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Compact Mini ITX motherboard with black PCB, angular heatsinks and rear I/O shield

ASRock

ASRock B850I Lightning WiFi AMD motherboard

SKU CH-KEW7-NMM57 MPN B850I Lightning WiFi

AM5 Mini-ITX board with 10+1+1 phase power, one PCIe 5.0 x16 slot, dual DDR5 up to 8200, Gen5 and Gen4 M.2, 2.5 GbE LAN and 7.1 audio

  • ProcessorRyzen 7000 Series / Ryzen 8000 Series / Ryzen 9000 Series
  • ChipsetAMD B850
  • Form factorMini ITX
  • CPU socketAM5
  • Memory slot count2 × 288pin (DDR5)
  • Supported memoryUp to 8200+(OC)

Model B850I Lightning WiFi

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  • AM5 socket supports Ryzen 7000, 8000 and 9000 series CPUs
  • 10+1+1 phase VRM with 110A SPS delivers stable overclocking power
  • Dual DDR5 slots up to 8200 MT/s and 128GB capacity
  • PCIe 5.0 x16 slot plus Gen5 and Gen4 M.2 sockets
  • 5Gbps Killer LAN plus 7.1 Realtek ALC1220 audio

Socket AM5 Mini ITX platform

The ASRock B850I Lightning WiFi fits AMD Ryzen 7000, 8000 and 9000 series processors into a Mini ITX footprint. The B850 chipset provides a 10+1+1 phase power design rated at 110A SPS for the VCore. Two 288-pin DDR5 slots support up to 128GB at 8200+ MT/s with AMD EXPO and Intel XMP 3.0 profiles.

Builders needing compact high-speed I/O

This board suits small-form-factor systems that require a PCIe 5.0 x16 slot running at Gen5 with 7000 and 9000 series CPUs, plus a CPU-attached Blazing M.2 2280 socket at Gen5x4. The single x16 slot and two DIMM slots limit multi-GPU or quad-channel memory builds, so users needing those configurations should look at ATX alternatives.

Integrated connectivity and audio

Rear I/O includes a 2.5Gbps Killer E3100G LAN port, one USB 3.2 Gen2 Type-C, two USB 3.2 Gen2 Type-A, one HDMI and one USB Type-C with DP-Alt graphics output. Four rear USB 2.0 ports and front-panel headers for USB 3.2 Gen1 Type-C, two USB 3.2 Gen1 and two USB 2.0 complete the USB complement. Realtek ALC1220 drives 7.1-channel audio with Nahimic software enhancement.

How it compares

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

Price $158.99
Cheaper than about 60% of the 1,906 comparable items (median $224.49).

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Specifications

Product
Brand nameASRock
Model nameB850I Lightning WiFi
Processor
ProcessorRyzen 7000 Series / Ryzen 8000 Series / Ryzen 9000 Series
CPU socketAM5
ChipsetAMD B850
Memory
Memory slot count2 × 288pin (DDR5)
Supported memoryUp to 8200+(OC)
Max supported RAM128 GB
Memory channelsDual Channel
Memory profilesAMD EXPO / Intel XMP 3.0
ECC supportYes
BufferingUn-buffered
Storage
SATA ports2 x SATA 6Gb/s
Audio & video
Audio chipRealtek ALC1220
Sound channels7.1 Channels
Connectivity
Ethernet controllerKiller E3100G
Maximum network speed2.5 Gbit/s
Wi-Fi standardWi-Fi 802.11 ax
Bluetooth support5.2
Ports & slots
Onboard USB headers1 x USB 2.0 Header (Supports 2 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
1 × 8 pin 12 V Power Connector (Hi-Density Power Connector)
Size & build
Form factorMini ITX
Width and length6.7 in × 6.7 in
Shipping weight1.36 kg
Package size292 × 254 × 64 mm
Compatibility
Windows 11 supportWindows OS 10 64-bit / 11 64-bit
In the box
In the box2 x SATA Data Cables
2 x ASRock WiFi 2.4/5/6 GHz Antennas
2 x Screws for M.2 Sockets
1 x Thermistor Cable
More details
BIOS256Mb AMI UEFI Legal BIOS with GUI support

Other versions of this model

5 more in the same range

Questions about this item

What DDR5 memory speed and capacity must I already have to reach the 8200+(OC) rating on this board?

Install two DDR5 DIMMs up to 128 GB total; the board runs dual-channel and supports AMD EXPO or Intel XMP 3.0 profiles up to 8200+(OC).

Will my Ryzen 7000 series CPU run the PCIe 5.0 x16 slot at full Gen5 x16 speed?

Yes, with a Ryzen 7000 or 9000 series processor the slot operates at Gen5 x16; 8000 series Phoenix 1 runs Gen4 x8 and Phoenix 2 runs Gen4 x4.

How do I confirm the 2.5 Gbps LAN and 7.1-channel audio are active after assembly?

Check Device Manager for the Killer E3100G 2.5 Gbps adapter and Realtek ALC1220 7.1 codec, then verify link speed and speaker configuration in their respective control panels.

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