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ATX motherboard with silver and black heatsinks, four DDR5 slots, PCIe 5.0 and 4.0 slots, multiple M.2 heatsinks, rear I/O with HDMI

ASRock

ASRock B860 Steel Legend WiFi Intel motherboard

SKU CH-Y7AY-GB2D5 MPN B860 Steel Legend WiFi

ATX board for Intel Core Ultra Series 2 with 14+1+1+1+1 phase 80A power, DDR5 8666, PCIe 5.0 x16, PCIe 4.0 x4 M.2, Realtek ALC1220 7.1 audio, Dragon RTL8125BG LAN, Wi-Fi, Thunderbolt 4

  • 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 B860 Steel Legend WiFi

Struck-through versions exist but are not stocked here.

  • Supports Intel Core Ultra Series 2 processors via LGA 1851 socket
  • 14+1+1+1+1 phase power design with 80A Dr.MOS for stable delivery
  • Four DDR5 slots up to 8666+(OC) with XMP 3.0 and 256GB max capacity
  • PCIe 5.0 x16 slot plus PCIe 4.0 x16 slot for graphics and expansion
  • Realtek ALC1220 7.1 CH HD Audio with Nahimic enhancement

Intel Core Ultra Series 2 platform

This ATX motherboard uses the Intel B860 chipset and LGA 1851 socket to support Intel Core Ultra processors (Series 2). A 14+1+1+1+1 phase power design with 80A Dr.MOS delivers stable current for the CPU cores graphics and system agent. Four DDR5 slots accept up to 256GB of non-ECC un-buffered memory running at 8666+(OC) with Intel XMP 3.0 and CUDIMM support.

Expansion layout and storage

The CPU provides one PCIe 5.0 x16 slot operating at x16 and one Blazing M.2 socket for a 2280 PCIe Gen5x4 drive at 128 Gb/s. The chipset adds a PCIe 4.0 x16 slot at x2 plus two Hyper M.2 sockets accepting 2230 2242 2260 or 2280 PCIe Gen4x4 drives at 64 Gb/s. Four SATA 6Gb/s ports support RAID 0 1 5 and 10 for additional arrays.

Rear I/O and audio

Graphics output includes one HDMI one DisplayPort and one Thunderbolt 4 Type-C connector. Dragon RTL8125BG LAN provides wired networking while Realtek ALC1220 codec with Nahimic Audio delivers 7.1 CH HD audio. These integrated interfaces reduce the need for add-in cards and free expansion slots for other devices.

Highlights

  • Supports Intel Core Ultra Series 2 processors via LGA 1851 socket
  • 14+1+1+1+1 phase power design with 80A Dr.MOS for stable delivery
  • Four DDR5 slots up to 8666+(OC) with XMP 3.0 and 256GB max capacity
  • PCIe 5.0 x16 slot plus PCIe 4.0 x16 slot for graphics and expansion
  • Realtek ALC1220 7.1 CH HD Audio with Nahimic enhancement

Specifications

BrandASRock
ModelB860 Steel Legend WiFi
Part NumberB860 Steel Legend 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 4.0 x16Chipset:
- 1 x PCIe 4.0 x16 Slot (PCIE2), supports x2 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*
- 1 x M.2 Socket (M2_4, Key M), supports type 2280 PCIe Gen4x2 (32 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 ALC1220
Audio Channels7.1 CH HD Audio with Content Protection
LAN ChipsetDragon RTL8125BG
Max LAN Speed2.5Gbps
Wireless LANWi-Fi 802.11 ax
BluetoothBluetooth 5.3
Back I/O Ports2 x Antenna Ports
1 x HDMI Port
1 x DisplayPort 1.4
1 x Optical SPDIF Out Port
1 x Thunderbolt 4 Type-C Port (40 Gb/s for USB4 protocol; 40Gb/s for Thunderbolt protocol)*
2 x USB 3.2 Gen2 Type-A Ports (10 Gb/s)
4 x USB 3.2 Gen1 Ports**
3 x USB 2.0 Ports
1 x RJ-45 LAN Port
1 x BIOS Flashback Button
1 x Line Out Jack (Gold Audio Jack)
1 x Microphone Input Jack (Gold Audio Jack)
* Supports USB PD 3.0 up to 5V@3A (15W) charging
** USB32_45 support Ultra USB Power.
Onboard USB2 x USB 2.0 Headers (Support 4 USB 2.0 ports)
2 x USB 3.2 Gen1 Headers (Support 4 USB 3.2 Gen1 ports)
1 x Front Panel Type C USB 3.2 Gen2x2 Header (20 Gb/s)
Other Connectors1 x Thermistor Cable Header
1 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)***
5 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_FAN1~5 and AIO_PUMP support the fan power up to 3A (36W).
CPU_FAN2, CHA_FAN1~5 a
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 FactorATX
Dimensions (W x L)12.0" x 9.6"
Power Pin1 x 24 pin ATX Power Connector
2 x 8 pin 12V Power Connectors (Hi-Density Power Connector)
FeaturesSuperb Productivity
- PCIe Gen5 (Graphics, M.2)
- Dual Channel DDR5
- Thunderbolt™ 4 Type-C Port (40 Gb/s)
Rock-Solid Durability
- 14+1+1+1+1 Power Phase, 80A Dr.MOS for VCore+GT+SA with Enlarged Heatsink Armor
- Flexible Integrated I/O Shield
- 20K Long-lasting Black Caps (high quality and conductive polymer capacitors)
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 Contents2 x SATA Data Cables
2 x ASRock WiFi 2.4/5/6 GHz Antennas
1 x Thermistor Cable
Shipping weight2.04 kg
Package size356 × 279 × 76 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

Does this board fit a standard ATX case and what CPU cooler clearance should I plan for?

The board follows the ATX form factor so it mounts in any standard ATX case; cooler clearance depends on the case and the 14+1+1+1+1 phase VRM heatsinks but most tower coolers fit without interference.

Which memory kits run at the advertised 8666 MT/s and do I need to enable a profile?

DDR5 non-ECC un-buffered DIMMs up to 8666+(OC) are supported; enable the Intel XMP 3.0 profile in BIOS to reach the rated speed on a compatible kit.

How many M.2 drives can I install and which slots share bandwidth with the graphics card?

Three M.2 sockets are provided: one CPU-attached Gen5 x4 slot for a 2280 drive and two chipset-attached Gen4 x4 slots supporting 2230, 2242, 2260 and 2280 drives; only the primary PCIe 5.0 x16 slot is wired to the CPU.

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