, Clock Driver bypass mode only

Expansion Slots
PCI Express 4.0 x16	PCI_E1 Gen PCIe 4.0 supports up to x16 (From CPU) 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)
PCI Express x4	PCI_E3 Gen PCIe 4.0 supports up to x4 (From Chipset)
PCI Express x1	PCI_E2 Gen PCIe 3.0 supports up to x1 (From Chipset)

Storage Devices
Serial ATA (SATA)	4 x SATA 6Gb/s
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 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)
SATA RAID	Supports RAID 0, RAID 1, and RAID 10 for SATA storage devices Supports RAID 0 and RAID 1 for M.2 NVMe storage devices

Onboard Audio
Audio Chipset	Realtek ALC897
Audio Channels	7.1 Channels

Rear Panel Ports
Back I/O Ports	Clear CMOS Button 1 x DisplayPort 1 x 2.5G LAN 1 x USB 10Gbps Type-A 4 x USB 5Gbps Type-A 2 x Wi-Fi / Bluetooth 3 x Audio Connectors Flash BIOS Button 1 x HDMI 2 x USB 10Gbps Type-A 1 x USB 10Gbps Type-C

Internal I/O Connectors
Onboard USB	4 x USB 2.0 ports 2 x USB 5Gbps Type A ports 1 x USB 10Gbps Type C ports
Other Connectors	1 x CPU Fan 1 x Combo Fan (Pump_Sys Fan) 4 x System Fan 2 x Front Panel (JFP) 1 x Chassis Intrusion (JCI) 1 x Front Audio (JAUD) 1 x Com Port (JCOM) 1 x Tuning Controller connector(JDASH) 3 x Addressable V2 RGB LED connector (JARGB_V2) 1 x RGB LED connector(JRGB) 1 x TPM pin header(Support TPM 2.0)

Physical Spec
Form Factor	ATX
LED Lighting	4 x EZ Debug LED 1 x EZ Memory Detection LED
Dimensions (W x L)	12.0" x 9.6"
Power Pin	1 x Power Connector(ATX_PWR) 2 x Power Connector(CPU_PWR)

Software Feature
Windows 11	Supported

Additional Information
First Listed on Newegg	March 24, 2026