ASUS PRIME series motherboards are expertly engineered to unleash the full potential of the latest Intel Core Ultra Processors (Series 2). Boasting a robust power design, comprehensive cooling solutions and intelligent tuning options, the PRIME B860M-K motherboard provides users and PC DIY builders with a range of performance optimizations via intuitive software and firmware features. It's designed to be Advanced AI PC-ready, offering the power and connectivity needed for demanding AI applications.
Digital Power Design
Stable power is crucial for maximizing the performance of Intel Core Ultra Processors (Series 2).The PRIME B860M-K features an 6+1+1+1 phase design with discrete MOSFETs,ensuring efficient and stable power delivery for Intel processors plus steady performance for day-to-day use.
AEMP III for Ultimate DDR5 Performance
ASUS Enhanced Memory Profile III (AEMP III) is an advanced firmware feature that empowers users to achieve unparalleled memory performance with cutting-edge CUDIMM memory. Through a two-phase comprehensive tuning process, AEMP III first optimizes the clock driver and then the memory frequency. This results in the best balance between performance and stability, even at cutting-edge speeds of DDR5-7600 or higher.2
DIMM Fit / DIMM Fit Pro
DIMM Fit is an ASUS-exclusive BIOS feature that precisely analyzes individual memory modules to optimize performance and pinpoint potential issues. DIMM Fit Pro gives advanced PC builders more extensive customizability for memory tuning. It allows users to control up to twenty overclocking parameters, define testing ranges, and prioritize stability or performance, offering a more flexible and granular approach to memory optimization.
Two M.2 slots (up to 128Gbps)
PRIME B860M-K offers a total of two M.2 slots, including one that supports data-transfer speeds of up to 128Gbps via PCIe 5.0, one that supports 64Gbps via PCIe 4.0. This enables quicker boot-up and app load times with OS or application drives.3
Cooler by design
The PRIME B860M-K motherboard is engineered with multiple onboard heatsinks and an array of hybrid fan headers to help ensure your rig stays cool and stable under intense workloads.
ASUS Fan Xpert 2+
ASUS Fan Xpert 2+ software provides comprehensive control over fans. An Auto-Tuning mode intelligently configures all parameters with a single click. There's also an Extreme Quiet mode that reduces chassis fan speeds to below the default minimum to keep your system whisper-quiet when performing light tasks. Fans can also be controlled via the UEFI BIOS.4
Empowering connections
This motherboard offers a versatile range of connectivity, including support for PCIe 5.0 M.2, PCIe 4.0 slot and an arsenal of USB ports which includes Type-C connection
Realtek 2.5Gb Ethernet
Realtek 2.5Gb Ethernet reduces CPU overhead and offers exceptionally high TCP and UDP throughput for faster, smoother data transfers.
USB 5Gbps Type-C
A batch of USB ports support high-end rigs loaded with peripherals, including a front USB Type-C connector with ultrafast USB 5Gbps for transmission speeds of up to 5Gbps.
Model
PRIME B860M-K
News & Updates
Please visit our GLOBAL website to check and download the latest updates.
CPU
Supports Intel Core Ultra Processors (Series 2), LGA1851x
Supports Intel Turbo Boost Technology 2.0 and Intel Turbo Boost Max Technology 3.0xx
x Refer to https://www.asus.com/support/download-center/ for CPU support list.
xx Intel Turbo Boost Max Technology 3.0 support depends on the CPU types.
Chipset
Intel B860 Chipset
Memory
2 x DIMM slots, max. 128GB, DDR5
Supports up to 8800+MT/s (OC), Non-ECC, Un-buffered ,Clocked Unbuffered DIMM (CUDIMM)x
Dual channel memory architecture
DIMM Fit
Supports Intel Extreme Memory Profile (XMP) memory module
ASUS Enhanced Memory Profile III(AEMPIII)
x 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/. Adjustments will be made based on the specifications of mass-produced memory products available on the market.
xx Non-ECC, un-buffered DDR5 memory supports On-Die ECC function.
Graphics
1 x DisplayPortxx
1 x HDMI portxxx
x Graphics specifications may vary between CPU types. Please refer to www.intel.com for any updates.
xx Supports max. 4K@60Hz as specified in DisplayPort 1.4.
xxx Supports 4K@60Hz as specified in HDMI 2.1.
xxxx VGA resolution support depends on processors' or graphic cards' resolution.
Expansion Slots
Intel Core Ultra Processors (Series 2)
1 x PCIe 4.0 x16 slot
Intel B860 Chipset
2 x PCIe 4.0 x1 slots
- To ensure compatibility of the device installed, please refer to https://www.asus.com/support/download-center/ for the list of supported peripherals.
Storage
Total supports 2 x M.2 slots and 4 x SATA 6Gb/s portsx
Intel Core Ultra Processors (Series 2) x
M.21 slot (Key M), type 2242/2260/2280 (supports PCIe 5.0 x4 mode)
Intel B860 Chipset
M.22 slot (Key M), type 2242/2260/2280 (supports PCIe 4.0 x4 mode)
4 x SATA 6Gb/s ports
x Intel Rapid Storage Technology supports SATA RAID 0/1/5/10.
Ethernet
1 x Realtek 2.5Gb Ethernet
ASUS LANGuard
USB
Rear USB (Total 6 ports)
1 x USB 10Gbps port (1 x Type-A)
2 x USB 5Gbps ports (2 x Type-A)
3 x USB 2.0 ports (3 x Type-A)xx
Front USB (Total 7 ports)
1 x USB 5Gbps connector (supports USB Type-C )
1 x USB 5Gbps header supports 2 additional USB 5Gbps ports
2 x USB 2.0 headers support 4 additional USB 2.0 portsxx
x USB Type-C power delivery output: max. 5V/3A.
xx USBE1 port, USBE2 port, USBE3 port and USBE4 port share the bandwidth.
Audio
Realtek 7.1 Surround Sound High Definition Audio CODECx
- 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
x A chassis with an HD audio module in the front panel is required to support 7.1 Surround Sound audio output.
Back Panel I/O Ports
1 x USB 10Gbps port (1 x Type-A)
2 x USB 5Gbps ports (2 x Type-A)
3 x USB 2.0 ports (3 x Type-A)
1 x DisplayPort
1 x HDMITM port
1 x Realtek 2.5Gb Ethernet port
3 x Audio jacks
1 x PS/2 Keyboard/Mouse combo port
Internal I/O Connectors
Fan and Cooling Related
1 x 4-pin CPU Fan header
2 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 5Gbps connector (supports USB Type-C )
1 x USB 5Gbps header supports 2 additional USB 5Gbps ports
2 x USB 2.0 headers support 4 additional USB 2.0 ports
Miscellaneous
2 x Addressable Gen2 headers
1 x Aura RGB header
1 x Clear CMOS 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 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-Dashboard
- Q-DIMM
- Q-LED Core
- Q-Slot
ASUS Thermal Solution
- VRM heatsink design
ASUS EZ DIY
- ProCool
Aura Sync
- Aura RGB header
- Addressable Gen2 headers
Software Features
ASUS Exclusive Software
Armoury Crate
- Aura Sync
- Fan Xpert 2+
- Power Saving
ASUS AI Advisor
ASUS DriverHub
ASUS CPU-Z
Norton 360 Deluxe (60 Days Free Trial)
WinRAR (40 Days Free Trial)
UEFI BIOS
ASUS EZ DIY
- ASUS CrashFree BIOS 3
- ASUS EZ Flash
- ASUS UEFI BIOS EZ Mode
- ASUS MyHotkey
BIOS
256(128+128) Mb Flash ROM, UEFI AMI BIOSManageability
WOL by PME, PXE
Accessories
Cables
2 x SATA 6Gb/s cables
Miscellaneous
1 x I/O Shield
1 x M.2 anchor package
Documentation
1 x Quick start guide
Operating System
Windows 11(22H2 & later), Windows 10 64-bit(21H2 & later)
Form Factor
micro-ATX Form Factor
9.6 inch x 8.75 inch (24.4cm x 22.2cm)
What's in the box
Cables
2 x SATA 6Gb/s cables
Miscellaneous
1 x I/O Shield
1 x M.2 anchor package
Documentation
1 x Quick start guide
