Description

ASUS PRIME B860M-K Intel B860 LGA 1851 Arrow Lake Micro-ATX Motherboard

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ASUS PRIME B860-K

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.

AI Solutions

ASUS AI Solutions include AI Advisor as your technical expert with expertise in PC performance.

AI Advisor
ASUS AI Advisor allows users to explore the functionality and advanced features of ASUS motherboards in a simple and straightforward way.

Digital Power Design

Stable power is crucial for maximising 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.

ProCool Connector

Proprietary connector augments the motherboard’s link to the power supply with 8-pin connector that passes 12 volts of power directly to the processors. This connector features solid pins that can handle more current than hollow-pin connectors.

Power Saving

The Power Saving function contains several settings to easily optimise power consumption and maximise energy savings. You can enable a CPU power limit, darken Aura lighting and set the fan profile to a Power Saving mode. You can also toggle the Power Saver plan that is built into Microsoft Windows.

Digi+ VRM Control

The Digi+ voltage-regulator module (VRM) delivers real-time control over voltage droop, automatically switching frequency and power-efficiency settings.

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 optimises 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.

DIMM Fit

DIMM Fit is an ASUS-exclusive BIOS feature that precisely analyses individual memory modules to optimise performance and pinpoint potential issues. This offers peak efficiency, compatibility, and system stability. Whether you are an overclocker seeking ultimate performance, a competitor pursuing the most responsive gameplay, or a content creator prioritising rock-solid stability, DIMM Fit provides optimisations tailored to your needs and your hardware configuration.

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.

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.

VRM heatsinks and Thermal Pads
The VRM heatsinks and thermal pads improve heat transfer from the MOSFETs for better cooling performance.

Multiple Temperature Sources
Each header can dynamically reference three thermal sensors. Fan Xpert 2+ lets you to map the temperature of supported ASUS graphics cards to optimise cooling for GPU- and CPU-intensive tasks.

4-Pin PWM/DC Fan
Each onboard header supports auto-detection of PWM or DC fans.

Passive Chipset Heatsink
An aluminium passive chipset heatsink ensures optimal cooling and stable performance. It is more durable and longer-lasting than heatsinks with fans, which can be vulnerable to the build-up of dust and debris.

Smart Protection
A dedicated integrated circuit protects each fan header from overheating and excess current.

Smart Cooling Precision
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.

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.

Customisation and Personalisation

The PRIME B860M-K enhances the user experience across the board, from simplifying BIOS setting adjustments to offering customisable RGB lighting controls for a uniquely personal system aesthetic.

UEFI BIOS
The UEFI interface delivers easy-to-use configuration options for PC beginners, and advanced features for veterans.

ASUS DriverHub
Simplify driver management with automatic detection, one-click installation and update for smooth, efficient system performance.

Armoury Crate
Customise Aura Sync RGB and control ASUS devices. Includes product registration and updates.

Aura Sync
Complete RGB lighting control for enthusiast systems, ensuring seamless synchronisation with compatible hardware.

Addressable Gen2 RGB headers
Two Addressable Gen2 headers detect LED counts on compatible RGB devices, automatically adjusting lighting effects accordingly.

DIY friendly

The PRIME B860M-K motherboard features EZ PC DIY innovations that simplify and speed up the PC building process, making DIY easy and convenient.

SafeSlot Core+
SafeSlot Core+ is a one-piece stainless-steel brace that shields the slot to protect it from damage. The metal cover is tightly secured to the slot with hooks, and the entire assembly is firmly anchored to the PCB with strengthened solder points to provide a secure foundation for heavyweight graphics cards.

Q-LED Core
The Q-LED Core display produces color-coded lights during the Power-On Self-Test (POST) that can help you troubleshoot potential issues.

SPECIFICATIONS
Brand	ASUS
Series	PRIME Series
Model	PRIME B860M-K
CPU Support	Intel Socket LGA 1851 for Core Ultra Series Processors (Series 2)
Chipset	Intel B860 Express
Memory Support
Intel Core Ultra Series Processors (Series 2)	2x DIMM slots, max. 128GB, DDR5
	Supports up to 8800 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)
Video
HDMI	1x HDMI 2.1 (TMDS) port, supporting a maximum resolution of UHD 4K 3840×2160 @ 60Hz, Support for HDCP 2.3, and HDR
DisplayPort	1x DisplayPort 1.4 port, supporting a maximum resolution of UHD 4K 3840×2160 @ 60Hz, Support for HDCP 2.3, and HDR
	Integrated graphics required. Actual support may vary by CPU.
Expansion Slots
CPU Direct	1x PCIe 4.0 x16 Physical, x16 Electrical slot
Intel B860 Chipset	2x PCIe 4.0 x1 Physical, x1 Electrical slots
Storage
CPU Direct	M.2_1 slot (Key M), type 2242/2260/2280 (supports PCIe 5.0 x4 mode)
Intel B860 Chipset	M.2_2 slot (Key M), type 2242/2260/2280 (supports PCIe 4.0 x4 mode)
	4x SATA 6Gb/s ports
	Intel Rapid Storage Technology supports SATA RAID 0/1/5/10.
Networking
LAN	Realtek 2.5 Gigabit LAN 10/100/1000/2500Mbps
	ASUS LANGuard Protection
WiFi	N/A
Bluetooth	N/A
Audio
Codec	Realtek 7.1 Surround Sound CODEC
	Supports Jack-detection, Multi-streaming, Front Panel Jack-retasking, Impedence sense for front-panel headphones
	Supports up to 24-Bit/192 kHz playback
	Dedicated audio PCB layers
	Audio Shielding
Connectivity
Ports	1x USB 10Gbps Type-A Port
	2x USB 5Gbps Type-A Ports
	3x USB 2.0 Type-A Port
	1x HDMI 2.1 (TMDS)
	1x DisplayPort 1.4 Port
	3x 3.5mm Audio Jacks Support Surround Sound
	1x PS/2 Combo Port (Keyboard, Mouse)
	1x Realtek 2.5 Gigabit Ethernet RJ-45 LAN
General
Internal Connectors	1x 4-pin CPU Fan header
	2x 4-pin Chassis Fan headers
	1x 24-pin Main Power connector
	1x 8-pin 12V CPU Power connector
	2x M.2 slots (Key M)
	4x SATA 6Gb/s ports
	1x USB 5Gbps connector (supports USB Type-C )
	1x USB 5Gbps header supports 2 additional USB 5Gbps ports
	2x USB 2.0 headers support 4 additional USB 2.0 ports
	2x Addressable Gen2 headers
	1x Aura RGB header
	1x Clear CMOS header
	1x COM Port header
	1x Front Panel Audio header (F_AUDIO)
	1x S/PDIF Out header
	1x SPI TPM header (14-1 pin)
	1x 10-1 pin Front Panel System header
Buttons	N/A
LED Displays	ASUS Q-LED Core Diagnostic LED (via power LED)
BIOS	256Mb Flash ROM, UEFI AMI BIOS
Remote Management	WOL by PME, PXE
Form Factor	Micro-ATX Form Factor, 244 x 222 mm (H x W)
Operating System Support	Windows 11 64-bit
Box Contents	2x SATA 6Gb/s cables
	1x I/O Shield
	1x M.2 anchor package
	1x Quick start guide
Warranty Information
Warranty	3 Year Warranty