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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

  • CPU Socket TypeLGA 1851
  • CPU TypeIntel Core Ultra Processors (Series 2)
  • ChipsetIntel B860
  • Number of Memory Slots4x288pin (DDR5)
  • Memory StandardUp to DDR5 8666+(OC)
  • Maximum Memory Supported256GB

Option B860M Pro-A WiFi

Struck-through versions exist but are not stocked here.

  • 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.

Highlights

  • 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

Specifications

BrandASRock
ModelB860M Pro-A WiFi
Part NumberB860M Pro-A WiFi
CPU Socket TypeLGA 1851
CPU TypeIntel Core Ultra Processors (Series 2)
ChipsetIntel B860
Number of Memory Slots4x288pin (DDR5)
Memory StandardUp to DDR5 8666+(OC)
Maximum Memory Supported256GB
Channel SupportedDual Channel
Memory Performance ProfileIntel XMP 3.0
Memory FeatureSupports DDR5 non-ECC, un-buffered memory up to 8666+(OC)*
Supports Clocked Unbuffered DIMM (CUDIMM)
PCI Express 5.0 x16CPU:
- 1 x PCIe 5.0 x16 Slot (PCIE1), supports x16 mode*
PCI Express x4Chipset:
- 1 x PCIe 4.0 x4 Slot (PCIE2), supports x4 mode*
* Supports NVMe SSD as boot disks
Serial ATA (SATA)4 x SATA 6Gb/s
M.2CPU:
- 1 x Blazing M.2 Socket (M2_1, Key M), supports type 2280 PCIe Gen5x4 (128 Gb/s) mode*
Chipset:
- 1 x Hyper M.2 Socket (M2_2, Key M), supports type 2230/2242/2260/2280 PCIe Gen4x4 (64 Gb/s) mode*
- 1 x Hyper M.2 Socket (M2_3, Key M), supports type 2280 PCIe Gen4x4 (64 Gb/s) mode*
* Supports Intel Volume Management Device (VMD)
Supports NVMe SSD as boot disks
SATA RAIDSupports RAID 0, RAID 1, RAID 5 and RAID 10 for SATA storage devices
Audio ChipsetRealtek ALC897
Audio Channels7.1 Channels
LAN ChipsetDragon RTL8125BG
Max LAN Speed2.5Gbps
Back I/O Ports2 x Antenna Ports
1 x HDMI Port
1 x DisplayPort 1.4
1 x USB 3.2 Gen2x2 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 USB2 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
Other Connectors1 x SPI TPM Header
1 x Power LED and Speaker Header
1 x RGB LED Header*
3 x Addressable LED Headers**
2 x CPU Fan Connector (4-pin) (Smart Fan Speed Control)***
3 x Chassis Fan Connectors (4-pin) (Smart Fan Speed Control)***
1 x AIO Pump Fan Connector (4-pin) (Smart Fan Speed Control)***
1 x Front Panel Audio Connector
* Supports in total up to 12V/3A, 36W LED Strip
** Support in total up to 5V/3A, 15W LED Strip
*** CPU_FAN1 supports the fan power up to 1A (12W).
CPU_FAN2, CHA_FAN1~3 and AIO_PUMP support the fan power up to 3A (36W).
CPU_FAN2, CHA_FAN1~3 and AIO_PUMP can auto detect
BIOS Feature256Mb AMI UEFI Legal BIOS with GUI support
SoftwareSoftware
- ASRock Motherboard Utility (A-Tuning)
- ASRock Dragon 2.5G LAN Software
- ASRock Polychrome SYNC
UEFI
- ASRock EZ Mode
- ASRock Full HD UEFI
- ASRock My Favorites in UEFI
- ASRock Auto Driver Installer
- ASRock Instant Flash
Windows 11Windows 11 64-bit
Form FactorMicro ATX
Dimensions (W x L)9.6" x 9.6"
Power Pin1 x 24 pin ATX Power Connector
1 x 8 pin 12V Power Connector (Hi-Density Power Connector)
1 x 4 pin 12V Power Connector (Hi-Density Power Connector)
FeaturesSuperb Productivity
- PCIe Gen5 (Graphics, M.2)
- Dual Channel DDR5
Rock-Solid Durability
- 10+1+1+1+1 Power Phase, Dr.MOS for VCore+GT+SA+VNNAON
Ultrafast Connectivity
- 2.5G LAN, 802.11axe Wi-Fi 6E Module
EZ Update
- BIOS Flashback Button
- ASRock Auto Driver Installer
EZ Troubleshooter
- ASRock Post Status Checker
Package Contents1 x I/O Shield
2 x SATA Data Cables
2 x ASRock WiFi 2.4/5/6 GHz Antennas
Shipping weight2.20 kg
Package size310 × 280 × 70 mm

Other versions of this model

5 more in the same range

Same family, different memory, cooler or clock — compare before you commit.

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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