ASRock B850I Lightning WiFi

Name: ASRock B850I Lightning WiFi
Brand: ASRock
SKU: 7086

Manufacturer: ASRock

The ASRock B850I Lightning WiFi is a compact Mini-ITX motherboard built around the AM5 socket and B850 chipset, making it a solid option for small-form-factor builds using current AMD processors. It ships with Wi-Fi 6E (802.11ax) and Bluetooth 5.2 integrated, along with RGB lighting and support for overclocking, all within a 170 mm × 170 mm footprint. A three-year warranty and dual BIOS round out its feature set for a board of this size.

Memory support extends to 128 GB of DDR5 across two slots in dual-channel configuration, with overclocked speeds reaching up to 8200 MHz. Storage options include two M.2 sockets, two SATA 3 connectors, and RAID 0, 1, and 10 support. Connectivity on the rear panel includes USB 3.2 Gen 2 ports in both USB-A and USB-C formats, four USB 2.0 ports, HDMI 2.1 output, and a single RJ45 port. The board carries a single PCIe 5.0 x16 slot for the primary graphics card, while audio is handled by a 7.1-channel solution with a 120 dB signal-to-noise ratio and S/PDIF output.

Pros

Supports Wi-Fi 6E alongside older Wi-Fi standards, covering a wide range of wireless network compatibility
Dual BIOS provides a built-in fallback in case of a failed BIOS update or corruption
DDR5 memory support with overclocked speeds up to 8200 MHz and a 128 GB capacity ceiling across two slots
A single PCIe 5.0 x16 slot ensures the primary GPU has access to the latest and fastest expansion interface available
7.1-channel audio with a 120 dB signal-to-noise ratio and S/PDIF output is a strong onboard audio implementation for a Mini-ITX board
Three-year warranty offers a solid coverage period for a compact motherboard

Cons

Only two SATA 3 connectors and two M.2 sockets limit storage expansion options within the Mini-ITX footprint
No TPM connector is present, which may be a drawback for users requiring hardware-based security modules
RAID 5 and RAID 0+1 are not supported, restricting advanced storage redundancy configurations
No easy CMOS reset functionality, which can complicate BIOS recovery in certain situations
With only three fan headers, thermal management options are limited for more demanding cooling setups
No USB 4, Thunderbolt 3, or Thunderbolt 4 ports are available, leaving high-bandwidth peripheral connectivity options restricted

Who is this for?

This board is well-suited to builders working within a compact Mini-ITX form factor who want access to current-generation AM5 platform features without sacrificing connectivity. Users putting together a small-form-factor desktop with a modern AMD processor will benefit from the PCIe 5.0 x16 slot, DDR5 support with speeds up to 8200 MHz, and Wi-Fi 6E for fast wireless networking. It also works well for those who value onboard audio quality, given the 7.1-channel output and 120 dB signal-to-noise ratio, as well as users who want the reassurance of dual BIOS and a three-year warranty in a system that may be difficult to service frequently due to its size.

Who is this NOT for?

This board is not a good fit for users who need extensive storage expansion, as the combination of only two M.2 sockets and two SATA 3 connectors leaves little room for multi-drive configurations. It is also ill-suited to workstation or server use cases that depend on ECC memory support or advanced RAID configurations such as RAID 5, which are not available here. Additionally, users who rely on high-bandwidth peripheral connections — such as those requiring Thunderbolt 4 or USB 4 — will find this board lacking, making it a poor match for workflows involving fast external storage arrays or high-speed docking solutions.

General info:

CPU socket	AM5
chipset	B850
form factor	Mini-ITX
supports Wi-Fi	✓
Wi-Fi version	Wi-Fi 4 (802.11n), Wi-Fi 5 (802.11ac), Wi-Fi 6 (802.11ax), Wi-Fi 6E (802.11ax)
Has Bluetooth	✓
Bluetooth version	5.2
HDMI version	HDMI 2.1
Easy to overclock	✓
has RGB lighting	✓
Easy to reset BIOS	✕
Has dual BIOS	✓
has aptX	✕
CPU sockets	1
Has integrated graphics	✕
warranty period	3 years
height	170 mm
width	170 mm
Has integrated CPU	✕

The ASRock B850I Lightning WiFi is built around the AM5 socket with a B850 chipset and adopts the compact Mini-ITX form factor, measuring 170 mm × 170 mm. It supports a single CPU and has no integrated processor or integrated graphics. Wireless connectivity is handled by a built-in module covering Wi-Fi 4, 5, 6, and Wi-Fi 6E, paired with Bluetooth 5.2, though aptX audio streaming is not supported. Video output is available via an HDMI 2.1 port. The board features RGB lighting, supports overclocking, and includes dual BIOS for added reliability, although easy CMOS reset is not available. A three-year warranty is included.

Memory:

maximum memory amount	128GB
overclocked RAM speed	8200 MHz
memory slots	2
DDR memory version	5
memory channels	2
Supports ECC memory	✕

This board supports DDR5 memory across two slots in a dual-channel configuration, with a maximum capacity of 128 GB. Overclocked RAM speeds can reach up to 8200 MHz, offering headroom for performance-oriented memory kits. ECC memory is not supported.

Ports:

USB 3.2 Gen 2 ports (USB-A)	2
USB 3.2 Gen 1 ports (USB-A)	1
USB 3.2 Gen 2 ports (USB-C)	1
USB 3.2 Gen 1 ports (USB-C)	0
USB 2.0 ports	4
USB 3.2 Gen 2x2 ports	0
USB 4 40Gbps ports	0
USB 4 20Gbps ports	0
Thunderbolt 4 ports	0
Thunderbolt 3 ports	0
has an HDMI output	✓
DisplayPort outputs	0
RJ45 ports	1
Has USB Type-C	✓
eSATA ports	0
DVI outputs	0
has a VGA connector	✕
PS/2 ports	0

The rear I/O panel includes a total of eight USB ports: two USB 3.2 Gen 2 USB-A ports, one USB 3.2 Gen 1 USB-A port, one USB 3.2 Gen 2 USB-C port, and four USB 2.0 ports. There is no USB 3.2 Gen 2x2, USB 4, Thunderbolt 3, or Thunderbolt 4 connectivity. Video output is handled by a single HDMI port, with no DisplayPort, DVI, or VGA outputs present. Networking is covered by one RJ45 port, and there are no eSATA or PS/2 ports included.

Connectors:

USB 3.2 Gen 1 ports (through expansion)	2
USB 2.0 ports (through expansion)	2
SATA 3 connectors	2
fan headers	3
USB 3.0 ports (through expansion)	2
M.2 sockets	2
Has TPM connector	✕
U.2 sockets	0
Has mSATA connector	✕
SATA 2 connectors	0

For storage, the board provides two M.2 sockets and two SATA 3 connectors, while SATA 2, U.2, and mSATA connectivity are absent. Internal expansion headers include two USB 3.2 Gen 1 ports, two additional USB 3.0 ports, and two USB 2.0 ports, all accessible through expansion. Cooling is supported by three fan headers. There is no TPM connector on this board.

Expansion slots:

PCIe 4.0 x16 slots	0
PCIe 5.0 x16 slots	1
PCIe 3.0 x16 slots	0
PCIe x1 slots	0
PCI slots	0
PCIe 2.0 x16 slots	0
PCIe x4 slots	0
PCIe x8 slots	0

The board offers a single PCIe 5.0 x16 slot as its only expansion option, intended for a primary graphics card or other full-length PCIe device. There are no PCIe 4.0, 3.0, 2.0, x8, x4, or x1 slots, and no legacy PCI slots, which is consistent with the space constraints of the Mini-ITX form factor.

Audio:

Signal-to-Noise ratio (DAC)	120 dB
audio channels	7.1
Has S/PDIF Out port	✓
audio connectors	2

The onboard audio solution supports 7.1-channel output and delivers a signal-to-noise ratio of 120 dB from the DAC, alongside two analog audio connectors on the rear panel. Digital audio output is also available through an S/PDIF Out port.

Storage:

Supports RAID 1	✓
Supports RAID 10 (1+0)	✓
Supports RAID 5	✕
Supports RAID 0	✓
Supports RAID 0+1	✕

The board supports RAID 0, RAID 1, and RAID 10 configurations, covering common setups for both performance and redundancy. RAID 5 and RAID 0+1 are not supported.

Final Verdict

The ASRock B850I Lightning WiFi delivers a capable and well-rounded AM5 platform in a compact Mini-ITX footprint, making it a strong choice for builders who want modern features without the bulk of a larger board. Its PCIe 5.0 x16 slot combined with DDR5 support and Wi-Fi 6E connectivity ensures the platform remains relevant for current and near-future hardware, while dual BIOS and a three-year warranty add a layer of reliability that is particularly appreciated in small-form-factor systems. The trade-offs — limited storage expansion, no ECC support, and the absence of high-bandwidth Thunderbolt or USB 4 ports — are largely inherent to the form factor and intended use case rather than oversights. For users building a compact desktop around a current AMD processor who prioritize wireless performance, solid audio, and forward-looking expansion, this board covers the essentials confidently.