Description
ASUS PRIME B860M-K – Specifications
CPU Support
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Socket: LGA1851
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Compatible with Intel® Core™ Ultra Processors (Series 2)
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Supports Intel® Turbo Boost Technology 2.0
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Supports Intel® Turbo Boost Max Technology 3.0
*Refer to ASUS CPU support list for detailed compatibility.
Chipset
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Intel® B860 Chipset
Memory
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2 x DDR5 DIMM slots, up to 128GB
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Supports up to 8800+ MT/s (OC)
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Non-ECC, Un-buffered, Clocked Unbuffered DIMM (CUDIMM)
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Dual-channel memory architecture
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Supports Intel® XMP and ASUS Enhanced Memory Profile III (AEMP III)
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DDR5 On-Die ECC supported
Graphics Outputs
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1 x DisplayPort 1.4 (Max. 4K @ 60Hz)
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1 x HDMI™ 2.1 (Max. 4K @ 60Hz)
*Graphics output specifications depend on CPU.
Expansion Slots
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From CPU:
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1 x PCIe 4.0 x16
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From Chipset:
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2 x PCIe 4.0 x1
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Storage
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Total: 2 x M.2 slots + 4 x SATA 6Gb/s ports
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M.2_1 (CPU): PCIe 5.0 x4 (2242/2260/2280)
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M.2_2 (Chipset): PCIe 4.0 x4 (2242/2260/2280)
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4 x SATA 6Gb/s ports
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Supports Intel® Rapid Storage Technology with SATA RAID 0/1/5/10
Ethernet
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1 x Realtek 2.5Gb Ethernet
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ASUS LANGuard protection
USB Ports
Rear I/O (6 ports)
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1 x USB 10Gbps (Type-A)
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2 x USB 5Gbps (Type-A)
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3 x USB 2.0 (Type-A)
Front Panel (7 ports)
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1 x USB 5Gbps Type-C® connector
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1 x USB 5Gbps header (2 ports)
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2 x USB 2.0 headers (4 ports)
Note: Some ports share bandwidth.
Audio
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Realtek 7.1 Surround Sound High Definition Audio CODEC
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Supports Jack-detection, Multi-streaming, Front Panel Jack-retasking
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Up to 24-bit / 192 kHz playback
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Audio shielding, premium capacitors, and dedicated audio PCB layers
HD front panel required for full 7.1 support.
Back Panel I/O Ports
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1 x USB 10Gbps (Type-A)
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2 x USB 5Gbps (Type-A)
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3 x USB 2.0 (Type-A)
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1 x DisplayPort
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1 x HDMI™ port
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1 x Realtek 2.5Gb Ethernet port
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3 x Audio jacks
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1 x PS/2 keyboard/mouse combo port
Internal I/O Headers
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1 x 24-pin ATX main power connector
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1 x 8-pin +12V CPU power connector
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2 x M.2 slots
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4 x SATA 6Gb/s ports
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1 x USB 5Gbps Type-C® connector
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1 x USB 5Gbps header (2 ports)
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2 x USB 2.0 headers (4 ports)
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1 x 4-pin CPU fan header
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2 x 4-pin chassis fan headers
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2 x Addressable RGB Gen 2 headers
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1 x Aura RGB header
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1 x Front panel audio header
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1 x S/PDIF Out header
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1 x COM port header
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1 x Clear CMOS header
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1 x SPI TPM header (14-1 pin)
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1 x 10-1 pin front panel system header
Special Features
ASUS 5X Protection III
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DIGI+ VRM
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LANGuard
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Overvoltage protection
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SafeSlot Core+
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Stainless-steel back I/O
ASUS Q-Design
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Q-DIMM
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Q-LED Core
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Q-Slot
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Q-Dashboard
Thermal & DIY Features
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VRM heatsink design
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ProCool power connector
Aura Sync
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Aura RGB header
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2 x Addressable Gen 2 headers
Software
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Armoury Crate (Aura Sync, Fan Xpert 2+, Power Saving)
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ASUS AI Advisor
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ASUS DriverHub
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ASUS CPU-Z
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Norton 360 Deluxe (60-Day Trial)
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WinRAR (40-Day Trial)
BIOS
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256Mb (128+128) UEFI AMI BIOS
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ASUS CrashFree BIOS 3
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ASUS EZ Flash
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ASUS UEFI BIOS EZ Mode
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ASUS MyHotkey
Manageability
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WOL by PME
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PXE boot support
Accessories Included
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2 x SATA 6Gb/s cables
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1 x I/O Shield
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1 x M.2 anchor package
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1 x Quick Start Guide
Operating System Support
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Windows 11 (22H2 & later)
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Windows 10 64-bit (21H2 & later)
Form Factor
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micro-ATX
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Dimensions: 9.6 x 8.75 inches (24.4 x 22.2 cm)
