MSI PRO B860M-S DDR5 LGA 1851 Motherboard


Chipset: Intel B860; supports Intel Core Ultra (Series 2) processors on LGA 1851.

Memory: 2 × DDR5 UDIMM slots, up to 128 GB, 4800–8800 MT/s (JEDEC/XMP 3.0), dual‑channel, non‑ECC.

Expansion & Storage: 1 × PCIe 5.0 x16, 1 × PCIe 4.0 x1; 1 × M.2 (PCIe 4.0 x4, 2280/2260), 4 × SATA 6 Gb/s.

Connectivity: HDMI 2.1 and DisplayPort 1.4 video outputs, Realtek ALC897 7.1‑channel audio, Realtek 8125D 2.5 Gbps LAN, USB: 4 × 2.0 rear, 4 × 2.0 front, 2 × 5 Gbps Type‑A rear, 2 × 5 Gbps Type‑A front, 1 × 5 Gbps Type‑C front.

Specifications

Chipset INTEL B860
CPU Supports Intel® Core™ Ultra Processors (Series 2) LGA 1851
Memory 2x DDR5 UDIMM, Maximum Memory Capacity 128GB Memory Support DDR5 8800 – 6400 (OC) MT/s / 6400 – 4800 (JEDEC) MT/s Max. overclocking frequency: • 1DPC 1R Max speed up to 8800 MT/s • 1DPC 2R Max speed up to 6400 MT/s Supports Intel ® POR Speed and JEDEC Speed Supports Memory Overclocking and Intel ® XMP 3.0 Supports Dual-Controller Dual-Channel mode Supports Non-ECC, Un-buffered memory Supports CUDIMM • The DIMM slots on this motherboard have double-sided latches. • Memory compatibility and supported speeds can vary depending on the CPU and memory configuration. For detailed information, please refer to the Memory Compatibility List available on the product’s Support page or visit https://www.msi.com/support/.
Onboard Graphics 1x HDMI™ Support HDMI™ 2.1, maximum resolution of 4K 60Hz* 1x DisplayPort Support DisplayPort 1.4, maximum resolution of 4K 60Hz* *Available only on processors featuring integrated graphics. Graphics specifications may vary depending on the CPU installed.
Slot 1x PCI-E x16 slot (Qty) 1x PCI-E x1 slot (Qty) PCI_E1 Gen PCIe 5.0 supports up to x16 (From CPU) PCI_E2 Gen PCIe 4.0 supports up to x1 (From Chipset)
Audio Realtek ® ALC897 Codec 7.1-Channel High Definition Audio
Storage 1x M.2 (Qty) M.2_1 Source (From Chipset) supports up to PCIe 4.0 x4 , supports 2280/2260 devices 4x SATA 6G (Qty) *Please refer to the manual for M.2 SSD heatsink restrictions.
USB 4x USB 2.0 (Rear) 4x USB 2.0 (Front) 2x USB 5Gbps Type A (Rear) 2x USB 5Gbps Type A (Front) 1x USB 5Gbps Type C (Front)
LAN Realtek 8125D 2.5Gbps LAN
Internal IO 1x Power Connector(ATX_PWR) 1x Power Connector(CPU_PWR) 1x CPU Fan 2x System Fan 2x Front Panel (JFP) 1x Chassis Intrusion (JCI) 1x Front Audio (JAUD) 3x Addressable V2 RGB LED connector (JARGB_V2) 1x TPM pin header(Support TPM 2.0) 4x USB 2.0 ports 2x USB 5Gbps Type A ports 1x USB 5Gbps Type C ports
LED FEATURE 4x EZ Debug LED 1x EZ Memory Detection LED
OPERATING SYSTEM Support for Windows 11 64-bit
PCB Info mATX 220mmx243.84mm

Key Features

  • Intel B860 Chipset with LGA 1851 Support: Compatible with Intel® Core™ Ultra Processors (Series 2) for high‑performance computing.
  • DDR5 Memory Capability: Dual‑channel 2 × DDR5 UDIMM slots, up to 128 GB total, supporting speeds up to 8800 MT/s (OC) and 6400 MT/s JEDEC.
  • PCIe Expansion: 1 × PCIe 5.0 x16 slot (CPU‑direct) and 1 × PCIe 4.0 x1 slot for graphics and add‑in cards.
  • High‑Speed Storage Options: 1 × M.2 slot (PCIe 4.0 x4) for NVMe SSDs and 4 × SATA 6 Gb/s ports for additional drives.
  • Robust Connectivity: 2 × USB 3.2 Gen 2 Type‑A (rear), 2 × USB 3.2 Gen 2 Type‑A (front), 1 × USB 3.2 Gen 2 Type‑C (front), plus 8 × USB 2.0 ports.
  • 2.5 Gbps Ethernet & 7.1‑Channel Audio: Realtek 8125D LAN for fast network speeds and Realtek ALC897 codec delivering high‑definition 7.1‑channel sound.
  • Integrated Video Outputs: HDMI 2.1 and DisplayPort 1.4, each supporting up to 4K 60 Hz when paired with CPUs that have integrated graphics.
SKU: 1098784 Category:
Chipset INTEL B860
CPU Supports Intel® Core™ Ultra Processors (Series 2) LGA 1851
Memory 2x DDR5 UDIMM, Maximum Memory Capacity 128GB Memory Support DDR5 8800 – 6400 (OC) MT/s / 6400 – 4800 (JEDEC) MT/s Max. overclocking frequency: • 1DPC 1R Max speed up to 8800 MT/s • 1DPC 2R Max speed up to 6400 MT/s Supports Intel ® POR Speed and JEDEC Speed Supports Memory Overclocking and Intel ® XMP 3.0 Supports Dual-Controller Dual-Channel mode Supports Non-ECC, Un-buffered memory Supports CUDIMM • The DIMM slots on this motherboard have double-sided latches. • Memory compatibility and supported speeds can vary depending on the CPU and memory configuration. For detailed information, please refer to the Memory Compatibility List available on the product’s Support page or visit https://www.msi.com/support/.
Onboard Graphics 1x HDMI™ Support HDMI™ 2.1, maximum resolution of 4K 60Hz* 1x DisplayPort Support DisplayPort 1.4, maximum resolution of 4K 60Hz* *Available only on processors featuring integrated graphics. Graphics specifications may vary depending on the CPU installed.
Slot 1x PCI-E x16 slot (Qty) 1x PCI-E x1 slot (Qty) PCI_E1 Gen PCIe 5.0 supports up to x16 (From CPU) PCI_E2 Gen PCIe 4.0 supports up to x1 (From Chipset)
Audio Realtek ® ALC897 Codec 7.1-Channel High Definition Audio
Storage 1x M.2 (Qty) M.2_1 Source (From Chipset) supports up to PCIe 4.0 x4 , supports 2280/2260 devices 4x SATA 6G (Qty) *Please refer to the manual for M.2 SSD heatsink restrictions.
USB 4x USB 2.0 (Rear) 4x USB 2.0 (Front) 2x USB 5Gbps Type A (Rear) 2x USB 5Gbps Type A (Front) 1x USB 5Gbps Type C (Front)
LAN Realtek 8125D 2.5Gbps LAN
Internal IO 1x Power Connector(ATX_PWR) 1x Power Connector(CPU_PWR) 1x CPU Fan 2x System Fan 2x Front Panel (JFP) 1x Chassis Intrusion (JCI) 1x Front Audio (JAUD) 3x Addressable V2 RGB LED connector (JARGB_V2) 1x TPM pin header(Support TPM 2.0) 4x USB 2.0 ports 2x USB 5Gbps Type A ports 1x USB 5Gbps Type C ports
LED FEATURE 4x EZ Debug LED 1x EZ Memory Detection LED
OPERATING SYSTEM Support for Windows 11 64-bit
PCB Info mATX 220mmx243.84mm

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