MSI PRO B850-P WIFI ATX Motherboard

Below is a Chipset

AMD B850

CPU Support

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

Memory

- Slots: 4x DDR5 UDIMM
- Maximum Capacity: 256GB
- Supported Speeds:
  • DDR5 8200–5600 (OC) MT/s
  • DDR5 5600–4800 (JEDEC) MT/s
- Overclocking (Ryzen™ 9000 Series):
  • 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 4800+ MT/s
- Supports AMD POR Speed, JEDEC Speed, Memory Overclocking and AMD EXPOTM
- Supports Dual-Channel mode, Non-ECC, Un-buffered memory, and CUDIMM (Clock Driver bypass mode only*)
- Note: DIMM slots have double-sided latches; compatibility may vary (*Certain CPUs may require manual overclocking after boot; future BIOS updates may improve compatibility).

Onboard Graphics

1x HDMI™ port supporting HDMI™ 2.1 (up to 4K 60Hz*)
Available only with processors featuring integrated graphics; specifications may vary with the CPU installed.

Expansion Slots

4x PCI-E x16 Slots:
- PCI_E1:
  • From CPU: PCIe 5.0 up to x16
  • (Variable support based on CPU series):
    - Ryzen™ 9000/7000 Series: PCIe 5.0 x16
    - Ryzen™ 8700/8600/8400 Series: PCIe 4.0 x8
    - Ryzen™ 8500/8300 Series: PCIe 4.0 x4
- PCI_E2: From Chipset: PCIe 3.0 up to x1
- PCI_E3: From Chipset: PCIe 4.0 up to x4
- PCI_E4: From Chipset: PCIe 3.0 up to x1
Note: PCI_E2, PCI_E3, and PCI_E4 share bandwidth; PCI_E3 will run at x2 speed when devices are installed in PCI_E2 or PCI_E4 slots.

Audio

Realtek® ALC897 Codec
7.1-Channel High Definition Audio

Storage

M.2 Slots: 3x and 4x SATA 6G ports

• M.2_1 (CPU):
  – Supports up to PCIe 5.0 x4
  – Device sizes: 2280/2260
  – For Ryzen™ 9000/7000: PCIe 5.0 x4; For Ryzen™ 8000: PCIe 4.0 x4

• M.2_2 (CPU):
  – Supports up to PCIe 4.0 x4
  – Device sizes: 22110/2280
  – For Ryzen™ 9000/7000: PCIe 4.0 x4; for Ryzen™ 8700/8600/8400: PCIe 3.0 x4; for Ryzen™ 8500/8300: PCIe 3.0 x2

• M.2_3 (Chipset):
  – Supports up to PCIe 4.0 x2
  – Device sizes: 2280/2260

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

RAID

Supports RAID 0 and RAID 1 for M.2 NVMe storage devices

USB Ports

Rear:
- 4x USB 2.0
- 1x USB 5Gbps Type A
- 2x USB 10Gbps Type C

Front:
- 4x USB 2.0
- 4x USB 5Gbps Type A
- 1x USB 5Gbps Type C
- (Additional Rear) 1x USB 10Gbps Type A

LAN

Realtek® 8126VB 5G LAN

Internal I/O Connectors

- 1x Power Connector (ATX_PWR)
- 2x Power Connectors (CPU_PWR)
- 1x Power Connector (PCIE_PWR 8pin)
- 1x CPU Fan header
- 1x Combo Fan (Pump_Sys Fan) header
- 4x System Fan headers
- 2x Front Panel headers (JFP)
- 1x Chassis Intrusion header (JCI)
- 1x Front Audio header (JAUD)
- 1x Com Port header (JCOM)
- 1x Tuning Controller connector (JDASH)
- 3x Addressable V2 RGB LED connectors (JARGB_V2)
- 1x RGB LED connector (JRGB)
- 1x TPM header (supports TPM 2.0)
- Additional internal USB headers: 4x USB 2.0, 4x USB 5Gbps Type A, and 1x USB 5Gbps Type C

Wireless LAN & Bluetooth

Wireless: Wi‑Fi 7 (module 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
Bluetooth: Bluetooth® 5.4 with MLO and 4KQAM
6GHz support and Bluetooth 5.4 availability may depend on local regulations and will be ready in Windows 11 version 24H2.

LED Feature

4x EZ Debug LEDs

Back Panel Ports

- Clear CMOS Button
- Flash BIOS Button
- HDMI™
- USB 10Gbps Type-A
- USB 10Gbps Type-C
- USB 10Gbps Type-C (second port)
- USB 5Gbps Type-A
- USB 2.0
- 5G LAN
- Wi‑Fi/Bluetooth
- Audio Connectors
- S/PDIF OUT

Operating System

Supports Windows® 11 (64-bit)

PCB/Form Factor

ATX; Dimensions: 243.84mm x 304.8mm