MSI MAG B860M MORTAR WIFI M-ATX LGA1851 DDR5 Gaming Motherboard — Intel B860 Chipset, Supports Intel 14th/13th Gen Core CPUs, DDR5 up to 9200+ MHz (OC), PCIe 5.0 x16, 3x M.2 Slots (Gen5/Gen4), Wi-Fi 7, 5G LAN, Thunderbolt 4, HDMI 2.1, DP 1.4

General Information

The MSI MAG B860M MORTAR WIFI is a high-performance micro-ATX motherboard designed for the Intel LGA1851 socket, supporting the latest Intel® Core™ Ultra Processors (Series 2). It represents a significant leap forward from the previous generation, featuring PCIe 5.0 support, DDR5-9200+ memory overclocking, Wi-Fi 7, and Thunderbolt™ 4 connectivity.

Built with MSI’s renowned “MAG” series DNA—focusing on robust power delivery, advanced cooling, and premium components—this board is engineered for enthusiasts, gamers, and creators who demand top-tier performance and reliability in a compact form factor.

CPU & Socket

• Socket: LGA1851
• Supported CPUs: Intel® Core™ Ultra Processors (Series 2)
• Chipset: Intel® B860 – A new, feature-rich chipset designed to unlock the full potential of the Ultra Series 2 processors, offering enhanced I/O and PCIe lane allocation compared to lower-tier chipsets.
• Features:
  • Supports Intel® Turbo Boost Technology 2.0 and Intel® Turbo Boost Max Technology 3.0
  • Optimized for AI workloads via integrated NPU (Neural Processing Unit)

Memory

• Slots: 4 x DDR5 UDIMM
• Max Capacity: 256GB (4 x 64GB)
• Speed Support (OC): Up to 9200+ MT/s
• JEDEC Speeds: 4800, 5000, 5200, 5400, 5600, 5800, 6000, 6200, 6400 MHz
• Overclocking Limits (Ryzen™ 9000 Series):
  • 1DPC 1R: Up to 9200+ MT/s
  • 1DPC 2R: Up to 7200+ MT/s
  • 2DPC 1R: Up to 6400+ MT/s
  • 2DPC 2R: Up to 5600+ MT/s
• Technology Support:
  • Intel® XMP 3.0 for easy one-click overclocking
  • Intel® POR Speed for optimized boot frequencies
  • Supports Non-ECC, Un-buffered DDR5 memory
  • CUDIMM (Clock Driver bypass mode) support
• Architecture: Dual-Channel Mode
• Compatibility Note:
  • Memory compatibility and speeds are highly dependent on the specific CPU and RAM module used. Always consult the official MSI Memory Compatibility List for guaranteed configurations.
  • DIMM slots feature single-sided latches for easier installation.

Graphics & Display Outputs

• Integrated Graphics Support:
  • 1 x HDMI™ 2.1 with FRL – Supports 8K@60Hz
  • 1 x DisplayPort 1.4 – Supports 4K@60Hz
  • 1 x USB Type-C Port (Thunderbolt™ 4) – Supports DisplayPort 2.1 UHBR20 output, enabling 4K@120Hz or 8K@60Hz
• Note: All display outputs require a CPU with integrated graphics (i.e., Core Ultra 5/7/9). The maximum resolution and refresh rate depend on the specific CPU's integrated GPU capabilities.
• Multi-Monitor Support: Supports up to three displays simultaneously (HDMI + DP + Thunderbolt).

Expansion Slots

• PCIe Slots:
  • PCI_E1 (CPU): PCIe 5.0 x16 – Full bandwidth for the primary GPU
    • Note: This slot will operate at x16 only with Core Ultra 9 processors; it may run at x8 or x4 with lower-tier CPUs due to chipset lane allocation.
  • PCI_E2 (Chipset): PCIe 4.0 x4 – Ideal for high-speed NVMe SSD expansion cards or capture cards.

Storage

• M.2 Slots (Total: 3):
  • M.2_1 (CPU): PCIe 5.0 x4 – Primary slot for the fastest Gen5 NVMe SSD (supports 2280/2260/2242)
  • M.2_2 (Chipset): PCIe 4.0 x4 – Secondary high-speed NVMe slot (supports 2280/2260)
  • M.2_3 (Chipset): PCIe 4.0 x4 – Third high-speed NVMe slot (supports 2280/2260)
• SATA Ports: 4 x SATA 6Gb/s
• RAID Support:
  • SATA RAID 0, 1, 5, 10
  • NVMe RAID 0, 1, 5, 10 (via chipset)
• Note: M.2_2 and M.2_3 share bandwidth with other chipset resources. Consult the manual for any potential conflicts.

Audio

• Codec: Realtek® ALC897
• Channels: 7.1-Channel High Definition Audio
• Features:
  • S/PDIF Output – For connecting to external audio systems
  • Gold-plated audio jacks
  • Premium audio capacitors
  • Dedicated PCB audio layer for noise isolation
  • Jack detection, multi-streaming, front panel jack retasking

Networking

• Ethernet:
  • Intel® Killer™ E5000 5Gbps LAN – Advanced networking with traffic prioritization for gaming and streaming
• Wireless & Bluetooth:
  • Intel® Killer™ BE1750x Wi-Fi 7 – Pre-installed in the M.2 (Key-E) slot
    • Supports 2.4GHz / 5GHz / 6GHz bands
    • 320MHz bandwidth – up to 5.8 Gbps theoretical speed
    • Supports 802.11be (Wi-Fi 7)
  • Bluetooth® 5.4 – Features Multi-Link Operation (MLO) and 4KQAM for improved range and efficiency
• Notes:
  • Full Wi-Fi 7 functionality requires Windows 11 SV3 (24H2 update or later).
  • Bluetooth 5.4 support depends on Microsoft's Windows 11 update schedule.

USB Connectivity

• Rear I/O (Total: 10 ports):
  • 1 x Thunderbolt™ 4 (40Gbps) USB Type-C
  • 3 x USB 10Gbps (Type-A)
  • 1 x USB 10Gbps (Type-C)
  • 4 x USB 2.0 (Type-A)
• Front Panel Headers (Total: 7 ports):
  • 1 x USB 10Gbps (Type-C) header
  • 2 x USB 5Gbps (Type-A) headers
  • 4 x USB 2.0 headers
• Power Delivery:
  • Thunderbolt™ 4 port supports up to 15W (5V/3A) for charging peripherals.
• Note: The Thunderbolt™ 4 port also supports USB4 (20Gbps) and USB 3.2 (10Gbps/5Gbps) devices.

Cooling & Power Delivery

• VRM Design: Robust 12+2+1 Phase Digital VRM with DrMOS transistors and high-quality chokes and capacitors for stable power under heavy loads.
• Cooling Features:
  • Large, extended VRM heatsink with thermal pads
  • Chipset heatsink
  • M.2 heatsinks for all three M.2 slots
  • Frozr AI – Intelligent fan control for optimal thermal performance
• Fan Headers:
  • 1 x CPU Fan
  • 1 x Combo Fan (Pump_Sys Fan) – for AIO liquid coolers
  • 4 x System Fan headers (PWM/DC)

RGB & Lighting

• RGB Headers:
  • 3 x Addressable Gen2 RGB (JARGB_V2) – for ARGB strips and fans
  • 1 x Standard RGB (JRGB) – for non-addressable LED strips
• Software: MSI Center for unified lighting control across compatible components

Internal I/O Connectors

• Power:
  • 1 x ATX 24-pin
  • 2 x 8-pin EPS CPU Power (for stability under load)
  • 1 x PCIe 8-pin (PCIE_PWR) – for additional power to high-end GPUs
• Fan & Cooling:
  • 1 x CPU Fan
  • 1 x Combo Fan (Pump_Sys Fan)
  • 4 x System Fan headers
• Other:
  • 1 x Thunderbolt™ 5 card connector (JTBT5) – for optional Thunderbolt™ 5 expansion
  • 2 x Front Panel (JFP) – power/reset buttons, LEDs
  • 1 x Chassis Intrusion (JCI)
  • 1 x Front Audio (JAUD)
  • 1 x Tuning Controller connector (JDASH)
  • 1 x Clear CMOS button
  • 1 x TPM 2.0 header
  • 1 x COM Port (JCOM)
  • 1 x Thermal Sensor header
  • 1 x S/PDIF-Out

Special Features

• MSI MAG Series Advantages:
  • Military-grade components for enhanced durability
  • Stainless-steel reinforced PCIe slot
  • Pre-installed I/O shield
• EZ DIY Features:
  • BIOS FlashBack™ button – update BIOS without CPU, RAM, or GPU
  • Clear CMOS button – reset BIOS settings easily
  • EZ Debug LEDs – 4-stage diagnostic LEDs (CPU, DRAM, VGA, Boot)
  • EZ Memory Detection LED
  • M.2 Q-Latch – tool-less M.2 SSD installation
  • M.2 Q-Slide – easy insertion/removal
• Software:
  • MSI Center – system monitoring, tuning, RGB control
  • MSI Afterburner – world-leading GPU overclocking software
  • AI Tuning – intelligent system optimization

Physical Specifications

• Form Factor: Micro-ATX (243.84 x 243.84 mm)
• Dimensions (with stand): ~244 x 244 mm
• Weight: ~1.2 kg

Operating System Support

• Officially Supported: Windows® 11 64-bit (SV3/24H2 recommended for full Wi-Fi 7 and Thunderbolt™ 5 features)

Package Contents

• 1 x MSI MAG B860M MORTAR WIFI Motherboard
• 1 x I/O Shield (pre-installed)
• 2 x SATA 6Gb/s cables
• 1 x Wi-Fi antenna set
• 1 x Quick Start Guide
• 1 x Driver & Utility DVD (optional – download preferred)