Essential Intel B860 Performance: Asus PRIME B860M-K LGA 1851 Motherboard:

The Asus PRIME B860M-K (90MB1JT0-M0EAY0) is engineered to unleash the full performance of Intel® Core™ Ultra processors (Series 2) on the LGA 1851 socket. Built on the Intel® B860 chipset, this Micro-ATX motherboard offers a robust power design, comprehensive cooling solutions, and intelligent tuning options for daily desktop users, office workstations, and gaming builds.

Equipped with dual DDR5 DIMM slots supporting memory speeds up to 8000+ MHz (OC) via ASUS OptiMem II, the board ensures high-bandwidth multitasking. For expansion and next-gen storage, it features a primary PCIe 5.0 x16 slot with SafeSlot Core+ reinforcement, dual PCIe 4.0 M.2 slots, and Realtek® 2.5Gb Ethernet for low-latency online networking. Completed with Fan Xpert 2+ thermal controls, Aura Sync RGB headers, and legacy video outputs (HDMI & VGA), the PRIME B860M-K provides rock-solid stability in a compact footprint.

Key features:

Next-Gen PCIe 5.0 Expansion: Features a reinforced PCIe 5.0 x16 slot offering double the bandwidth of PCIe 4.0 for next-generation graphics cards.
Dual M.2 PCIe 4.0 Slots: High-speed NVMe storage support delivers up to 64 Gbps data transfer speeds for ultra-fast OS boot times and application loading.
Realtek 2.5Gb Ethernet: Upgraded 2.5G network controller delivers faster data transfers and smooth online gaming compared to standard 1GbE ports.
ASUS OptiMem II: Traced memory signal pathways minimize crosstalk and noise, allowing memory kits to reach higher frequencies with maximum stability.
Comprehensive Cooling Controls: Managed via Fan Xpert 2+ software or BIOS settings to tune onboard fan headers dynamically based on thermal sensors.

specs:

Brand	ASUS
Model	ASUS PRIME B860M-K
Product Number	90MB1JT0-M0EAY0
CPU	Supports Intel® Core™ Ultra Processors (Series 2), LGA1851 // Supports Intel® Turbo Boost Technology 2.0 and Intel® Turbo Boost Max Technology 3.0
Chipset	Intel® B860 Chipset
Memory	2x DIMM slots, max. 128GB, DDR5
Memory Frequency	Supports up to 8800+MT/s (OC), Non-ECC, Un-buffered ,Clocked Unbuffered DIMM (CUDIMM)
Memory Features	Dual channel memory architecture // DIMM Fit // Supports Intel® Extreme Memory Profile (XMP) memory module // ASUS Enhanced Memory Profile III(AEMPIII)
Graphics	1x DisplayPort Supports max. 4K@60Hz as specified in DisplayPort 1.4 // 1x HDMI® ports Supports 4K@60Hz as specified in HDMI® 2.1
Expansion Slots (CPU)	Intel® Core™ Ultra Processors (Series 2): 1x PCIe 4.0 x16 slot
Expansion Slots (Chipset)	Intel® B860 Chipset: 2x PCIe 4.0 x1 slots
Storage	2x M.2 slots // 4x SATA 6Gb/s ports
Storage M.2 (CPU)	Intel® Core™ Ultra Processors (Series 2): M.2_1 slot (Key M), type 2242/2260/2280 (supports PCIe 5.0 x4 mode)
Storage M.2 (Chipset)	Intel® B860 Chipset: M.2_2 slot (Key M), type 2242/2260/2280 (supports PCIe 4.0 x4 mode)
Storage (SATA)	4x SATA 6Gb/s ports
RAID Support	Intel® Rapid Storage Technology supports SATA RAID 0/1/5/10.
USB (Rear)	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)
USB (Front)	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
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
Ethernet	1x Realtek 2.5Gb Ethernet // ASUS LANGuard
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
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
BIOS	256(128+128) Mb Flash ROM, UEFI AMI BIOS
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 Gen 2 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 // UEFI BIOS: ASUS EZ DIY: ASUS CrashFree BIOS 3 - ASUS EZ Flash - ASUS UEFI BIOS EZ Mode - ASUS MyHotkey
Manageability	WOL by PME, PXE
Accessories	Cables: 2 x SATA 6Gb/s cables // Miscellaneous: 1 x I/O Shield \| 1 x M.2 Rubber 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 24.4 x 22.2cm

Resources: https://www.asus.com/motherboards-components/motherboards/prime/prime-b860m-k/techspec/

ASUS PRIME B860M-K LGA1851 Micro-ATX Motherboard

Product Description