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ASUS PRIME B860M-A WIFI-CSM B860 LGA 1851 mATX motherboard, Intel® Core™ Ultra Series 2 Ready, Advanced AI PC-ready, 7+1+1+1 stage, DDR5, PCIe 5.0 x16, HDMI, USB 20Gbps Type-C®, 2x M.2, WiFi 6E, 2.5Gb LAN

OPEN BOX

ASUS Corporate Stable Model (CSM) is a commercial program designed to provide stable and reliable motherboards.
Ready for Advanced AI PC: Designed for the future of AI computing, with the power and connectivity needed for demanding AI applications
Intel® LGA 1851 Socket: Ready for Intel® Core™ Ultra Processors (Series 2)
Robust Power Solution: 7+1+1+1 80A DrMOS power stages, 8 pin ProCool power connector, alloy chokes and durable capacitors for stable power delivery
Latest M.2 Support: One onboard PCIe 5.0 M.2 slot equipped with one M.2 heatsink and one PCIe 4.0 M.2 slot
Ultrafast Connectivity: WiFi 6E, PCIe 5.0 x16 slot, Realtek 2.5Gb Ethernet, rear USB 20Gbps Type-C® port, front USB 10Gbps Type-C® connector
High-Performance Networking: On-board Wi-Fi 6E and Realtek 2.5 Gb Ethernet
Optimized Thermal Design: Enlarged VRM heatsinks, one M.2 heatsink, PCH heatsink, hybrid fan headers and Fan Xpert 2+
DIY Friendly Design: Q-Dashboard, Q-DIMM, Q-LED Core, Q-slot

The Open Box Product Disclaimer applies to this product. Please note that this product is non-returnable and non-refundable.

Overview

Specs

Supported CPU
CPU Socket Type	LGA 1851
CPU Type	Support Intel® Core™ Ultra Processors (Series 2) , LGA1851* Supports Intel® Turbo Boost Technology 2.0 and Intel® Turbo Boost Max Technology 3.0** * Refer to https://www.asus.com/support/download-center/ for CPU support list. ** Intel® Turbo Boost Max Technology 3.0 support depends on the CPU types.

Chipsets
Chipset	Intel B860

Memory
Number of Memory Slots	4x288pin (DDR5)
Memory Standard	4 x DIMM slots, max. 192GB, DDR5 Supports up to 8400+MT/s (OC), Non-ECC,Un-buffered ,Clocked Unbuffered DIMM (CUDIMM)* Dual channel memory architecture DIMM Fit Supports Intel® Extreme Memory Profile (XMP) memory module ASUS Enhanced Memory Profile III(AEMPIII) * Supported memory types, data rate (speed), and number of DRAM modules vary depending on the CPU and memory configuration, for more information please refer to CPU/Memory Support list under the Support tab of product information site or visit https://www.asus.com/support/download-center/. * Non-ECC, un-buffered DDR5 memory supports On-Die ECC function.
Maximum Memory Supported	192GB
Channel Supported	Dual Channel

Expansion Slots
PCI Express 5.0 x16	1 x PCI Express 5.0 x16
PCI Express 4.0 x16	1 x PCIe 4.0 x16 slot (supports x4 mode) 1 x PCIe 4.0 x1 slot - To ensure compatibility of the device installed, please refer to https://www.asus.com/support/download-center/ for the list of supported peripherals.

Storage Devices
Serial ATA (SATA)	4 x SATA 6Gb/s
M.2	Total supports 2 x M.2 slots and 4 x SATA 6Gb/s ports* Intel® Core™ Ultra Processors (Series 2) * M.2_1 slot (Key M), type 2242/2260/2280 (supports PCIe 5.0 x4 mode)
SATA RAID	0/1/5/10

Onboard Audio
Audio Channels	Realtek 7.1 Surround Sound High Definition Audio CODEC* - Supports: Jack-detection, Multi-streaming, Front Panel Jack-retasking - Supports up to 24-Bit/192 kHz playback Audio Features - Audio Shielding - Premium audio capacitors - Dedicated audio PCB layers ** A chassis with an HD audio module in the front panel is required to support 7.1 Surround Sound audio output.

Onboard LAN
Max LAN Speed	1 x Realtek 2.5Gb Ethernet ASUS LANGuard
Wireless LAN	Wi-Fi 6E 2x2 Wi-Fi 6E (802.11ax) Supports 2.4/5/6GHz frequency band* Bluetooth® v5.3** * WiFi 6E 6GHz regulatory may vary between countries, supported only in Windows 11 or later ** The Bluetooth® version may vary, please refer to the Wi-Fi module manufacturer's website for the latest specifications.
Bluetooth	Yes

Rear Panel Ports
Back I/O Ports	1 x USB 20Gbps port (1 x USB Type-C®) 1 x USB 10Gbps port (1 x Type-A) 2 x USB 5Gbps ports (2 x Type-A) 4 x USB 2.0 ports (4 x Type-A ) 2 x DisplayPort 1 x HDMI™ port 1 x Wi-Fi module 1 x Realtek 2.5Gb Ethernet port 3 x Audio jacks

Internal I/O Connectors
Other Connectors	Fan and Cooling Related 1 x 4-pin CPU Fan header 1 x 4-pin CPU OPT Fan header 1 x 4-pin AIO Pump header 3 x 4-pin Chassis Fan headers Power Related 1 x 24-pin Main Power connector 1 x 8-pin +12V CPU Power connector Storage Related 2 x M.2 slots (Key M) 4 x SATA 6Gb/s ports USB 1 x USB 10Gbps connector (supports USB Type-C® ) 1 x USB 5Gbps header supports 2 additional USB 5Gbps ports 1 x USB 2.0 header supports 2 additional USB 2.0 ports Miscellaneous 3 x Addressable Gen 2 headers 1 x Aura RGB header 1 x Clear CMOS header 1 x Chassis Intrusion header 1 x COM Port header 1 x Front Panel Audio header (F_AUDIO) 1 x S/PDIF Out header 1 x SPI TPM header (14-1 pin) 1 x 10-1 pin Front System Panel header 1 x Thunderbolt™ (USB4®) header

Software Feature
Windows 11	Windows 11 (22H2 & later), Windows 10 64-bit(21H2 & later)

Physical Spec
Form Factor	Micro ATX
Dimensions (W x L)	9.6 inch x 9.6 inch (24.4 cm x 24.4 cm)

Features
Features	ASUS 5X PROTECTION III - DIGI+ VRM (- Digital power design with DrMOS) - ESD Guards - LANGuard - Overvoltage protection - Stainless-steel back I/O ASUS Q-Design - Q-Antenna - Q-Dashboard - Q-DIMM - Q-LED Core - Q-Slot ASUS Thermal Solution - M.2 heatsink - VRM heatsink design ASUS EZ DIY - ProCool - Pre-mounted I/O shield Aura Sync - Aura RGB header - Addressable Gen2 headers

Additional Information
First Listed on Newegg	June 27, 2025

Warranty & Returns