The MSI PRO B850M-A WIFI PZ is a Micro-ATX motherboard built on the AMD B850 chipset, designed for use with AMD Ryzen 7000, 8000, and 9000 Series processors via the Socket AM5 platform. Finished in black and measuring 244 x 243.8 mm, this board offers a compact yet feature-rich foundation for a wide range of desktop builds. It supports DDR5 memory across four DIMM slots in dual-channel configuration, with a maximum capacity of 256 GB and clock speeds reaching up to 8200 MHz in overclocked mode.
Storage and Expansion
The MSI PRO B850M-A WIFI PZ is equipped with two M.2 slots, with the primary slot supporting PCIe 5.0 and the secondary slot running on PCIe 4.0, both accommodating drives up to 2280 in size. Additional storage connectivity is provided through four SATA III ports. For expansion, the board features a PCIe 5.0 x16 slot alongside a PCIe 4.0 x16 slot and a PCIe 3.0 x16 slot, offering flexibility for graphics cards and other add-in components.
Connectivity and Networking
On the networking side, the board includes a Realtek RTL8126 5G wired LAN controller and integrated Wi-Fi 7 support, along with backward compatibility down to Wi-Fi 1. Bluetooth 5.4 is also included. The extensive USB offerings cover USB 3.2 Gen 2 Type-A and Type-C ports, USB 3.2 Gen 1 Type-A ports, and USB 2.0 ports. Display output is handled via one HDMI 2.1 port and one DisplayPort 1.4 output, while onboard audio is managed by a Realtek ALC897 chip supporting 7.1-channel output.
Product number manufacturer:
PRO B850M-A WIFI PZ
Audio
BIOS
Connectivity
USB 3.2 (Gen 1) type A ports:
5
USB 3.2 (Gen 2) type A ports:
3
USB 3.2 (Gen 2) type C ports:
3
Expansion slots
PCI Express 3.0 x16 slots:
1
Internal I/O
1st M.2 maximum slot size:
2280
1st M.2 slot PCI Express generation:
5.0
2nd M.2 maximum slot size:
2280
2nd M.2 slot PCI Express generation:
4.0
ATX Power connector (24-pin):
Chassis intrusion connector:
Front panel audio connector:
USB 3.1 (3.1 Gen 2) connectors:
1
USB 3.1 (Gen 1) header(s):
2
Memory
Supported memory clock speeds:
4800 MHz
Supported memory clock speeds (OC):
8200 MHz
Networking
Network technology (wired):
Wi-Fi 1 (802.11b), Wi-Fi 2 (802.11a), Wi-Fi 3 (802.11g), Wi-Fi 4 (802.11n), Wi-Fi 5 (802.11ac), Wi-Fi 6 (802.11ax), Wi-Fi 6E (802.11ax), Wi-Fi 7 (802.11be)
Physical characteristics
Processor
Compatible processor series:
AMD Ryzen 7000 Series, AMD Ryzen 8000 Series, AMD Ryzen 9000 Series
Sockets
Technical details
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