ASUS Prime B860M-A Motherboard Socket LGA 1851 Intel B860 Micro-ATX DDR5
ASUS Prime B860M-A Motherboard Socket LGA 1851 Intel B860 Micro-ATX DDR5, photo 2
ASUS Prime B860M-A Motherboard Socket LGA 1851 Intel B860 Micro-ATX DDR5, photo 3
ASUS Prime B860M-A Motherboard Socket LGA 1851 Intel B860 Micro-ATX DDR5, photo 4
ASUS Prime B860M-A Motherboard Socket LGA 1851 Intel B860 Micro-ATX DDR5, photo 5
ASUS Prime B860M-A Motherboard Socket LGA 1851 Intel B860 Micro-ATX DDR5, photo 6
ASUS Prime B860M-A Motherboard Socket LGA 1851 Intel B860 Micro-ATX DDR5, photo 7
ASUS Prime B860M-A Motherboard Socket LGA 1851 Intel B860 Micro-ATX DDR5, photo 8
ASUS

ASUS Prime B860M-A Motherboard Socket LGA 1851 Intel B860 Micro-ATX DDR5

SKU HC-103464MPN 90MB1K00-M0EAYC

  • LGA1851
  • B860
  • Micro-ATX

Highlights

  • Intel B860 chipset with LGA 1851 socket for Arrow Lake CPUs
  • PCIe 5.0 x16 slot plus PCIe 4.0 x4 and x1 slots
  • Four DDR5 DIMM slots up to 192 GB at 8400 MT/s
  • One PCIe 5.0 M.2 and one PCIe 4.0 M.2 with heatsinks
  • 2.5 Gbps LAN and rear USB-C 3.2 Gen 2 port
  • Six 4-pin PWM fan headers and VRM heatsinks

Key specs

Socket
LGA1851
Chipset
B860
Form factor
Micro-ATX
Memory
DDR5
Wi-Fi
No
CPU Socket
1851
All specifications
$129.99
  • ≈ 0.001685 BTC
  • ≈ 0.05677 ETH
  • ≈ 130.12 USDT

In stock Ships by Tue, Nov 10 when paid today.

  • Delivery to the United States: $39.90 DHL Express Worldwide · arrives Wed, Nov 11 – Mon, Nov 16 if paid today
  • Rate locked at checkout Up to 60 min to send BTC, 30 min for ETH and USDT
  • New, sealed and genuine Manufacturer warranty: 3 years
  • 30-day returns Unused items in original packaging
Pay with BTCETHUSDTTRC20USDTERC20

Overview

A Micro-ATX motherboard built on the Intel B860 chipset for LGA 1851 processors. It suits builders who want PCIe 5.0 graphics and storage without CPU overclocking.

Board Layout and Cooling

The Micro-ATX form factor measures 244 by 244 mm in black. It includes an integrated I/O shield, VRM heatsinks, M.2 heatsinks, and a backplate. Six 4-pin PWM headers provide fan and radiator control.

Memory and Expansion

Four DIMM slots accept CUDIMM or UDIMM DDR5 up to 192 GB at 8400 MT/s overclocked. Expansion includes one PCIe 5.0 x16 slot, one PCIe 4.0 x16 slot running at x4, and one PCIe 4.0 x1 slot.

Storage and Connectivity

Two M.2 slots support PCIe 5.0 x4 and PCIe 4.0 x4 NVMe SSDs. Four SATA 6 Gbps ports are available. Rear I/O offers 2.5 Gbps LAN, DisplayPort, HDMI, USB-C 3.2 Gen 2, USB 3.1 Gen 1, two USB 3.0, and four USB 2.0 ports.

Internal Headers and Lighting

Internal connectors include an 8-pin CPU power header, USB4 header, USB 3.2 Gen 1 Type-C header, USB 3.0 header, USB 2.0 header, front panel audio, SPI TPM, one 12V RGB header, and three 5V addressable RGB headers.

Prime B860M-A Motherboard Socket LGA 1851 Intel B860 Micro-ATX DDR5 specifications

General
BrandASUS
Manufacturer part no.90MB1K00-M0EAYC
EAN4711387819869
Warranty3 years (manufacturer)
Form Factor
Motherboard Form FactorMicro-ATX
CPU
CPU ManufacturerIntel
CPU Socket1851
Motherboard
Motherboard ChipsetIntel B860
Built-In I/O ShieldYes
Memory
Max. Memory192 GB
Memory TypeDDR5
Memory Form FactorDIMM
System Memory SubtypeCUDIMM, UDIMM
Max. Memory Speed (OC)8400 MT/s
ECC SupportYes
Memory slots4x
Wi-Fi & LAN
LANYes
LAN Ports1x 2.5 Gbit/s
Wi-Fi / BluetoothNo
Cooling
BackplateYes
M.2 HeatsinksYes
VRM HeatsinksYes
Internal Ports
CPU Power Supply1x 8-Pin
USB4 (internal) Header1
USB 3.0 / 3.1 / 3.2 (internal) Type C Header1
USB 3.0 / 3.1 / 3.2 (internal) Type C Possible Ports1
USB 3.0 (internal) Header1
USB 3.0 (internal) Possible Ports2
USB 2.0 (internal) Header1
USB 2.0 (internal) Possible Ports2
RGB / LED connectors1x RGB (4-Pin 5050 12VGRB), 3x Digital RGB (3-Pin 5VDG)
Front Panel Audio HeaderYes
SPI TPM HeaderYes
External Ports
USB 3.2 (external) Type C1
USB 3.1 (external) Type A1
USB 3.0 (external) Type A2
USB 2.0 (external) Type A4
Display ConnectorsDisplayPort (2x), HDMI (1x)
Storage Ports
M.2 PCIe 4.0 x41
M.2 PCIe 5.0 x41
SATA 6G (internal)4
Expansion Slots
PCIe x16 slots (total)2
PCIe x1 slots (total)1
Fan Header
4 Pin Fan Connectors6
Lighting
Lighting / RGBYes
Color
Primary ColorBlack
Dimensions
Length / Depth244 mm
Width244 mm

Specifications come from the manufacturer and can change without notice. Check the box contents and compatibility before ordering; our team answers questions within one business day.

Shipping & returns

Delivery to the United States: $39.90DHL Express Worldwide · arrives Wed, Nov 11 – Mon, Nov 16 if paid today

Ships from our warehouse in Germany: in stock, it leaves within 1–2 business days, tracked to the door.
ToBusiness daysThis item
GermanyDHL Paket1–2$5.90
Other EU countriesDHL Parcel International2–8$11.90–$15.90
UK, Switzerland and NorwayDHL Parcel International3–7$24.90
United States and CanadaDHL Express Worldwide2–5$39.90
Asia and the Middle EastDHL Express Worldwide2–5$49.90
Australia and New ZealandDHL Express Worldwide3–6$59.90
  • Discreet packaging Plain, unbranded box — no crypto or brand references outside
  • Returns 30 days for unused items in original packaging; faulty items are on us
Rates and delivery times by country

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