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
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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

  1. DisplayPort
  2. HDMI
  3. USB 5Gbps Type-A
  4. Clear CMOS Button
  5. USB 2.0
  6. 5G LAN
  7. Audio Connectors
  8. USB 5Gbps Type-C
  9. Flash BIOS Button
  10. USB 5Gbps Type-A
Operating System
Support Windows 11 64-bit
PCB Info
Form Factor mATX
Dimensions 226mm x 243.84mm

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.

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