ASUS PRIME B860M-K Micro-ATX Motherboard, LGA 1851, DDR5 Up to 8800MHz, PCIe 4.0, Realtek 2.5Gb Ethernet, 1x M.2 PCIe 5.0, 4x SATA, and USB 10GbpI

ASUS PRIME B860M-K – Specifications

CPU Support

• Socket: LGA1851

• Compatible with Intel® Core™ Ultra Processors (Series 2)

• Supports Intel® Turbo Boost Technology 2.0

• Supports Intel® Turbo Boost Max Technology 3.0
  *Refer to ASUS CPU support list for detailed compatibility.

Chipset

• Intel® B860 Chipset

Memory

• 2 x DDR5 DIMM slots, up to 128GB

• Supports up to 8800+ MT/s (OC)

• Non-ECC, Un-buffered, Clocked Unbuffered DIMM (CUDIMM)

• Dual-channel memory architecture

• Supports Intel® XMP and ASUS Enhanced Memory Profile III (AEMP III)

• DDR5 On-Die ECC supported

Graphics Outputs

• 1 x DisplayPort 1.4 (Max. 4K @ 60Hz)

• 1 x HDMI™ 2.1 (Max. 4K @ 60Hz)
  *Graphics output specifications depend on CPU.

Expansion Slots

• From CPU:

  • 1 x PCIe 4.0 x16

• From Chipset:

  • 2 x PCIe 4.0 x1

Storage

• Total: 2 x M.2 slots + 4 x SATA 6Gb/s ports

• M.2_1 (CPU): PCIe 5.0 x4 (2242/2260/2280)

• M.2_2 (Chipset): PCIe 4.0 x4 (2242/2260/2280)

• 4 x SATA 6Gb/s ports

• Supports Intel® Rapid Storage Technology with SATA RAID 0/1/5/10

Ethernet

• 1 x Realtek 2.5Gb Ethernet

• ASUS LANGuard protection

USB Ports

Rear I/O (6 ports)

• 1 x USB 10Gbps (Type-A)

• 2 x USB 5Gbps (Type-A)

• 3 x USB 2.0 (Type-A)

Front Panel (7 ports)

• 1 x USB 5Gbps Type-C® connector

• 1 x USB 5Gbps header (2 ports)

• 2 x USB 2.0 headers (4 ports)
  Note: Some ports share bandwidth.

Audio

• Realtek 7.1 Surround Sound High Definition Audio CODEC

• Supports Jack-detection, Multi-streaming, Front Panel Jack-retasking

• Up to 24-bit / 192 kHz playback

• Audio shielding, premium capacitors, and dedicated audio PCB layers
  HD front panel required for full 7.1 support.

Back Panel I/O Ports

• 1 x USB 10Gbps (Type-A)

• 2 x USB 5Gbps (Type-A)

• 3 x USB 2.0 (Type-A)

• 1 x DisplayPort

• 1 x HDMI™ port

• 1 x Realtek 2.5Gb Ethernet port

• 3 x Audio jacks

• 1 x PS/2 keyboard/mouse combo port

Internal I/O Headers

• 1 x 24-pin ATX main power connector

• 1 x 8-pin +12V CPU power connector

• 2 x M.2 slots

• 4 x SATA 6Gb/s ports

• 1 x USB 5Gbps Type-C® connector

• 1 x USB 5Gbps header (2 ports)

• 2 x USB 2.0 headers (4 ports)

• 1 x 4-pin CPU fan header

• 2 x 4-pin chassis fan headers

• 2 x Addressable RGB Gen 2 headers

• 1 x Aura RGB header

• 1 x Front panel audio header

• 1 x S/PDIF Out header

• 1 x COM port header

• 1 x Clear CMOS header

• 1 x SPI TPM header (14-1 pin)

• 1 x 10-1 pin front panel system header

Special Features

ASUS 5X Protection III

• DIGI+ VRM

• LANGuard

• Overvoltage protection

• SafeSlot Core+

• Stainless-steel back I/O

ASUS Q-Design

• Q-DIMM

• Q-LED Core

• Q-Slot

• Q-Dashboard

Thermal & DIY Features

• VRM heatsink design

• ProCool power connector

Aura Sync

• Aura RGB header

• 2 x Addressable Gen 2 headers

Software

• Armoury Crate (Aura Sync, Fan Xpert 2+, Power Saving)

• ASUS AI Advisor

• ASUS DriverHub

• ASUS CPU-Z

• Norton 360 Deluxe (60-Day Trial)

• WinRAR (40-Day Trial)

BIOS

• 256Mb (128+128) UEFI AMI BIOS

• ASUS CrashFree BIOS 3

• ASUS EZ Flash

• ASUS UEFI BIOS EZ Mode

• ASUS MyHotkey

Manageability

• WOL by PME

• PXE boot support

Accessories Included

• 2 x SATA 6Gb/s cables

• 1 x I/O Shield

• 1 x M.2 anchor package

• 1 x Quick Start Guide

Operating System Support

• Windows 11 (22H2 & later)

• Windows 10 64-bit (21H2 & later)

Form Factor

• micro-ATX

• Dimensions: 9.6 x 8.75 inches (24.4 x 22.2 cm)