ASRock B860M Pro-A Intel LGA1851 DDR5 Micro-ATX Motherboard

Advanced Performance for Next-Generation Intel Builds

The ASRock B860M Pro-A is a feature-rich Micro-ATX motherboard designed for the latest Intel Core Ultra Series 2 processors. Built around the Intel B860 chipset, it offers premium connectivity, robust power delivery, extensive storage expansion and high-speed DDR5 memory support, making it ideal for gaming, content creation, productivity and AI-powered computing.

Featuring a 10+1+1+1+1 Dr.MOS power design, PCIe 5.0 graphics support, PCIe 5.0 M.2 storage, 2.5Gb Ethernet, and support for up to 256GB DDR5 memory, the B860M Pro-A delivers exceptional versatility for enthusiasts and professional users alike.

Key Features & Benefits

Supports Intel Core Ultra Processors (Series 2)

Ready for the latest Intel LGA1851 processors, including support for AI-enhanced workloads through integrated NPU acceleration.

Powerful 10+1+1+1+1 Dr.MOS Power Design

Premium power delivery ensures stable operation, efficient performance and reliable support for high-performance CPUs.

PCIe 5.0 Graphics Support

A full-speed PCIe 5.0 x16 slot provides maximum bandwidth for the latest graphics cards.

High-Speed DDR5 Memory

Supports up to 256GB of DDR5 memory with overclocking support up to 8666+ MHz for exceptional system performance.

Triple M.2 Storage Support

Install up to three NVMe SSDs, including one ultra-fast PCIe Gen5 x4 M.2 slot and two PCIe Gen4 x4 slots.

Ultra-Fast 2.5 Gigabit Networking

Dragon 2.5G LAN delivers lower latency and faster network performance for gaming, streaming and large file transfers.

USB 3.2 Gen2x2 Type-C Connectivity

Transfer files at speeds up to 20Gbps through the rear USB-C port.

Flexible Display Connectivity

Integrated graphics support includes HDMI 2.1 and DisplayPort 1.4 outputs for high-resolution multi-monitor setups.

BIOS Flashback Support

Update your BIOS quickly and conveniently using the dedicated BIOS Flashback button.

RGB Customisation

Polychrome Sync RGB support allows you to synchronise lighting effects across compatible components and accessories.

Technical Specifications

Processor Support

• Socket: LGA1851
• Supports Intel Core Ultra Processors (Series 2)
• Intel Hybrid Technology Support
• Intel Turbo Boost Max 3.0 Support
• Intel Thermal Velocity Boost (TVB)
• Intel Adaptive Boost Technology (ABT)
• Integrated AI NPU Support

Chipset

• Intel B860

Form Factor

• Micro-ATX
• Dimensions: 244 x 244mm (9.6" x 9.6")

Power Design

• 10+1+1+1+1 Phase Design
• Dr.MOS Power Stages
• Hi-Density Power Connectors

Memory

• 4 x DDR5 DIMM Slots
• Dual Channel Architecture
• Maximum Capacity: 256GB
• Supports DDR5 Non-ECC Unbuffered Memory
• Speeds Up To 8666+ MHz (OC)
• Intel XMP 3.0 Support
• CUDIMM Memory Support

Expansion Slots

• 1 x PCIe 5.0 x16 Slot
• 1 x PCIe 4.0 x4 Slot
• 1 x M.2 Key-E Slot for Wi-Fi/Bluetooth Module

Storage

M.2 Slots

• 1 x Blazing M.2 PCIe 5.0 x4 Slot
• 2 x Hyper M.2 PCIe 4.0 x4 Slots

SATA

• 4 x SATA III 6Gb/s Ports

RAID Support

• RAID 0
• RAID 1
• RAID 5
• RAID 10

Graphics Outputs

• 1 x HDMI 2.1
• 1 x DisplayPort 1.4
• Supports HDR and HDCP 2.3
• HDMI Resolution: Up to 4K at 120Hz
• DisplayPort Resolution: Up to 8K at 60Hz or 5K at 120Hz

Audio

• Realtek ALC897 7.1 Channel HD Audio

Networking

• Dragon RTL8125BG 2.5 Gigabit LAN
• 10/100/1000/2500 Mbps Support
• Dragon LAN Optimisation Software

USB Connectivity

Rear USB Ports

• 1 x USB 3.2 Gen2x2 Type-C (20Gbps)
• 3 x USB 3.2 Gen1 Type-A
• 2 x USB 2.0

Internal USB Headers

• 1 x USB 3.2 Gen1 Type-C Front Header
• 1 x USB 3.2 Gen1 Header (2 Ports)
• 2 x USB 2.0 Headers (4 Ports)

Rear I/O Panel

• 1 x HDMI 2.1
• 1 x DisplayPort 1.4
• 1 x USB 3.2 Gen2x2 Type-C
• 3 x USB 3.2 Gen1 Type-A
• 2 x USB 2.0
• 1 x RJ-45 LAN
• Audio Jacks
• BIOS Flashback Button
• 2 x Wi-Fi Antenna Mounting Points

Internal Connectors

• 1 x 24-Pin ATX Power Connector
• 1 x 8-Pin CPU Power Connector
• 1 x 4-Pin CPU Power Connector
• 1 x COM Port Header
• 1 x TPM Header
• 1 x RGB Header
• 3 x Addressable RGB Headers
• 2 x CPU Fan Headers
• 3 x Chassis Fan Headers
• 1 x AIO Pump Header
• 1 x Front Audio Header

Cooling Features

• Smart Fan Speed Control
• Automatic 3-Pin and 4-Pin Fan Detection
• Multiple High-Power Fan and Pump Headers

BIOS & Software

BIOS

• 256Mb AMI UEFI BIOS
• Graphical UEFI Interface
• ASRock EZ Mode
• Instant Flash
• Full HD UEFI

Software

• ASRock A-Tuning
• ASRock Dragon LAN Utility
• ASRock Polychrome Sync
• Auto Driver Installer

Operating System Support

• Microsoft Windows 11 64-Bit

Certifications

• ENERGY Efficient ErP/EuP Ready
• FCC Certified
• CE Certified
• RoHS Compliant

What's in the Box?

• ASRock B860M Pro-A Motherboard
• I/O Shield
• 2 x SATA Data Cables
• M.2 Installation Screw
• Documentation

Why Choose the ASRock B860M Pro-A?

The ASRock B860M Pro-A offers an exceptional combination of performance, expandability and future-proof technologies for modern Intel systems. Its robust 10+1+1+1+1 Dr.MOS power delivery, PCIe 5.0 graphics slot, Gen5 M.2 storage, 2.5Gb LAN and support for up to 256GB DDR5 memory make it an excellent platform for gaming PCs, content creation workstations and AI-enhanced productivity systems.

With multiple M.2 slots, extensive connectivity, advanced cooling support and premium networking capabilities, the B860M Pro-A provides everything needed to build a powerful and reliable next-generation desktop PC.