This article covers ASUS Intel Core Ultra Processors Series 2 LGA1851対応 B860 ATXマザーボード.

Overview

The ASUS PRIME B860-PLUS-CSM is an ATX motherboard built around the Intel B860 chipset, featuring the LGA1851 socket for Intel Core Ultra processors (Series 2). It supports DDR5 memory up to 8666+ MT/s (OC) and includes a PCIe 5.0 x16 slot for the latest graphics cards. This board targets the mid-range market, offering a balanced mix of stability, expandability, and affordability. With ASUS's robust power delivery and thermal design, it's well-suited for both gaming and productivity builds.

Compatibility Guide

This motherboard exclusively supports Intel Core Ultra processors (Series 2) on the LGA1851 socket. Memory support is limited to DDR5, with four DIMM slots accommodating up to 256GB and speeds reaching 8666+ MT/s when overclocked. Expansion includes one PCIe 5.0 x16 slot, three M.2 slots (one Gen5, two Gen4), and four SATA 6Gb/s ports. The ATX form factor (30.5cm x 24.4cm) fits standard ATX cases. Power delivery uses a 24-pin main connector plus two 8-pin CPU power connectors; a 650W or higher PSU is recommended for a typical build with a discrete GPU.

Product Info

Released in early 2025, the ASUS PRIME B860-PLUS-CSM is a mid-range motherboard that sits below the Z890 flagship series. It omits CPU overclocking but retains essential features like PCIe 5.0, DDR5 support, and a 2.5Gb Ethernet port. The retail price hovers around ¥26,000–¥28,000, making it a cost-effective choice for Core Ultra builds. ASUS provides a standard 3-year warranty, and the board is widely available through major retailers and e-tailers.

Best Use Cases

Mid-range gaming PC builder: Pair this board with a Core Ultra 5 or Core Ultra 7 and a mid-tier GPU (e.g., RTX 4060 or RX 7600) for smooth 1440p gaming. The PCIe 5.0 slot ensures future GPU upgrades are supported. Content creator on a budget: With support for up to 256GB of DDR5 memory and a Gen5 M.2 slot, this board handles video editing, 3D rendering, and large dataset work without breaking the bank. Stability-focused user: If you don't need CPU overclocking and prioritize system reliability, the PRIME series' proven power stage and thermal design deliver consistent performance under load. Office or home server: The four SATA ports and multiple M.2 slots provide ample storage for file servers or multi-boot setups, while the 2.5Gb LAN ensures fast network transfers. ## Alternatives
Direct competitors in the same price bracket include the MSI B860 GAMING PLUS WIFI and the GIGABYTE B860 AORUS ELITE. The MSI board comes with built-in Wi-Fi 6E, which is a plus for users who need wireless connectivity. The GIGABYTE model offers more VRM phases, potentially better for heavy overclocking (though B860 limits CPU OC). The ASUS PRIME B860-PLUS-CSM counters with ProCool II power connectors, an 8-layer PCB for improved signal integrity, and ASUS's user-friendly UEFI BIOS. If you don't need Wi-Fi and value a stable, well-supported platform, the ASUS board is a strong pick.

Things to Consider

This motherboard is strictly for Intel Core Ultra (Series 2) LGA1851 CPUs; it is not backward-compatible with LGA1700 processors (12th–14th Gen). Since B860 does not support CPU overclocking, enthusiasts aiming to push a Core Ultra 9 to its limits should look at Z890 boards instead. The M.2 Gen5 slot is limited to one; if you need multiple Gen5 SSDs, consider a higher-tier chipset. Additionally, the board lacks built-in Wi-Fi, so you'll need to add a Wi-Fi card or use a USB adapter if wireless connectivity is required. ## FAQ Q: Can I use a Core Ultra 5 225H with this motherboard? A: No. The PRIME B860-PLUS-CSM supports only desktop Core Ultra processors (Series 2) with the LGA1851 socket. Mobile H-series CPUs like the 225H use a different package and are not compatible. Q: Does this board support PCIe 5.0 graphics cards? A: Yes, it has one PCIe 5.0 x16 slot, so modern GPUs like the GeForce RTX 50 series or Radeon RX 9000 series will work at full bandwidth. Q: Can I install DDR4 memory? A: No, this motherboard only supports DDR5 memory. DDR4 modules are physically incompatible and cannot be inserted.

Product Disclosure (Amazon)

  • Manufacturer: ASUS
  • Seller: Tタウンマーケット 豊橋支店
  • Fulfilled by: Tタウンマーケット 豊橋支店
  • ASIN: B0DNKM3NVQ
  • Note: This article covers a manufacturer-made product based on Amazon listing details.