MSI PRO B850M-A WIFI PZ AMD AM5 Micro-ATX Motherboard - DDR5, Wi-Fi 7, 5G LAN, PCIe 5.0 M.2, Back-Connect Design

CPU Support

• AMD Ryzen™ 9000 Series
• AMD Ryzen™ 8000 Series
• AMD Ryzen™ 7000 Series

Memory

• Slots: 4 × DDR5 UDIMM
• Max Capacity: 256 GB (64 GB per slot)
• Architecture: Dual-channel
• Supported Types: Non-ECC, unbuffered DDR5
• JEDEC Speeds: 4800 – 5600 MT/s
• Overclocked (OC) Speeds (with Ryzen 9000):
  • 1DPC 1R: Up to 8200+ MT/s
  • 1DPC 2R / 2DPC 1R: Up to 6400+ MT/s
  • 2DPC 2R: Up to 6000+ MT/s
• Features:
  • AMD EXPO™ support
  • CUDIMM support (Clock Driver bypass mode only)
  • Single-sided DIMM latches

Onboard Graphics (via CPU)

• HDMI™: 1 × HDMI 2.1 (up to 4K @ 60Hz)
• DisplayPort: 1 × DP 1.4 (up to 4K @ 60Hz)

Expansion Slots

• PCI_E1 (from CPU):
  • PCIe 5.0 x16 (Ryzen 9000/7000)
  • PCIe 4.0 x8 (Ryzen 8700/8600/8400)
  • PCIe 4.0 x4 (Ryzen 8500/8300)
• PCI_E2 (from chipset): PCIe 3.0 x1
• PCI_E3 (from chipset): PCIe 3.0 x1
• PCI_E4 (from chipset): PCIe 4.0 x4

Storage

• M.2 Slots:
  • M.2_1 (CPU): PCIe 5.0 x4 (2280/2260)
    • PCIe 4.0 x4 on Ryzen 8000
  • M.2_2 (CPU): PCIe 4.0 x4 (2280/2260)
    • PCIe 4.0 x2 on Ryzen 8500/8300
• SATA Ports: 4 × SATA 6Gb/s
• RAID Support:
  • SATA: RAID 0, 1, 10
  • NVMe (M.2): RAID 0, 1

Audio

• Codec: Realtek® ALC897
• Channels: 7.1-channel High Definition Audio

Networking

• Wired LAN: Realtek® 8126 5 Gigabit Ethernet
• Wireless:
  • Wi-Fi 7 (802.11be, tri-band: 2.4/5/6 GHz, up to 2.9 Gbps, 160 MHz channels)
  • Bluetooth: 5.4
  • Module pre-installed in M.2 (Key-E) slot

USB Ports

• USB 10Gbps (USB 3.2 Gen 2): 3 × Type-A + 2 × Type-C
• USB 5Gbps (USB 3.2 Gen 1): 3 × Type-A

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

• 4 × USB 2.0
• 2 × USB 5Gbps Type-A
• 1 × USB 10Gbps Type-C

Internal Connectors

• Power:
  • 1 × 24-pin ATX
  • 2 × 8-pin CPU
  • 1 × 8-pin PCIe
• Cooling:
  • 1 × CPU fan
  • 1 × Pump/Sys combo fan
  • 3 × System fans
• Lighting:
  • 3 × Addressable RGB V2 (5V 3-pin)
  • 1 × Standard RGB (12V 4-pin)
• Other:
  • TPM 2.0 header
  • 2 × Front panel (JFP)
  • Front audio (JAUD)
  • Chassis intrusion (JCI)
  • COM port (JCOM)
  • Tuning Controller (JDASH)

Back Panel I/O

• HDMI™
• DisplayPort
• USB 10Gbps Type-A ×3
• USB 10Gbps Type-C ×2
• USB 5Gbps Type-A ×3
• 5G LAN (RJ45)
• Wi-Fi / Bluetooth antennas
• 3.5mm audio jacks
• Flash BIOS Button
• Clear CMOS Button

Diagnostics & Features

• EZ Debug LEDs: 4 (CPU, DRAM, VGA, BOOT)
• EZ Memory Detection LED: Yes

Form Factor & OS Support

• Form Factor: Back-Connect micro-ATX (243.84 × 243.84 mm)
• Operating System: Windows® 11 64-bit