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Product Overview

The Asus PRIME B860M-K is a micro ATX motherboard built on the Intel B860 chipset for LGA 1851 processors, covering the Intel Core Ultra (Series 2, Arrow Lake) range. It has two DDR5 DIMM slots supporting speeds up to DDR5-8800+ (OC), two M.2 slots (the first up to PCIe 5.0, the second PCIe 4.0), four SATA III ports and a PCIe 4.0 x16 slot.

With a micro ATX footprint, 2.5 Gigabit Ethernet and 7.1-channel audio, this board suits compact and mid-size gaming or everyday PC builds around a Core Ultra CPU. HDMI and DisplayPort outputs work when paired with a CPU that has integrated graphics. It also offers three PWM fan headers, RGB and addressable RGB headers and a TPM header. Note that a BIOS update may be needed for the newest processors, and there is no onboard Wi-Fi.

Specification

• Manufacturer: Asus
• Model: PRIME B860M-K
• MPN: 90MB1JT0-M0EAY0
• EAN: 4711387808498
• CPU socket: LGA 1851 (Socket V1)
• Chipset: Intel B860
• Supported processors: Intel Core Ultra 3/5/7/9 (Series 2, Arrow Lake)
• Form factor: micro ATX
• Memory: 2x DDR5 DIMM, dual-channel, non-ECC, up to DDR5-8800+ (OC)
• Maximum memory: 96 GB (per Wave data; Icecat lists 128 GB)
• Expansion slots: 1x PCIe 4.0 x16, 2x PCIe 4.0 x1
• M.2 slots: 2x M.2 (M key), 2280; 1st up to PCIe 5.0, 2nd up to PCIe 4.0
• SATA ports: 4x SATA III, RAID 0/1/5/10
• Rear USB: 1x USB 3.2 Gen 2 Type-A, 2x USB 3.2 Gen 1 Type-A, 3x USB 2.0
• Video outputs: 1x HDMI, 1x DisplayPort (needs CPU with integrated graphics)
• Networking: Realtek 2.5 Gb Ethernet, no Wi-Fi
• Audio: Realtek 7.1 surround
• Fan and RGB headers: 3x 4-pin PWM fan, 1x RGB, 2x addressable RGB
• Power connectors: 24-pin ATX + 8-pin ATX12V
• Dimensions (W x D): 244 x 222 mm

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