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Green rectangular micro-ATX board with silver heatsinks and four black DDR5 slots

ASRock

ASRock B860M Pro-A WiFi Intel motherboard

SKU CH-BRBA-S33QV MPN B860M Pro-A WiFi

Micro-ATX board for Intel Core Ultra Series 2 with DDR5 up to 8666 MT/s, PCIe 5.0 x16, two M.2 slots, four SATA 6 Gb/s ports, 7.1-channel audio and Dragon RTL8125BG LAN

  • ProcessorIntel Core Ultra Processors (Series 2)
  • ChipsetIntel B860
  • Form factorMicro ATX
  • CPU socketLGA 1851
  • Memory slot count4 × 288pin (DDR5)
  • Supported memoryUp to DDR5 8666+(OC)

Model B860M Pro-A WiFi

  • Supports Intel Core Ultra Series 2 processors via LGA 1851 socket
  • Four DDR5 slots reach 8666+(OC) with XMP 3.0 and 256 GB capacity
  • PCIe 5.0 x16 plus PCIe 4.0 x4 for GPU and add-in cards
  • Dual M.2 slots with 128 Gb/s Gen5 and 64 Gb/s Gen4 speeds
  • 1-channel Realtek ALC897 audio and Dragon RTL8125BG LAN

Socket LGA 1851 for Intel Core Ultra Series 2

This micro ATX motherboard targets builders who want a compact platform for Intel Core Ultra processors. The B860 chipset unlocks current-generation performance in smaller cases. Four DDR5 slots support up to 256 GB of memory for demanding workloads.

Dual channel DDR5 up to 8666 MT/s with XMP 3.0

Memory runs in dual-channel mode and scales to 8666 MT/s when XMP 3.0 profiles are enabled. The board accepts non-ECC unbuffered DIMMs and clocked unbuffered DIMMs. Only two full-length expansion slots are provided: one PCIe 5.0 x16 from the CPU and one PCIe 4.0 x4 from the chipset.

Straightforward install

Installation follows the standard micro ATX pattern: mount the board, seat the CPU in the LGA 1851 socket, populate up to four DDR5 modules and add storage to the CPU-linked Gen5 M.2 or the chipset Gen4 M.2 sockets. Common issues include forgetting to enable XMP in BIOS for rated memory speeds and ensuring the cooler clears the 10+1+1+1+1 power phase heatsinks.

How it compares

Measured against everything we stock in Motherboards for Intel CPUs, at today’s prices. Recalculated every night.

Price $124.99
Pricier than about 63% of the 2,965 comparable items (median $97.99).

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Specifications

Product
Brand nameASRock
Model nameB860M Pro-A WiFi
Part numberB860M Pro-A WiFi
Processor
ProcessorIntel Core Ultra Processors (Series 2)
CPU socketLGA 1851
ChipsetIntel B860
Memory
Memory slot count4 × 288pin (DDR5)
Supported memoryUp to DDR5 8666+(OC)
Max supported RAM256 GB
Memory channelsDual Channel
Memory profilesIntel XMP 3.0
Storage
SATA ports4 x SATA 6Gb/s
M.2 slotsCPU:
- 1 x Blazing M.2 Socket (M2_1, Key M), supports type 2280 PCIe Gen5 × 4 (128 Gb/s) mode*
Chipset:
- 1 x Hyper M.2 Socket (M2_2, Key M), supports type 2230/2242/2260/2280 PCIe Gen4 × 4 (64 Gb/s) mode*
- 1 x Hyper M.2 Socket (M2_3, Key M), supports type 2280 PCIe Gen4 × 4 (64 Gb/s) mode*
* Supports Intel Volume Management Device (VMD)
Supports NVMe SSD as boot disks
SATA and RAID supportSupports RAID 0, RAID 1, RAID 5 and RAID 10 for SATA storage devices
Audio & video
Audio chipRealtek ALC897
Sound channels7.1 Channels
Connectivity
Ethernet controllerDragon RTL8125BG
Maximum network speed2.5 Gbit/s
Ports & slots
PCIe 5.0 x16 slotsCPU:
- 1 x PCIe 5.0 x16 Slot (PCIE1), supports x16 mode*
PCIe x4 slotsChipset:
- 1 x PCIe 4.0 x4 Slot (PCIE2), supports x4 mode*
* Supports NVMe SSD as boot disks
Rear panel ports2 x Antenna Ports
1 x HDMI Port
1 x DisplayPort 1.4
1 x USB 3.2 Gen2 × 2 Type-C Port (20 Gb/s)
3 x USB 3.2 Gen1 Ports
2 x USB 2.0 Ports
1 x RJ-45 LAN Port
1 x BIOS Flashback Button
HD Audio Jacks: Line in / Front Speaker / Microphone
Onboard USB headers2 x USB 2.0 Headers (Support 4 USB 2.0 ports)
1 x USB 3.2 Gen1 Header (Supports 2 USB 3.2 Gen1 port)
1 x Front Panel Type C USB 3.2 Gen1 Header
Power
Power connectors1 × 24 pin ATX Power Connector
1 × 8 pin 12 V Power Connector (Hi-Density Power Connector)
1 × 4 pin 12 V Power Connector (Hi-Density Power Connector)
Size & build
Form factorMicro ATX
Width and length9.6 in × 9.6 in
Shipping weight2.20 kg
Package size310 × 280 × 70 mm
Compatibility
Windows 11 support64-bit
In the box
In the box1 x I/O Shield
2 x SATA Data Cables
2 x ASRock WiFi 2.4/5/6 GHz Antennas
More details
BIOS256Mb AMI UEFI Legal BIOS with GUI support

Other versions of this model

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Questions about this item

Should I pick the CPU-linked Gen5 M.2 slot or one of the chipset Gen4 slots for my boot drive?

Use the CPU-linked M2_1 slot for a Gen5 NVMe boot drive — it runs at 128 Gb/s. The chipset M2_2 and M2_3 slots run at 64 Gb/s and are better for secondary storage.

What does the DDR5 8666+(OC) rating mean when I install memory in this board?

It is the maximum overclocked data rate the board can reach with XMP 3.0 modules. At stock speeds the memory will run at standard DDR5 frequencies; the 8666+ figure only applies when you enable an XMP profile in BIOS.

What bandwidth does the PCIe 5.0 x16 slot actually deliver to a graphics card?

The PCIE1 slot is wired for x16 electrical lanes from the CPU, giving a full PCIe 5.0 x16 link to the graphics card.

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