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ATX motherboard with black PCB, silver heatsinks and four DDR5 slots

ASRock

ASRock B860 Challenger WiFi Intel motherboard

SKU CH-6JD0-X6FRH MPN B860 Challenger WiFi

ATX board for Intel Core Ultra Series 2 CPUs with DDR5 up to 8666 MT/s, PCIe 5.0 x16, one Gen5 M.2, one Gen4 M.2, four SATA ports, Dragon RTL8125BG LAN and 7.1 audio

  • ProcessorIntel Core Ultra Processors (Series 2)
  • ChipsetIntel B860
  • Form factorATX
  • CPU socketLGA 1851
  • Memory slot count4 × 288pin (DDR5)
  • Supported memorySupports up to 8666+(OC)
  • Supports Intel Core Ultra Series 2 processors on LGA 1851 socket
  • DDR5 memory scales to 8666 MHz overclocked with XMP 3.0 profiles
  • Primary PCIe 5.0 x16 slot delivers 16 lanes for modern graphics cards
  • CPU-attached M.2 socket runs at Gen5 x4 for 128 Gb/s storage bandwidth
  • Four SATA 6 Gb/s ports with RAID 0, 1, 5, 10 support

Socket LGA 1851 ATX board

The ASRock B860 Challenger WiFi is an ATX motherboard built for Intel Core Ultra Processors (Series 2) on the LGA 1851 socket. It targets builders who want a full-size platform with modern connectivity and room for high-capacity memory. The Intel B860 chipset handles platform duties while the board delivers a standard ATX layout.

DDR5 memory ceiling

Four 288-pin DDR5 slots support up to 256GB in dual-channel mode with Intel XMP 3.0 profiles. Native speeds reach 5600 MHz; overclocked limits vary by population: 1DPC 1R hits 8666+ MHz, 1DPC 2R hits 6800+ MHz, 2DPC 1R hits 6533+ MHz, and 2DPC 2R hits 5600+ MHz. Clocked Unbuffered DIMM (CUDIMM) modules are supported.

PCIe 5.0 M.2 and x16 slot

A CPU-attached Blazing M.2 socket (M2_1) runs at PCIe Gen5x4 (128 Gb/s) for 2280 drives, while the chipset Hyper M.2 socket (M2_2) runs at Gen4x4 (64 Gb/s) for 2230/2242/2260/2280 drives. The primary PCIe 5.0 x16 slot operates at x16 mode; a second PCIe 4.0 x16 slot from the chipset operates at x4 mode. Four SATA 6Gb/s ports with RAID 0/1/5/10 complete the storage array.

How it compares

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

Price $110.99
Pricier than about 57% of the 2,965 comparable items (median $97.99).

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Specifications

Product
Brand nameASRock
Model nameB860 Challenger WiFi
Processor
ProcessorIntel Core Ultra Processors (Series 2)
CPU socketLGA 1851
ChipsetIntel B860
Memory
Memory slot count4 × 288pin (DDR5)
Supported memorySupports up to 8666+(OC)
Max supported RAM256 GB
Memory channelsDual Channel
Memory profilesIntel XMP 3.0
ECC supportNon-ECC
BufferingUn-buffered
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
Sound channels7.1 Channels
Connectivity
Ethernet controllerDragon RTL8125BG
Maximum network speed2.5 Gbit/s
Wi-Fi standardWi-Fi 802.11 be
Bluetooth support5.4
Ports & slots
PCIe 5.0 x16 slotsCPU:
- 1 x PCIe 5.0 x16 Slot (PCIE1), supports x16 mode
PCIe 4.0 x16 slotsChipset:
- 1 x PCIe 4.0 x16 Slot (PCIE2), supports x4 mode
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 ports)
1 x Front Panel Type C USB 3.2 Gen1 Header
Power
Power connectors1 × 24 pin ATX Power Connector
2 × 8 pin 12 V Power Connectors (Hi-Density Power Connector)
Size & build
Form factorATX
Width and length12.0 in × 9.6 in
Shipping weight1.86 kg
Package size356 × 279 × 76 mm
In the box
In the box2 x SATA Data Cables
2 x ASRock WiFi 2.4/5/6 GHz Antennas
1 x Screw for M.2 Socket
1 x Standoff for M.2 Socket
More details
BIOS256Mb AMI UEFI Legal BIOS with GUI support

Questions about this item

Should I populate two or four DDR5 slots to hit the highest memory speeds on this board?

With one DIMM per channel (1DPC 1R) the board reaches 8666 MHz overclocked and 5600 MHz native. Filling all four slots drops the ceiling to 5600 MHz overclocked and 4400 MHz native.

What does the 8666 MHz memory figure actually deliver once the system is built?

That speed is an overclocked ceiling for a single-rank kit in two slots. Real-world throughput depends on the memory kit, CPU memory controller and cooling; most stable daily configs run lower.

Which M.2 slot uses PCIe 5.0 and what bandwidth does it provide?

The CPU-connected Blazing M.2 socket (M2_1) runs Gen5 x4, delivering 128 Gb/s. The chipset Hyper M.2 sockets run Gen4 x4 at 64 Gb/s.

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