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Product Overview

The ASRock B850I Lightning WiFi is a Mini-ITX motherboard built on the AMD B850 chipset for AM5 processors. Measuring just 170 x 170 mm, it carries two DDR5 slots for up to 128 GB of memory, a PCIe 5.0 x16 slot, two M.2 slots and a Realtek ALC1220 audio codec, plus a Killer E3100G 2.5 Gigabit LAN port and Wi-Fi 6E.

This board suits compact AM5 builds where you still want fast networking and modern connectivity. The rear I/O offers one USB-C 3.2 Gen 2 port, two USB-A 3.2 Gen 2 ports, HDMI for CPUs with integrated graphics and an optical S/PDIF output, with two SATA ports and three 4-pin PWM fan headers on the board. It supports Ryzen 7000, 8000 and 9000 series CPUs, including X3D models, though a BIOS update may be needed for the newest processors.

Specification

• Manufacturer: Asrock
• Model: B850I Lightning WiFi
• MPN: 90-MXBQR0-A0UAYZ
• EAN: 4711581490130
• Form factor: Mini-ITX
• CPU socket: AM5
• Chipset: AMD B850
• Memory: 2x DDR5 slots, up to 128 GB, dual channel, up to DDR5-8200+, ECC supported
• Expansion slots: 1x PCIe 5.0 x16
• Storage: 2x M.2, 2x SATA3
• Networking: Killer E3100G 2.5 Gigabit LAN, Wi-Fi 6E, Bluetooth 5.2
• Audio: Realtek ALC1220, 8-channel
• Rear USB: 1x USB-C 3.2 Gen 2, 2x USB-A 3.2 Gen 2, 1x USB-A 3.2 Gen 1, 4x USB-A 2.0
• Video output: 1x HDMI (requires CPU with integrated graphics)
• Other rear I/O: Microphone, Line-Out, optical S/PDIF-Out, RJ-45
• Fan and RGB headers: 3x 4-pin PWM fan, 2x addressable RGB
• RAID: 0, 1, 10
• Power connectors: ATX12V (24-pin + 8-pin)
• Dimensions (W x H): 170 x 170 mm

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