| Specification | Details |
|---|---|
| Chipset | AMD B850 |
| CPU | Supports AMD Ryzen 9000 / 8000 / 7000 Series Desktop Processors Socket AM5 |
| Memory | |
| Configuration | 2x DDR5 UDIMM, Maximum Memory Capacity 128GB |
| Memory Support | DDR5 8200 – 5600 (OC) MT/s / 5600 – 4800 (JEDEC) MT/s |
| Ryzen 9000 Series Max Overclocking Frequency | 1DPC 1R: Up to 8200+ MT/s 1DPC 2R: Up to 8000+ MT/s |
| Features | Supports AMD POR Speed and JEDEC Speed Supports Memory Overclocking and AMD EXPO Supports Dual-Channel Mode Supports Non-ECC, Un-buffered Memory Supports CUDIMM, Clock Driver Bypass Mode Only* |
| Notes | * CUDIMM support and POR boot frequency may vary by CPU series, with manual overclocking available after boot. Certain CPUs may fail to boot, but future BIOS updates will improve compatibility. – The DIMM slots on this motherboard have single-sided latches. – Memory compatibility and supported speeds depend on CPU and configuration. Visit https://www.msi.com/support/ for details. |
| Onboard Graphics | |
| Ports | 1x HDMI Supports HDMI 2.1, maximum resolution 4K 60Hz* 1x DisplayPort Supports DisplayPort 1.4, maximum resolution 4K 60Hz* *Available only on processors featuring integrated graphics. Graphics specifications may vary depending on the CPU installed. |
| Expansion Slots | |
| Slots | 2x PCI-E x16 Slots PCI_E1 Gen PCIe 5.0 supports up to x16 (From CPU) PCI_E2 Gen PCIe 4.0 supports up to x4 (From Chipset) |
| PCI_E1 Slot | – PCIe 5.0 x16 (Ryzen 9000 / 7000) – PCIe 4.0 x8 (Ryzen 8700 / 8600 / 8400) – PCIe 4.0 x4 (Ryzen 8500 / 8300) |
| Audio | |
| Codec | Realtek ALC897 |
| Channels | 7.1-Channel High Definition Audio |
| Storage | |
| Configuration | 1x M.2 M.2_1 (From CPU): PCIe 5.0 x4, supports 2280/2260 devices 4x SATA 6G |
| M.2_1 Slot | – PCIe 5.0 x4 (Ryzen 9000 / 7000) – PCIe 4.0 x4 (Ryzen 8000) |
| RAID | |
| Support | Supports RAID 0, RAID 1, and RAID 10 for SATA Storage Devices |
| USB | |
| Configuration | 2x USB 2.0 (Rear) 4x USB 2.0 (Front) 3x USB 5Gbps Type-A (Rear) 1x USB 5Gbps Type-C (Rear) 2x USB 5Gbps Type-A (Front) 1x USB 10Gbps Type-C (Front) |
| LAN | |
| Port | Realtek 8126VB 5G LAN |
| Internal I/O | |
| Connectors | 1x ATX Power (ATX_PWR) 1x CPU Power (CPU_PWR) 1x CPU Fan 1x Combo Fan (Pump_Sys Fan) 2x System Fans 2x Front Panels (JFP) 1x Chassis Intrusion (JCI) 1x Front Audio (JAUD) 1x COM Port (JCOM) 3x Addressable V2 RGB (JARGB_V2) 1x RGB LED (JRGB) 1x TPM Header (Supports TPM 2.0) 4x USB 2.0 Ports 2x USB 5Gbps Type-A Ports 1x USB 10Gbps Type-C Port |
| LED Features | |
| Indicators | 4x EZ Debug LED 1x EZ Memory Detection LED |
| Back Panel Ports | |
| Configuration |
|
| Operating System | |
| Support | Windows 11 64-bit |
| PCB Info | |
| Form Factor | mATX |
| Dimensions | 226mm x 243.84mm |
MSI PRO B850M-X
- Supports AMD Ryzen™ 9000 / 8000 / 7000 Series Desktop Processors
- Supports DDR5 Memory, Dual Channel DDR5 8200+ MT/s (OC)
- Ultra Performance: Direct 7+2+1 Power System with P-PAK, an 8-pin CPU power connector, Core Boost, Memory Boost, 6-layer PCB made by 2oz thickened copper and server-grade level material
- EZ PCIe Clip II: Allows for easy removal of the graphics card by pressing the tail-like lock with one finger, even in the cramped case spaces.
- Lightning Fast Game experience: PCIe 5.0 slot and Lightning Gen 5 x4 M.2
- Audio Boost: Reward your ears with studio-grade sound quality for the most immersive gaming experience
Overview
MSI PRO B850M-X
The MSI PRO B850M-X is a reliable and efficient micro-ATX motherboard designed to deliver outstanding performance for professionals, creators, and everyday users. Powered by the AMD B850 chipset, it supports AMD Ryzen™ 9000, 8000, and 7000 Series Desktop Processors, offering excellent computing power and future-ready performance.
With dual-channel DDR5 memory support up to 8200+ MT/s (OC), the PRO B850M-X ensures superior multitasking speed and data handling efficiency. It features a Direct 7+2+1 Power System with P-PAK, an 8-pin CPU power connector, and MSI’s Core Boost and Memory Boost technologies for stable and optimized power delivery. The 6-layer PCB crafted with 2oz thickened copper and server-grade materials enhances thermal conductivity, signal integrity, and long-term durability.
MSI’s Frozr Guard thermal design with extended heatsinks and 7W/mK MOSFET thermal pads keeps the system cool and ensures non-stop performance under heavy workloads. The EZ PCIe Clip II design simplifies GPU installation and removal, even in compact builds, offering excellent convenience during upgrades or maintenance.
For next-gen performance, the board includes PCIe 5.0 and Lightning Gen 5 x4 M.2 support, providing ultra-fast data transfer speeds and maximum bandwidth for high-speed storage and graphics cards. The built-in 5G LAN guarantees a secure, stable, and high-speed connection ideal for both professional and multimedia use.
Enhancing the experience further, Audio Boost technology delivers rich, studio-grade sound quality, ensuring every detail in music, movies, and games is heard with precision.
The MSI PRO B850M-X combines power, efficiency, and user-friendly features, making it a perfect choice for compact, high-performance builds that don’t compromise on stability or connectivity.









