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

Overview

The ASUS PRIME B860M-A WIFI-CSM is a micro-ATX motherboard designed for Intel Core Ultra (Series 2) processors with the LGA1851 socket and Intel B860 chipset. It supports DDR5 memory overclocked up to 8400+ MT/s and includes a single PCIe 5.0 x16 slot for modern graphics cards. Networking is covered by integrated WiFi 6E and 2.5Gb Ethernet. Despite its mid-range B860 chipset, the board features an 8+1+1+1 phase Dr.MOS VRM with 80A per phase, ProCool II power connectors, and a six-layer PCB for stable power delivery. Additional highlights include a Thunderbolt 5 header, USB 20Gbps Type-C at the rear, and one M.2 Gen5 slot. This motherboard targets users who want the latest platform features at a reasonable price.

Compatibility Guide

The PRIME B860M-A WIFI-CSM only supports Intel Core Ultra (Series 2) CPUs with socket LGA1851. Memory is DDR5 only, with four slots supporting up to 192GB and overclocking above 8400 MT/s. The micro-ATX form factor (24.4×24.4 cm) fits most mATX cases. Expansion includes one PCIe 5.0 x16 slot, two M.2 slots (one Gen5, one Gen4), and four SATA 6G ports. Power connectors are the standard 24-pin ATX and an 8-pin EPS for the CPU. Rear I/O offers a USB 20Gbps Type-C, multiple USB 3.2 ports, and audio jacks. The LAN is Realtek 2.5GbE, while wireless is WiFi 6E with Bluetooth 5.3.

Product Info

Released in early 2025, this motherboard is available through authorized distributors in Japan. The price is around 19,000–20,000 JPY, placing it in the mid-range segment. ASUS provides a three-year warranty including pin damage coverage. In the market, the PRIME B860M-A sits firmly in the mid-tier. It lacks the full overclocking capabilities of Z890 boards but offers PCIe 5.0 support and excellent memory overclocking for the price.

Best Use Cases

This board is ideal for building a new PC with Intel Core Ultra (Series 2) without breaking the bank. It’s a great entry point into the LGA1851 platform. For compact gaming rigs using micro-ATX cases, the PCIe 5.0 slot and fast M.2 support ensure compatibility with next-generation GPUs and storage. Creative professionals who need Thunderbolt 5 connectivity for high-speed external drives or displays will appreciate the header, although a separate card is needed. ## Alternatives
Direct competitors include the GIGABYTE B860M AORUS ELITE WIFI6E and MSI MAG B860M MORTAR WIFI. The GIGABYTE board offers a similar feature set but lacks the ProCool II and Thunderbolt 5 header. The MSI board has a slightly stronger VRM but costs more. Your choice should depend on which extra features matter most.

Things to Consider

CPU overclocking is not supported due to the B860 chipset, though memory overclocking is fine. The single PCIe 5.0 x16 slot means no multi-GPU setups. Only one M.2 slot is Gen5; the second is Gen4. Thunderbolt 5 requires an add-in card (not included). CPU compatibility is strictly limited to Intel Core Ultra (Series 2), so check your processor before purchase. Overall, the PRIME B860M-A WIFI-CSM delivers solid mid-range performance and connectivity at a fair price.

Product Disclosure (Amazon)

  • Manufacturer: ASUS
  • Seller: Electric UNAGI
  • Fulfilled by: Electric UNAGI
  • ASIN: B0DQ66PD4L
  • Note: This article covers a manufacturer-made product based on Amazon listing details.