This article covers ASUS intel Core Ultra Processors (Series 2) Socket LGA1851 対応 B860 搭載 Mini-ITX マザーボード.

Overview

If you're looking to build a compact yet powerful gaming rig, the ASUS ROG STRIX B860-I GAMING WIFI deserves serious attention. This Mini-ITX motherboard packs Intel's B860 chipset and supports the latest Intel Core Ultra processors (Series 2, LGA1851 socket). It handles DDR5 memory up to 9066MT/s when overclocked and includes a PCIe 5.0 x16 slot, making it ready for next-gen graphics cards. This board is designed for users who want maximum performance in a small footprint. ASUS has loaded it with smart features like AI Cooling II and AI Networking II, plus robust connectivity including Thunderbolt 4 and Wi-Fi 7. It's equally suited for a space-efficient gaming PC or a compact workstation for creative professionals. In the B860 motherboard market, this is one of the most premium Mini-ITX options available. With a 10+1+2+1 VRM phase design, a 10-layer PCB, and full support for Thunderbolt 4, it goes far beyond what typical Mini-ITX boards offer. It sits in the high end of B860 boards, though it naturally lacks the PCIe lane count and overclocking headroom of a Z890 Mini-ITX counterpart.

Compatibility Guide

Socket: LGA1851, exclusively for Intel Core Ultra (Series 2) processors. Note that LGA1700 coolers are not mechanically compatible; you'll need a cooler with an LGA1851 mounting kit. Memory: Dual-channel DDR5, up to 96GB. Overclocking is supported up to 9066MT/s via AEMP III or XMP profiles. Stick to rated speeds if stability is your priority. Form factor: Mini-ITX (17×17 cm). Fits in any Mini-ITX case and some smaller Micro-ATX cases (double-check case dimensions). Watch out for CPU cooler height and GPU length limits of your chosen case. Expansion: One PCIe 5.0 x16 slot (x16 electrical). Two M.2 slots (one Gen5, one Gen4×4) and four SATA 6Gb/s ports provide flexible storage options. No secondary PCIe slots for capture cards or network adapters. * Power: 24-pin ATX and one 8-pin CPU power connector required. Recommended PSU wattage is 650W or higher; 750W+ is advisable when pairing with a high-end GPU.

Product Info

The ASUS ROG STRIX B860-I GAMING WIFI launched in early 2025, with a street price around ¥34,323 (). It comes with a standard 3-year manufacturer warranty. Sold through major PC parts retailers in Japan and international channels. This motherboard occupies the high-end tier of B860 Mini-ITX offerings. Its VRM (10+1+2+1 phases, 80A Dr.Mos), 10-layer PCB, and inclusion of Thunderbolt 4 and Wi-Fi 7 justify the premium over entry-level B860 boards. However, it cannot match the maximum memory overclocking or additional chipset PCIe lanes of Z890 boards.

Best Use Cases

Small-form-factor gaming PC Ideal for gamers who want a powerful but compact system. Pair it with an RTX 4070 (or similar) and a decent air cooler (e.g., Noctua NH-L12S) for a quiet, 1080p/1440p gaming machine. Avoid pairing with oversized triple-fan GPUs unless your case can accommodate them. ### Creative workstation in a compact desk setup Thunderbolt 4 makes this board a standout for creators. Connect a fast external SSD, a 4K monitor, and a docking station over a single cable. Wi-Fi 7 and 2.5Gb Ethernet ensure file transfers and cloud backups are speedy. The two M.2 slots (Gen5 + Gen4) are enough for a boot drive and a scratch disk. ### Long-term upgrade platform LGA1851 is new and likely to support at least one more CPU generation. With PCIe 5.0 and DDR5, you can reuse this board for several years, upgrading the GPU and CPU as needed. Great for builders who plan ahead.

Things to Consider

The most significant limitation is single-slot expansion: only one PCIe slot, so no dual GPU, no PCIe capture card, no additional NVMe adapter card. M.2 slots are limited to two as well — if you need more, you'll rely on SATA SSDs or risk using the PCIe slot for an M.2 expansion card. Cooler compatibility is another gotcha. LGA1851 requires coolers with specific mounting hardware. Many existing LGA1700 coolers can work if a retrofit kit is available, but don't assume compatibility without checking the manufacturer's website. Price-wise, this board costs more than similar B860 mATX/ATX options. The Mini-ITX premium is real, but the build quality, VRM, and feature set (Thunderbolt 4, Wi-Fi 7, AI features) justify it if you need a compact board. ## FAQ
Q: Can I use a Core Ultra 7 265K or Core Ultra 9 285K with this board? A: Yes, all Core Ultra (Series 2) processors are compatible. However, if you install a high-end model, ensure your case has adequate airflow over the VRM heatsink to prevent throttling. Q: Does this board support dual graphics cards? A: No. There is only one PCIe slot available. Single GPU only. Q: Do I need a BIOS update before using it? A: The board ships with a baseline BIOS that supports current CPUs. To ensure the best compatibility with memory and future processors, it's wise to update the

Product Disclosure (Amazon)

  • Manufacturer: ASUS
  • ASIN: B0CW11HVKL
  • Note: This article covers a manufacturer-made product based on Amazon listing details.