MSI B850 GAMING PLUS WIFIAM5 · ATX · DDR5 · board-only configuration · MSI global specification- Form factor
- ATX; 304.8 × 243.84 mmThis one: ATX; 243.84 × 304.8 mm
MOTHERBOARDS
MSI PRO B850-P WIFI
AM5 · DDR5 · ATX · Wi-Fi 7
- CPU socket
- AM5
- Chipset
- AMD B850
- Form factor
- ATX; 243.84 × 304.8 mm
An ATX AM5 board on AMD B850 with four DDR5 slots (up to 256 GB), a CPU-connected PCIe 5.0 x16 graphics slot, three M.2 slots with one at PCIe 5.0 x4, Realtek 5 Gb Ethernet and Wi-Fi 7.
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THE ACTUAL PRODUCT
Compare with MSI B850 GAMING PLUS WIFI
Specifications checked 26 Sept 2026Manufacturer specifications, not a hands-on test.
The nearest checked motherboards by key specifications, with what differs from the MSI PRO B850-P WIFI. The first matches the Compare button above.
MSI B850 GAMING PLUS WIFIAM5 · ATX · DDR5 · board-only configuration · MSI global specification
MSI MAG B850M MORTAR WIFIAM5 · DDR5 · Micro-ATX · MSI global specification- Form factor
- Micro-ATX; 243.84 × 243.84 mmThis one: ATX; 243.84 × 304.8 mm
ASUS TUF GAMING B850M-PLUS WIFITUF GAMING B850M-PLUS WIFI · AM5 · Micro-ATX · ASUS UK specification- Form factor
- Micro-ATX: 244 × 244 mmThis one: ATX; 243.84 × 304.8 mm
Key strengths
One PCIe 5.0 x4 M.2 slot and a PCIe 5.0 x16 graphics slot from the CPU, with Ryzen 9000/7000 processors.
5 Gb Ethernet plus Wi-Fi 7 and Bluetooth 5.4, with two rear 10 Gb/s USB-C ports.
Four x16-length slots, rear Flash BIOS and Clear CMOS buttons and EZ Debug plus memory-detection LEDs.
Before you buy
The three chipset slots are only PCIe 3.0 x1, 4.0 x4 and 3.0 x1 electrically, and PCI_E3 drops to x2 when PCI_E2 or PCI_E4 is populated.
Realtek ALC897 audio and a single HDMI 2.1 output (4K 60 Hz) for integrated graphics; no rear 20 Gb/s USB-C.
Ryzen 8000 processors reduce the graphics slot to PCIe 4.0 x8 or x4 and the second M.2 slot to PCIe 3.0.
Works with
Products in this catalogue that list the same socket or memory type as the MSI PRO B850-P WIFI. A shared socket or memory type is necessary but not sufficient: check the exact CPU and memory support lists, and the BIOS version, before buying.
- 19 AM5 processorsSocket AM5 on both, from cited specifications
- 50 DDR5 memory kitsMemory type DDR5 on both, from cited specifications
Every specification. With its source.
Full specifications
Exact configuration: AM5 · DDR5 · ATX · Wi-Fi 7 · MSI global specification
28 specifications in 9 groups. Values are manufacturer specifications unless a row says “Measured result” or “Calculated from cited specifications”. 1 row repeats a listed fact in the manufacturer’s own wording, kept under “Manufacturer wording”.
Platform & board
4 items
Memory
5 items
- DIMM slots
- 4
Physical positions for DDR5 modules, not a capacity or speed guarantee.
Source - Maximum listed memory
- 256 GB
Manufacturer capacity ceiling; CPU, BIOS and module validation apply.
Source - Memory type, slots and limit
- 4 DDR5 DIMM slots; dual channel; up to 256 GB; up to DDR5-8200+ (OC); JEDEC 4800–5600 MT/s; AMD EXPO; non-ECC unbuffered; CUDIMM (clock-driver bypass mode only)
CPU, BIOS and validated DIMM population determine supported capacity and speeds.
Source - Memory population OC limits
- Ryzen 9000: 1DPC 1R 8200+; 1DPC 2R 6400+; 2DPC 1R 6400+; 2DPC 2R 6000+ MT/s
Manufacturer OC ceilings, not guaranteed stable speed or measured performance; CPU, BIOS and memory population matter.
Source - CUDIMM operating mode
- Clock-driver bypass mode only
CPU- and BIOS-dependent; check MSI's memory compatibility list.
Source
Expansion slots
4 items
- Expansion slots and electrical links
- 4 × x16-length: PCI_E1 PCIe 5.0 x16 (CPU); PCI_E2 PCIe 3.0 x1 (chipset); PCI_E3 PCIe 4.0 x4 (chipset); PCI_E4 PCIe 3.0 x1 (chipset)
Electrical link widths from MSI's specification, not a guarantee of installed-system performance.
Source - Primary PCIe link
- PCI_E1: CPU PCIe 5.0 up to x16Source
- Slot and lane sharing
- PCI_E2, PCI_E3 & PCI_E4 share the bandwidth, PCI_E3 slot will run at x2 speed when installing devices in the PCI_E2 or PCI_E4 slot.Source
- Processor-dependent link widths
- PCI_E1: PCIe 5.0 x16 (Ryzen 9000/7000), PCIe 4.0 x8 (Ryzen 8700/8600/8400), PCIe 4.0 x4 (Ryzen 8500/8300); M.2_1: PCIe 5.0 x4 (Ryzen 9000/7000), PCIe 4.0 x4 (Ryzen 8000); M.2_2: PCIe 4.0 x4 (Ryzen 9000/7000), PCIe 3.0 x4 (Ryzen 8700/8600/8400), PCIe 3.0 x2 (Ryzen 8500/8300)
Link widths MSI lists per processor family for the named slot.
Source
Storage
4 items
- M.2 storage slots
- 3Source
- SATA ports
- 4Source
- Storage interfaces
- 1 × M.2 PCIe 5.0 x4; 1 × M.2 PCIe 4.0 x4; 1 × M.2 PCIe 4.0 x2; 4 × SATA 6 Gb/s
M.2_1, M.2_2 connect to the CPU; M.2_3 connects to the chipset. · Check the manual for M.2 SSD heatsink restrictions.
Source - SATA RAID modes
- RAID 0/1Source
Manufacturer wording (1)
The same facts in the manufacturer’s combined or original wording, each with its source.
- NVMe RAID modes
- RAID 0/1Source
USB & rear connections
3 items
- Processor-dependent display outputs
- 1 × HDMI; HDMI 2.1, maximum resolution of 4K 60Hz
Requires a processor with integrated graphics; supported modes depend on the CPU.
Source - Rear USB ports
- 4 × USB 2.0; 1 × USB 5Gbps Type-A; 1 × USB 10Gbps Type-A; 2 × USB 10Gbps Type-CSource
- Front USB header capacity
- 4 × USB 2.0; 4 × USB 5Gbps Type-A; 1 × USB 5Gbps Type-C
Requires compatible case ports and wiring; not rear-panel sockets.
Source
Networking
1 item
- Network interfaces
- Realtek 8126VB 5G LAN; Wi-Fi 7 (320 MHz channels, up to 5.8 Gb/s); Bluetooth 5.4
MSI says Wi-Fi 7 and its Bluetooth version need Windows 11 24H2 and that the Bluetooth version depends on the Wi-Fi chipset vendor; 6 GHz use depends on national rules. Link capabilities are not measured throughput.
Source
Audio
1 item
- Onboard audio
- Realtek ALC897; 7.1-Channel High Definition Audio; 2 rear audio jacks; 1 rear optical S/PDIF out
Manufacturer hardware description, not a measured audio-quality result.
Power, cooling & lighting
2 items
- Lighting headers
- 3 addressable V2 (ARGB Gen2) RGB headers; 1 RGB header
Addressable and analogue RGB connectors are different; check voltage before connecting lighting. The manual rates the 12 V JRGB connector at 3 A for up to 2 m of 5050 RGB strip, and each 5 V JARGB_V2 connector at 3 A for up to 180 individually addressable LEDs.
Source - Fan and pump headers
- 1 CPU; 1 pump/system combo; 4 system fan
Header counts do not specify electrical current limits.
Source
BIOS, software & diagnostics
4 items
- CPU support / BIOS source
- AMD Ryzen 9000 / 8000 / 7000 Series Desktop Processors
Check MSI's CPU support list and the BIOS version it requires. Family support does not confirm the firmware installed on a retail board.
Source - Diagnostic indicators
- 4 × EZ Debug LED; 1 × EZ Memory Detection LEDSource
- Rear Flash BIOS button
- YesSource
- Rear Clear CMOS button
- YesSource
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