– Overview

 ASUS Prime B860M-A CSM is a powerful and reliable Micro-ATX motherboard designed for the latest Intel Core Ultra processors. Built on the Intel B860 chipset with the LGA 1851 socket, it delivers excellent stability, next-generation connectivity, and strong expansion options — making it ideal for gaming PCs, workstations, and modern productivity builds.

– Key Features

– CPU & Platform

• Supports Intel Core Ultra Series processors

• Socket: LGA 1851

• Chipset: Intel B860

• Designed for long-term stability and enterprise reliability from the CSM series

– Memory (RAM)

• 4 × DDR5 DIMM slots

• Supports up to 256GB DDR5

• Dual-channel architecture

• Supports memory overclocking (AEMP III / XMP)

– Expansion & Graphics

• 1 × PCIe 5.0 x16 slot for next-gen GPUs

• 1 × PCIe 4.0 x16 (x4 mode)

• 1 × PCIe 4.0 x1

• Perfect compatibility for high-end graphics cards and future upgrades

– Storage Options

• 2 × M.2 NVMe slots:

  • M.2_1: PCIe 5.0 x4 (ultra-fast SSD support)

  • M.2_2: PCIe 4.0 x4

• 4 × SATA 6Gb/s ports

• Supports RAID 0 / 1 / 5 / 10

– Connectivity & Ports

• USB-C 20Gbps (rear)

• USB-A 10Gbps + USB 5Gbps ports

• Internal USB-C header for modern cases

• 2.5Gb Ethernet LAN with enhanced protection

• Display outputs (if CPU has iGPU):

  • HDMI

  • DisplayPort

– Cooling & Build Quality

• Enhanced VRM power design suitable for high-performance CPUs

• Large heatsinks for stable thermal performance

• Several fan headers + AIO pump support

• ASUS Fan Xpert for smart cooling control

• Pre-mounted I/O shield for clean and easy installation

– Ideal For

• High-performance gaming PCs

• Professional content creation and editing

• Future-proof mid-range and high-end builds

• Compact but powerful Micro-ATX systems

– Why It’s a Great Choice

• Supports the newest Intel platform

• PCIe 5.0 for next-gen GPUs and SSDs

• Extremely fast DDR5 support

• Dual M.2 with Gen 5 compatibility

• Strong cooling and power delivery

• Perfect balance of performance and price