ASRock B850I Lightning WiFi

The B850I Lightning WiFi is ASRock's mainstream B850 Mini-ITX board, built on an 8-layer PCB with a disclosed 110A SPS VRM, positioned between the premium PG-ITX and budget Lightning B650 offerings in ASRock's ITX lineup.

A 10+1+1 phase design using 110A SPS stages for VCore gives this board solid disclosed power delivery for current Ryzen 9000/8000/7000 chips at stock or light overclocks. Two DDR5 DIMM slots support up to 128GB total capacity, with AMD EXPO enabling speeds of 8200+ MT/s depending on CPU generation and memory kit. A single PCIe 5.0 x16 slot (generation depends on installed CPU) handles the GPU, and two M.2 slots cover storage: one PCIe 5.0 x4 and one PCIe 4.0 x4. A Killer-branded 2.5GbE controller pairs with Wi-Fi 6E and Bluetooth. Audio uses a Realtek ALC1220 codec. Notably, this board does not include USB4 unless paired with a Ryzen 8000G-series APU, per independent testing, since USB4 on AM5 boards typically requires APU-side controller support. Against the ASRock B650E PG-ITX WiFi in this catalog, the B850I Lightning WiFi drops the 10-layer PCB and higher phase count in exchange for a lower price while staying on the newer B850 chipset.