MSI Pro B860M-A WiFi6E M-ATX Motherboard
MPN PRO-B860M-A-WIFI6E · Brand MSI · mATX
MSI PRO B860M-A WiFi 6E is a Micro-ATX motherboard for Intel Core Ultra Series 2 processors (LGA1851) featuring DDR5 support up to 8800+ MT/s, PCIe 5.0 x16 and M.2 Gen 5, 5G LAN, Wi-Fi 6E, and a 12+1+1+1 VRM design
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Overview
The MSI PRO B860M-A WiFi 6E is a Micro-ATX motherboard built on the Intel B860 chipset with an LGA1851 socket, designed to pair with Intel Core Ultra Series 2 processors. Its compact form factor makes it a strong choice for space-efficient builds without sacrificing connectivity or power delivery capability. The board ships with a 12+1+1+1 Duet Rail Power System using high-quality power stages, fed by 8+4-pin CPU power connectors. A 6-layer server-grade PCB underpins signal integrity, while MSI's PCB Fabric Technology aims to reduce signal loss and improve impedance control across the board. Memory support spans four DDR5 UDIMM slots in dual-channel configuration, accepting non-ECC unbuffered modules and CUDIMM. JEDEC speeds run from 4800 to 6400 MT/s, while XMP 3.0 and MSI Memory Boost enable overclocked operation up to 8800+ MT/s (1DPC 1R configuration). Maximum capacity is 256 GB. MSI's Memory Extension Mode can combine XMP profiles to fine-tune latency and frequency simultaneously. On the expansion side, the primary PCIe slot runs at Gen 5 x16 (from CPU), ideal for current-generation discrete graphics cards. An M.2 slot supporting PCIe 5.0 x4 (Lightning Gen 5) is present for high-speed NVMe storage. Three additional PCIe 4.0 slots from the chipset round out the expansion options. Networking is covered by 5G LAN and an integrated Wi-Fi 6E module with Bluetooth 5.3, supported by MSI's EZ Antenna for straightforward antenna installation. Audio output is handled by MSI's Audio Boost solution for cleaner signal separation. The Frozr Guard thermal system includes an extended VRM heatsink, 7W/mK MOSFET thermal pads, additional choke thermal pads, an M.2 Shield Frozr for NVMe drives, and a chipset heatsink to manage heat under sustained loads. Overcurrent Protection (OCP) guards the USB ports, DDR memory, PWM IC, and CPU. Transient Voltage Suppressors (TVS) are fitted across the board for protection against voltage spikes. The rear I/O panel is pre-installed to simplify assembly and includes HDMI, DisplayPort, USB 2.0, USB 5Gbps Type-A, USB 10Gbps Type-A, USB 5Gbps Type-C, 5G LAN, Wi-Fi/Bluetooth antenna ports, and audio jacks. Internal headers include a Thunderbolt 5 card connector (JTBT5 with RTD3 support), two ARGB V2 headers, one RGB header, TPM 2.0 header, and a chassis intrusion connector. Key Verified Specifications: - Socket: LGA1851 - Chipset: Intel B860 - Form Factor: Micro-ATX - CPU Support: Intel Core Ultra Series 2 - Memory: 4x DDR5 UDIMM slots, dual-channel, up to 256 GB - Memory Speed: 4800–6400 MT/s (JEDEC); up to 8800+ MT/s (OC, 1DPC 1R) - XMP Support: Intel XMP 3.0 - Primary PCIe Slot: Gen 5 x16 (CPU) - M.2: PCIe 5.0 x4 (Lightning Gen 5) - Wireless: Wi-Fi 6E + Bluetooth 5.3 - LAN: 5G - Display Output: 1x HDMI, 1x DisplayPort - Power Connectors: 24-pin ATX + 8+4-pin CPU - VRM: 12+1+1+1 digital power phases - Warranty: 3 Years
Datasheet
| Memory Type | DDR5 |
|---|---|
| Warranty | 3 Years |
| Form Factor | mATX |
| Chipset | B860 |
| Socket | LGA1851 |
| CPU Type | Core Ultra |
| Max Memory | 256 GB |
| Memory Speed | up to 8800+ |
| Platform | INTEL |
| Graphics Port | 1x HDMI,1x DisplayPort |
| Memory Feature | 4x DDR5 UDIMM, Maximum Memory Capacity 256GB 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 7200+ MT/s • 2DPC 1R Max speed up to 6400+ MT/s • 2DPC 2R Max speed up to 5600+ 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 only have single-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 MSI Official Website |
| Expansion Slots | 4x PCI-E x16 slot PCI_E1 Gen PCIe 5.0 supports up to x16 (From CPU) PCI_E2 Gen PCIe 4.0 supports up to x1 (From Chipset) PCI_E3 Gen PCIe 4.0 supports up to x1 (From Chipset) PCI_E4 Gen PCIe 4.0 supports up to x4 (From Chipset) |
| Channel Supported | Dual Channel |
| Wireless Networking | Wi-Fi 6E,Bluetooth 5.3 |
| Back Panel I/O Ports | DisplayPort Keyboard / Mouse USB 5Gbps Type-A 5G LAN Wi-Fi / Bluetooth Audio Connectors HDMI USB 2.0 Clear CMOS Button USB 10Gbps Type-A USB 5Gbps Type-C |
| Internal I/O Connector | 1x Thunderbolt5 card connector(JTBT5, support RTD3) 1x Power Connector(ATX_PWR) 2x Power Connector(CPU_PWR) 1x Power Connector(PCIE_PWR 8pin) 1x CPU Fan 1x Combo Fan (Pump_Sys Fan) 3x System Fan 2x Front Panel (JFP) 1x Chassis Intrusion (JCI) 1x Front Audio (JAUD) 1x Com Port (JCOM) 1x Tuning Controller connector(JDASH) 2x Addressable V2 RGB LED connector (JARGB_V2) 1x RGB LED connector(JRGB) 1x TPM pin header(Support TPM 2.0) 4x USB 2.0 ports 4x USB 5Gbps Type A ports 1x USB 10Gbps Type C ports |
