MSI MAG B850 GAMING PLUS MAX WIFI DDR5 AM5 ATX Motherboard
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MSI MAG B850 GAMING PLUS MAX WIFI — PCIe 5.0, 5G LAN & Wi-Fi 7 on AMD AM5
A next-generation AMD B850 ATX motherboard engineered for Ryzen 9000, 8000, and 7000 Series desktop processors. Features an ultra-robust 12+2+1 Duet Rail Power System, PCIe 5.0 x16 graphics slot with EZ PCIe Clip II, PCIe 5.0 M.2 with EZ Shield Frozr II, next-gen Wi-Fi 7, and Realtek 5G LAN wired networking.
Board Map
Every connector, located before you unbox
AMD Socket AM5 (LGA 1718) — Centre
Supports AMD Ryzen 9000, 8000, and 7000 Series processors with long-term platform support and precision boost overclocking.
12+2+1 Duet Rail VRM Heatsinks — Top & Left
Extended aluminum heatsinks with 7W/mK MOSFET thermal pads keep voltage regulators cool under sustained multi-core compute.
4 × DDR5 DIMM Slots with Memory Boost — Right
Dual-channel DDR5 supporting up to 256 GB memory capacity and extreme memory speeds reaching 8200+ MT/s (O.C.) with AMD EXPO.
PCIe 5.0 x16 Primary Slot with EZ PCIe Clip II — Centre
Reinforced PCIe 5.0 graphics slot featuring MSI's EZ PCIe Clip II for one-finger graphics card release.
3 × M.2 NVMe Sockets (Gen5 + Gen4) — Across PCB
Primary slot delivers ultra-fast PCIe 5.0 x4 bandwidth. Equipped with EZ M.2 Shield Frozr II for tool-less drive installation.
4 × SATA 6Gb/s Ports — Lower Right
Angled storage connections supporting RAID 0, 1, and 10 arrays.
Power Delivery & Thermals
What feeds the socket, and what keeps it steady
12+2+1 Duet Rail Power System
Dual 8-pin CPU power connectors combined with digital PWM deliver stable current to power-hungry Ryzen 9 16-core flagship processors.
Extended Heatsink Design
Massive aluminum heatsinks with premium 7W/mK MOSFET thermal pads keep power delivery cool during long gaming sessions.
EZ DIY Installation Mechanics
Features tool-less EZ M.2 Clip II and quick-release EZ PCIe Clip II to make building and upgrading effortless.
Lightning Gen5 M.2 & PCIe 5.0
Next-generation PCIe 5.0 standard ready for the fastest Gen5 SSDs and future flagship GPUs.
Lane Map
Interface speed rating & capability relative to modern motherboard standardsRear I/O Bay
Exactly what appears on the back of your case
Will It Fit Your Build?
Check these before you add to cartProcessor
Supports AMD Ryzen 9000, 8000, and 7000 Series desktop processors on socket AM5.
Memory
DDR5 only — 4 DIMM slots supporting up to 256 GB and speeds up to 8200+ MT/s with AMD EXPO.
Graphics & Storage
PCIe 5.0 x16 slot and primary PCIe 5.0 M.2 slot for next-gen performance.
Networking
Integrated Wi-Fi 7 with EZ Antenna and high-bandwidth 5G LAN wired Ethernet.
Case
Standard ATX form factor (30.5 cm x 24.4 cm) — fits standard Mid-Tower and Full-Tower cases.
EZ DIY Features
Includes EZ PCIe Clip II and EZ M.2 Shield Frozr II for tool-free GPU and NVMe installation.
Full Specification Sheet
MSI MAG B850 GAMING PLUS MAX WIFI| CPU Socket | AMD Socket AM5 (LGA 1718) |
| CPU Support | AMD Ryzen 9000 / 8000 / 7000 Series Desktop Processors |
| Chipset | AMD B850 Chipset |
| Form Factor | ATX (30.48 cm x 24.38 cm) |
| Power Design | 12+2+1 Duet Rail Power System with extended heatsinks |
| Memory Slots | 4 × DDR5 DIMM, dual channel |
| Max Memory | 256 GB (up to DDR5-8200+ MT/s OC with AMD EXPO) |
| Primary Graphics Slot | 1 × PCIe 5.0 x16 (Steel Armor, EZ PCIe Clip II) |
| Secondary PCIe Slots | 1 × PCIe 4.0 x16 (x4 mode), 2 × PCIe 3.0 x1 |
| M.2 Storage Sockets | 3 × M.2 (M.2_1 PCIe 5.0 x4, M.2_2 PCIe 4.0 x4, M.2_3 PCIe 4.0 x2) |
| SATA Ports | 4 × SATA 6 Gb/s |
| Wireless Networking | Wi-Fi 7 (802.11be) + Bluetooth 5.4 |
| Ethernet LAN | Realtek 5 Gbps Gaming LAN |
| Audio | Realtek ALC897 7.1-Channel HD Audio with Audio Boost |
| Rear USB Ports | 1x USB-C 10Gbps, 3x USB 3.2 10Gbps, 4x USB 3.2 5Gbps |
