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Reliable Micro-ATX Platform for Modern Intel BuildsThe ASUS Prime B860M-K is a Micro-ATX motherboard designed for Intel LGA 1851 processors. Built on the Intel B860 chipset, it provides a stable and efficient foundation for gaming, productivity, and content creation. Its robust power design and optimized layout ensure consistent performance for everyday computing as well as demanding workloads. |  |
 | High-Speed Memory and Flexible ExpansionEquipped with 2 DIMM slots supporting DDR5 memory, the Prime B860M-K can handle up to 128 GB of high-speed RAM, ensuring smooth multitasking and fast application performance. Expansion options include a PCIe 4.0 ×16 slot for graphics cards and 2 M.2 slots for NVMe SSDs, offering versatile storage and graphics upgrade capabilities.
Comprehensive Connectivity and Intelligent FeaturesThe motherboard offers multiple I/O options for USB devices, audio, and networking, providing seamless integration with modern peripherals. ASUS software utilities provide AI-assisted tuning, fan control, and system monitoring, helping users optimize performance, maintain stability, and ensure efficient cooling. |
Key Specifications• Chipset: Intel B860 |  |
| Model No | PRIME B860M-K |
| Part No | 90MB1JT0-M0EAY0 |
| Chipset | Intel® B860 Chipset |
| Form Factor | micro-ATX |
| Socket Compatibility | Supports Intel® Core™ Ultra Processors (Series 2), LGA1851* Supports Intel® Turbo Boost Technology 2.0 and Intel® Turbo Boost Max Technology 3.0** |
| Wireless & Bluetooth | None |
| Ethernet | 1 x Realtek 2.5Gb Ethernet ASUS LANGuard |
| Memory | 2 x 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) |
| Lighting | None |
| Storage Compatibility | 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) Intel® B860 Chipset M.2_2 slot (Key M), type 2242/2260/2280 (supports PCIe 4.0 x4 mode) 4 x SATA 6Gb/s ports * Intel® Rapid Storage Technology supports SATA RAID 0/1/5/10. |
| 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 |
| USB Ports Front (Support ) | 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)** 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 ports** * USB Type-C® power delivery output: max. 5V/3A. ** USB_E1 port, USB_E2 port, USB_E3 port and USB_E4 port share the bandwidth. |
| 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 |
| Audio | 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. |
| 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 |
| Package Content | 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 |
| Product Size ( Dimension ) | 9.6 inch x 8.75 inch (24.4cm x 22.2cm) |
| Warranty | 1 Year ( As per Manufacturer Policy ) |
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