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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

  • CPU Socket TypeAM5
  • CPU TypeRyzen 7000 Series / Ryzen 8000 Series / Ryzen 9000 Series
  • ChipsetAMD B850
  • Number of Memory Slots2x288pin (DDR5)
  • Memory StandardUp to 8200+(OC)
  • Maximum Memory Supported128GB

Option 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.

Privalumai

  • 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

Specifikacijos

BrandASRock
ModelB850I Lightning WiFi
CPU Socket TypeAM5
CPU TypeRyzen 7000 Series / Ryzen 8000 Series / Ryzen 9000 Series
ChipsetAMD B850
Number of Memory Slots2x288pin (DDR5)
Memory StandardUp to 8200+(OC)
Maximum Memory Supported128GB
Channel SupportedDual Channel
Memory Performance ProfileAMD EXPO / Intel XMP 3.0
ECC SupportedYes
Buffer SupportedUn-buffered
PCI Express 4.0 x161 x PCIe 5.0 x16 Slot (PCIE1), supports x16 mode*
* PCIE1 will run at Gen5x16 with 9000 and 7000 series processors, Gen4x8 with 8000 (Phoenix 1) series processors and Gen4x4 with 8000 (Phoenix 2) series processors.
* Supports NVMe SSD as boot disks
Serial ATA (SATA)2 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 2280 PCIe Gen4x4 (64 Gb/s) mode*
- 2 x SATA3 6.0 Gb/s Connectors
* M2_1 is the first priority for M.2 installation.
* M2_1 will run at Gen5x4 with 9000 and 7000 series processors and Gen4x4 with 8000 (Phoenix 1 and Phoenix 2) series processors.
* Supports NVMe SSD as boot disks
SATA RAIDSupports RAID 0 and RAID 1 for SATA storage devices
Supports RAID 0, RAID 1 and RAID 10 for M.2 NVMe storage devices*
* Requires additional M.2 NVMe expansion cards to support RAID 10
Audio ChipsetRealtek ALC1220
Audio Channels7.1 Channels
LAN ChipsetKiller E3100G
Max LAN Speed2.5Gbps
Wireless LANWi-Fi 802.11 ax
BluetoothBluetooth 5.2
Back I/O Ports2 x Antenna Ports
1 x HDMI Port
1 x Optical SPDIF Out Port
2 x USB 3.2 Gen 2 Type-A Ports (10 Gb/s)*
1 x USB 3.2 Gen 2 Type-C Port (10 Gb/s) (DP-alt mode supports DP1.4a.)**
1 x USB 3.2 Gen 1 Port*
4 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)
* USB32_23 are Lightning Gaming Ports.
** USB32_TC1 supports a maximum speed of 40 Gb/s as a USB4 port with the 8000 (Phoenix 1 and Phoenix 2) series processors.
Onboard USB1 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
Other Connectors1 x Thermistor Cable Header
2 x Addressable LED Headers*
1 x CPU Fan Connector (4-pin) (Smart Fan Speed Control)**
1 x Chassis Fan Connector (4-pin) (Smart Fan Speed Control)**
1 x AIO Pump Fan Connector (4-pin) (Smart Fan Speed Control)**
1 x Front Panel Audio Connector
* Support in total up to 5V/3A, 15W LED Strip
** CPU_FAN1, CHA_FAN1 and AIO_PUMP support the fan power up to 3A (36W).
** CPU_FAN1, CHA_FAN1 and AIO_PUMP can auto detect if 3-pin or 4-pin fan is in use.
Form FactorMini ITX
Dimensions (W x L)6.7" x 6.7"
Power Pin1 x 24 pin ATX Power Connector
1 x 8 pin 12V Power Connector (Hi-Density Power Connector)
BIOS Feature256Mb AMI UEFI Legal BIOS with GUI support
SoftwareSoftware
- ASRock Motherboard Utility (Phantom Gaming Tuning)
- Killer Control Center
- ASRock Polychrome SYNC
* These utilities can be downloaded from ASRock Live Update & APP Shop.
UEFI
- ASRock EZ Mode
- ASRock Full HD UEFI
- ASRock Auto Driver Installer
- ASRock Instant Flash
Windows 11Windows OS 10 64-bit / 11 64-bit
FeaturesSuperb Productivity
- PCIe Gen5 (Graphics, M.2)
- Dual Channel DDR5
Rock-Solid Durability
- 10+1+1 Power Phase, 110A SPS for VCore with Enlarged Heatsink Armor
- Flexible Integrated I/O Shield
Ultrafast Gaming
- Killer 2.5G LAN, 802.11axe Wi-Fi 6E Module
- ASRock Lightning Gaming Ports
EZ Update
- BIOS Flashback Button
- ASRock Auto Driver Installer
Package Contents2 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
Siuntos svoris1.36 kg
Pakuotės dydis292 × 254 × 64 mm

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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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