ASROCK B860M Pro-A
ASROCK B860M Pro-A
The ASROCK B860M Pro-A motherboard with the Intel B860 chipset is a compact solution for the Intel 1851 socket, featuring an advanced 10+1+1+1+1 phase power system with Dr.MOS technology. This Micro ATX board supports four DDR5 memory modules with overclocking up to 8666MHz via Intel XMP 3.0. Connectivity includes a PCIe 5.0 x16 slot, three M.2 slots (one with PCIe Gen5), four SATA III connectors, and 2.5Gb/s LAN. The DisplayPort 1.4 and HDMI 2.1 graphic outputs let you connect two displays.
Intel B860
Chipset
Intel 1851
Socket
mATX (Micro ATX)
Form factor
DDR5
Memory type
4×
Number of RAM slotsKey features of the ASROCK B860M Pro-A motherboard
- Supports Intel Core Ultra Series 2 processors on the LGA1851 socket with an integrated NPU for AI acceleration
- Advanced 10+1+1+1+1 phase power design with Dr.MOS technology ensures stable power delivery during overclocking
- Four DDR5 slots with overclocking capability up to 8666MHz via Intel XMP 3.0 and a total capacity of 256GB
- Three M.2 slots, including an ultra-fast PCIe Gen5 x4 with a transfer speed of 128Gb/s for SSDs
- Realtek 2.5Gb/s LAN controller provides up to 2.5× higher throughput than Gigabit Ethernet
- Expanded USB connectivity with a USB 3.2 Gen2x2 Type-C port reaching speeds of 20Gb/s
- Dual graphics outputs: HDMI 2.1 and DisplayPort 1.4 supporting resolutions up to 8K at 60Hz
Powerful performance and modern memory support
The 10+1+1+1+1 phase power subsystem with Dr.MOS circuits provides a stable power supply to all processor components. A six-layer PCB design minimises energy loss during overclocking. Intel XMP 3.0 support enables overclocking of four DDR5 modules up to 8666MHz, with a maximum capacity of 256GB. The board supports both standard DDR5 and CUDIMM modules. Aluminium heatsinks efficiently dissipate heat from the power circuits.
Expanded storage and high-speed connectivity
The storage subsystem offers three M.2 slots. The M2_1 slot with PCIe Gen5 x4 reaches speeds of 128Gb/s, while the M2_2 and M2_3 slots operate on PCIe Gen4 x4 at 64Gb/s. Four SATA connectors support RAID 0, 1, 5, and 10 configurations. The Realtek 2.5Gb/s network controller provides 2.5× higher throughput than Gigabit Ethernet. USB connectivity includes one USB 3.2 Gen2x2 Type-C at 20Gb/s, three USB 3.2 Gen1 ports on the rear panel, two on the front, and six USB 2.0 ports.
Graphics and expandability
The board features a steel-reinforced PCIe 5.0 x16 slot and a PCIe 4.0 x4 slot. The HDMI 2.1 graphics output supports 4K at 120Hz, while the DisplayPort 1.4 enables resolutions up to 8K at 60Hz. A seven-channel Realtek ALC897 audio codec ensures high-quality sound. The BIOS Flashback feature simplifies firmware updates. RGB lighting can be synchronised using ASRock Polychrome SYNC or SignalRGB.
Port selection
Storage
- Number of SATA III: 4
- Number of M.2: 3
- M.2 Slot 1 – M.2 PCI-E NVMe Gen5
- 2× M.2 Slot 2 – M.2 PCI-E NVMe Gen4
- Features: RAID 0, RAID 1, RAID 5, RAID 10
USB ports
- Internal USB 2.0: 2
- Internal USB 3.2 Gen 1: 1
- Internal USB-C 3.2 Gen 1: 1
- Rear USB 2.0: 2
- Rear USB 3.2 Gen 1: 3
- Rear USB-C 3.2 Gen 2x2: 1
Graphics
- DisplayPort 1.4
- HDMI 2.1
- Graphics outputs: DisplayPort, HDMI
Sound
- Number of channels: 7.1
- Rear connectors: 3× 3.5mm (Line in, Front Speaker, Microphone)
Other
- Rear: BIOS Flashback button, RJ-45 (LAN) 2.5Gb/s
- Power: 24-pin, 8-pin, 4-pin
- Cooling: number of PWM FAN (4-pin) - 6
- Internal: COM header, TPM header, RGB LED header (4-pin), 3× Addressable LED header
Choosing a motherboard
When choosing a motherboard (also known as a mainboard), it's important to pay particular attention to the motherboard's socket type, format, and chipset. These are among the most crucial parameters, ensuring the board is compatible with the processor, expansion cards, and other components. The specific socket determines your choice of processor, while the remaining connectors dictate which other components you'll need for your future computer.Specifications
Format & functions
Memory
Advanced parameters
Connectors
Compatibility
Colour
This product is not an independently functional unit and may require professional installation.
Specifications can be changed without notice. Images are for illustrative purposes only.
