MSI PRO B860M-A WIFI Micro-ATX Motherboard

Chipset

INTEL B860

CPU Support

Supports Intel® Core™ Ultra Processors (Series 2) on LGA 1851

Memory

- Slots: 4x DDR5 UDIMM
- Maximum Capacity: 256GB
- Supported Speeds:
  • 8800 - 6400 (OC) MT/s
  • 6400 - 4800 (JEDEC) MT/s
- Max. Overclocking Frequencies:
  • 1DPC 1R: up to 8800+ MT/s
  • 1DPC 2R: up to 7200+ MT/s
  • 2DPC 1R: up to 6400+ MT/s
  • 2DPC 2R: up to 5600+ MT/s
- Supports Intel® POR Speed, JEDEC Speed, Memory Overclocking, and Intel® XMP 3.0
- Supports Dual-Controller Dual-Channel mode
- Supports Non-ECC, Un-buffered memory and CUDIMM
- Note: DIMM slots feature single-sided latches. Memory compatibility may vary—please refer to the MSI Support page for details.

Onboard Graphics

- HDMI: 1x HDMI™ port supporting HDMI™ 2.1 (up to 4K 60Hz*)
- DisplayPort: 1x DisplayPort supporting DP 1.4 (up to 4K 60Hz*)
- Type-C: 1x Type-C DisplayPort (Thunderbolt™ 4) supporting DisplayPort 2.1 with UHBR20 (up to 4K@120Hz / 8K@60Hz*)
*Available only with processors featuring integrated graphics.

Expansion Slots

4x PCI-E x16 slots:
- PCI_E1: PCIe 5.0 x16 (from CPU)
- PCI_E2: PCIe 4.0 x1 (from Chipset)
- PCI_E3: PCIe 4.0 x1 (from Chipset)
- PCI_E4: PCIe 4.0 x4 (from Chipset)

Audio

Realtek® ALC897 Codec with 7.1-Channel High Definition Audio

Storage

- M.2 Slots: 3x
  • M.2_1: (From CPU) PCIe 5.0 x4; supports 2280/2260/2242 devices
  • M.2_2: (From Chipset) PCIe 4.0 x4; supports 2280/2260 devices
  • M.2_3: (From Chipset) PCIe 4.0 x2; supports 2280 devices
- SATA: 4x SATA 6G
Please refer to the manual for M.2 SSD heatsink restrictions.

RAID

Supports RAID 0, RAID 1, RAID 5, and RAID 10 for SATA storage devices

Onboard Thunderbolt

1x Thunderbolt4 port (Rear) featuring:
- Up to 40Gbps transfer rate with Thunderbolt devices
- Up to 20Gbps with USB4 devices
- Up to 10Gbps with USB 3.2 devices
- Supports 5V/3A (15W) power charging
- Daisy-chain support: up to 3 Thunderbolt 4 devices or 5 Thunderbolt 3 devices
- Supports up to 8K display

USB Ports

Rear:
- 2x USB 2.0
- 2x USB 5Gbps (1 Type-A & 1 Type-C)
- 1x USB 10Gbps Type-A
Front:
- 4x USB 2.0
- 4x USB 5Gbps Type-A
- 1x USB 10Gbps Type-C

LAN

Realtek® 8126 5Gbps LAN

Internal I/O Connectors

- 1x Thunderbolt5 card connector (JTBT5, supports RTD3)
- 1x Power Connector (ATX_PWR)
- 2x Power Connectors (CPU_PWR)
- 1x Power Connector (PCIE_PWR 8pin)
- 1x CPU Fan header
- 1x Combo Fan (Pump_Sys Fan) header
- 3x System Fan headers
- 2x Front Panel headers (JFP)
- 1x Chassis Intrusion header (JCI)
- 1x Front Audio header (JAUD)
- 1x Com Port header (JCOM)
- 1x Tuning Controller connector (JDASH)
- 2x Addressable V2 RGB LED connectors (JARGB_V2)
- 1x RGB LED connector (JRGB)
- 1x TPM header (supports TPM 2.0)
- Additional internal USB headers: 4x USB 2.0, 4x USB 5Gbps Type-A, and 1x USB 10Gbps Type-C

Wireless LAN & Bluetooth

- Wireless: Intel® Wi-Fi 7 (pre-installed in the M.2 Key-E slot) supporting MU-MIMO TX/RX, 2.4GHz / 5GHz / 6GHz* (320MHz) up to 5.8Gbps, and 802.11 a/b/g/n/ac/ax/be
- Bluetooth: Bluetooth® 5.4 with MLO and 4KQAM
6GHz band support may depend on local regulations; Wi-Fi 7 and Bluetooth 5.4 will be ready in Windows 11 version 24H2.

LED Feature

4x EZ Debug LEDs

Back Panel Ports

- DisplayPort
- Keyboard / Mouse ports
- USB 5Gbps Type-A
- 5G LAN
- Wi-Fi / Bluetooth
- Audio Connectors
- HDMI™
- Thunderbolt™ 4 40Gbps (Type-C)
- USB 2.0
- Clear CMOS Button
- USB 10Gbps Type-A
- USB 5Gbps Type-C

Operating System

Supports Windows® 11 (64-bit)

PCB/Form Factor

mATX; Dimensions: 243.84mm x 243.84mm